2024-11-17 22:46:45 +01:00
46 changed files with 181 additions and 2705 deletions
--- a/1
+++ b/1
@ -1 +0,0 @@
 The contract is intended for slow rates of decay (e.g. 2% per month). Very high levels of decay (2% per minute) will lead to overflows, and will need a more flexible implementation to support it.
--- a/10
+++ b/10
@ -1,10 +0,0 @@
 all: python solidity doc
 python:
 	make -C python
 solidity:
 	make -C solidity
 doc:
 	make -C doc/texinfo
 readme:
 	make -C doc/texinfo readme
 	pandoc -f docbook -t gfm doc/texinfo/build/docbook.xml > README.md
--- a/README.md
+++ b/README.md
@ -1,405 +1,95 @@
-# Overview
+# RedistributedDemurrageToken
-    de-mur-rage
+**this documentation is obsolete, will rewrite asap**
-    1: the detention of a ship by the freighter beyond the time allowed for loading, unloading, or sailing
+## Use Case
-
+* Network / Basic Income Token
-    2: a charge for detaining a ship, freight car, or truck
+  * 100 Sarafu is distributed to anyone in Kenya after user validation by the owner of a faucet which mints new Sarafu.
-
+    * Validated users are those that validate their phone number in Kenya.
-This ERC20 smart contract implementation for the EVM imposes a demurrage
+  * A Sarafu holding tax aka ([demurrage](https://en.wikipedia.org/wiki/Demurrage_(currency))) of 0.000050105908373373% is charged from users per minute - such that over 1 month to total tax would be 2%. 
-on all held token balances.
+  * After 1 week the total amount tax is distributed evenly out to _active_ users.
-
+    *  any single transaction by a user within that week is considered _active_ (heartbeat) 
-The demurrage is a continuous value *decay*, subtracted from all
+  * This is meant to result in a disincentivization to hold (hodl) the Sarafu token and increase its usage as a medium of exchange rather than a store of value.
-balances every minute.
+  * This token can be added to liquidity pools with other ERC20 tokens and or Community Inclusion Currencies (CICs) - and thereby act as a central network token and connect various tokens and CICs together.
-
+  * Example 
-Also. a time period is defined at contract creation time at which the
+    -  With a demurrage of 2% (net per month) and a reward period of 1 month - If there are 10 users all with balances of 1000 Sarafu and only 2 of them trade that month (assume they trade back and forth with no net balance change). 
-difference between held balances and the demurrage can be withdrawn to a
+    - Then the resulting balances after one tax period of those two trading would be 1080 Sarafu while the remaining non-active users would be 980 Sarafu. If this behaviour continued in the next tax period, with the same two users only trading (with no net balance changes), they would have 1158.39999968 Sarafu and those users that are not trading would have their balances further reduced to 960.40 Sarafu. If this continued on ~forever those two active trading users would have the entire token supply and the non-trading users would eventually reach a zero balance.
-pre-selected address, which in turn can redistribute that token value.
+    - this example calculation for 3 tax periods can be found here: https://gitlab.com/grassrootseconomics/cic-docs/-/blob/master/demurrage-redist-sarafu.ods
 In short: Everyone is taxed a little something every minute, and every
 so often a decision is made on how to redistribute that tax.
 ## Features
 - Continuous decay of all balances.
 - Capture and redistribution of decayed balances.
 - Per-minute decay resolution.
 - Minting and burning of vouchers.
 - Grant and revoke access to mint and burn vouchers.
 - Voucher expiration (modifiable anytime after publishing).
 - Supply cap (modifiable anytime after publishing).
 - Constant gas usage across exponential calculations.
 ## Nomenclature
-‘`Demurrage`’  
+* `Demurrage` aka Decay amount: A percentage of token supply that will be charged once per minute and evenly redistributed to _active_ users every Demurrage Period (minutes)
-A percentage of token supply that will continuously be removed.
+* Base balance: The inflated balance of each user is stored for bookkeeping.
 * Sink Token Address: Rounding errors and if no one trades the tax goes to this address
 * Demurrage Period (minutes)- aka `period`: The number of minutes over which a user must be _active_ to receive tax-redistibution. 
 ‘`Demurrage Period`’  
 A period of time denominated in minutes after which demurraged amounts
 are available for redistribution.
-‘`Sink Account`’  
+## Ownership
 The intermediate beneficiary of the demurraged amount, which may or may
 not redistribute value.
-‘`Base balance`’  
+* Contract creator is owner
-The inflated balance of each used which is stored for bookkeeping.
+* Ownership can be transferred
 # Use Case
-The use-case inspiring this implementation is in the context of issuance
+## Mint
 of a *voucher* representing a credit obligation of an *Issuer* or
 *Association of Issuers*.
-This voucher can be redeemed as payment for the products of the Issuer.
+* Owner can add minters and remove
  - A faucet contract would be a minter and choose the amount of tokens to mint and distribute to new _validated_ users.
  - The interface says the amount and is at the caller's discretion per contract call. _validation_ is outside of this contract.
 * A minter can remove itself
 * Minters can mint any amount
 The Issuer is the entity legally obligated to redeem the voucher as
 payment.
-Introducing demurrage on this vehicle discourages *withholding* the
+## Demurrage
-voucher, for example for speculative advantage.
+* Holding Tax (`demurrage`) is applied when a **mint** or **transfer**; (it can also be triggered explicitly)
  - Note that the token supply _stays the same_ but a virtual _balance output_ is created.
  - Updates `demurrageModifier` which represents the accumulated tax value and is an exponential decay step (of size `demurrage`) for each minute that has passed.
    - `demurrageModifier = (1-demurrage)^(minute_passed)` 
      - e.g. a `demurrage` of 2% after the 1st minute would be give a `demurrageModifier = (1-0.02)^1 = 0.98`.
      - e.g. a `demurrage` after the 2nd minute would be give a `demurrageModifier = (1-0.02)^2 = 0.9604`.
 * All client-facing values (_balance output_ , _transfer inputs_) are adjusted with `demurrageModifier`.
  - e.g. `_balance output_ = user_balance - user_balance * demurrageModifier`
 This also encourages increased *velocity* of voucher use.
-## Example
+## Redistribution
-Given:
+* One redistribution entry is added to storage for each `period`;
  - When `mint` is triggered, the new totalsupply is stored to the entry
  - When `transfer` is triggered, and the account did not yet participate in the `period`, the entry's participant count is incremented. 
 * Account must have "participated" in a period to be redistribution beneficiary.
 * Redistribution is applied when an account triggers a **transfer** for the first time in a new `period`;
  - Check if user has participated in `period`. (_active_ user heartbeat)
  - Each _active_ user balance in the `period` is increased by `(total supply at end of period * demurrageModifier ) / number_of_active_participants` via minting
  - Participation field is zeroed out for that user.
 * Fractions must be rounded down
  - Remainder is "dust" and should be sent to a dedicated Sink Token Address.
  - If no one is _active_ all taxes go to the Sink Token Address.
 - 10 voucher holders.
- A total supply of 1000 tokens.
+## Data structures
- Demurrage of 2% per 30 days (43200 minutes).
+* One word per `account`:
  - bits 000-071: value
  - bits 072-103: period
  - bits 104-255: (Unused)
 * One word per `redistributions` period:
  - bits 000-031: period
  - bits 032-103: supply
  - bits 104-139: participant count
  - bits 140-159: demurrage modifier
  - bits 160-254: (Unused)
  - bits     255: Set if individual redistribution amounts are fractions
- Redistribution period of 30 days (43200 minutes).
+### Notes
-If no trades are made, the resulting balances after one redistribution
+Accumulated demurrage modifier in `demurrageModifier` is 128 bit, but will be _truncated_ do 20 bits in `redistributions`. The 128 bit resolution is to used to reduce the impact of fractional drift of the long-term accumulation of the demurrage modifier. However, the demurrage snapshot values used in `redistributions` are parts-per-million and can be fully contained within a 20-bit value.
 period of every user would be 98 Vouchers.
 The Sink Address will have a balance of 20 vouchers after the same
 period.
-Note that after the redistribution the total of all balances will equal
+## QA
 the total minted amount.
-Note that all accounts holding such vouchers are effected by demurrage
+* Basic python tests in place
-(even the Sink Account, pending redistribution).
+* How to determine and generate sufficient test vectors, and how to adapt them to scripts.
 * Audit sources?
-# Smart contract
+## Known issues
-## Common interfaces
+* A `transferFrom` following an `approve` call, when called across period thresholds, may fail if margin to demurraged amount is insufficient.
 The smart contract is written in solidity, compatible with 0.8.x.
 It implements a number of interfaces both from the Ethereum (ERC)
 standards aswell as the Community Inclusion Currency contract interface
 suite.
 ### ERC standard interfaces
 - [ERC20 - Token Standard](https://eips.ethereum.org/EIPS/eip-20)
 - [ERC165 - Standard Interface
  Detection](https://eips.ethereum.org/EIPS/eip-165)
 - [ERC173 - Contract Ownership
  Standard](https://eips.ethereum.org/EIPS/eip-173)
 - [ERC5679 - Token Minting and Burning (as part of CIC.Minter and
  CIC.Burner)](https://eips.ethereum.org/EIPS/eip-5679)
 ### CIC interfaces
 - [Burner](https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Burner.sol)
 - [Expire](https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Expire.sol)
 - [Minter](https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Minter.sol)
 - [Seal](https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Seal.sol)
 - [Writer](https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Writer.sol)
 ## Dependencies
 The token contract uses the
 [ADBKMath](https://github.com/abdk-consulting/abdk-libraries-solidity/blob/master/ABDKMath64x64.sol)
 library to calculate exponentials.
 ## Permissions
 The smart contract defines three levels of access.
 1.  Voucher contract owner
 2.  Voucher minter
 3.  Voucher holder
 ### Contract owner
 When the contract is published to the network, the signer account of the
 publishing transaction will be the contract owner.
 Contract ownership can be changed by the owner using the **ERC173**
 standard interface.
 ### Minter
 A minter has access to mint vouchers, and to burn vouchers from its own
 balance.
 Only the contract owner may mint, and may add and remove minters.
 Minters may be added and removed using the **CIC Writer** interface, as
 long as the `WRITER_STATE` seal is not set. See [Sealing the
 contract](#seal_005fstate) for further details.
 The contract owner is automatically a minter.
 ### Holder
 Any address may hold vouchers, and transfer vouchers from their balance.
 Minters and the contract owner are automatically token holders.
 All token holders are subject to demurrage.
 ## Publishing the contract
 The contract is published with the following arguments:
 ‘`name`’  
 ERC20 voucher name
 ‘`symbol`’  
 ERC20 voucher symbol
 ‘`decimals`’  
 ERC20 decimal count
 ‘`decayLevel`’  
 Level of decay per minute. See [Specifying
 demurrage](#specifying_005fdemurrage) below for further details.
 ‘`periodMinutes`’  
 Number of minutes between each time the demurraged value can be
 withdrawn to the *Sink Account*. See [Withdrawing demurraged
 value](#withdrawing) below for further details. The period may not be
 altered.
 ‘`defaultSinkAddress`’  
 The initial *Sink Address*. The address may be altered as long as the
 `SINK_STATE` seal has not been set. See [Sealing the
 contract](#seal_005fstate) for further details.
 ### Specifying demurrage
 The *input parameter* to the contract is a 128-bit positive fixed-point
 number, where the most significant 64 bits represent the integer part,
 and the lower 64 bits represents the decimals part, each consecutive
 lesser bit halving the value of the previous bit.
 For example, The byte value `00000000 00000002 a0000000 00000000`,
 representing a zero-stripped binary value of $10.101$. This translates
 to the (base 10) decimal value $2.625$. The decimal part is calculated
 as, from left to right: $(1 * 0.5) + (0 * 0.25) + (1 * 0.125)$.
 #### Calculating the demurrage parameter
 The minute granularity of the demurrage value is calculating using the
 continuous decay function.
 For example, for a demurrage of 2% per 30 days (43200 minutes), the
 input value will be:
 $(1-0.02)^(1/43200) ~ 0.99999953234484737109$
 The decimal part of the fixed-point representation of this value is:
 `fffff8276fb8cfff`
 The input parameter becomes:
 `0000000000000000ffffa957014dc7ff`
 See [Tools](#tools) for additional help generating the necessary values.
 Note that attempting to publish a voucher contract with no (zero)
 demurrage will fail (if demurrage is not needed, use another contract).
 ## Using the contract
 ### Withdrawing demurrage
 After each redistribution period, the demurraged value of that period
 can be withdrawn to the currently defined *Sink Account*.
 The demurrage is calculated as from the total supply of voucher at the
 end of the period.
 Withdrawal should happen implicitly duing normal operation of the
 contract. See [Side-effects in state changes](#sideeffects).
 To explicitly credit the *Sink Address* with the demurrage value after a
 period has been exceeded, the `changePeriod()` (`8f1df6bc`) method can
 be called.
 ### Setting voucher expiry
 The effect of a voucher expiring is that all balances will be frozen,
 and all state changes affecting token balances will be blocked.
 Expiry is defined in terms of redistribution periods. For example, if
 the redistribution period is 30 days, and the expity is 3, then the
 voucher expires after 90 days.
 The expiry takes effect immediately when the redistribution period time
 has been exceeded.
 When the contract is published, no expiry is set.
 Expiry may be set after publishing using the `CIC.Expire` interface.
 If the `EXPIRE_STATE` seal has been set, expiry may not be changed
 further.
 ### Capping voucher supply
 The effect of a voucher supply cap is that all `CIC.Minter` calls will
 fail if the total supply after minting exceeds the defined supply cap.
 The supply cap still allows vouchers to be minted after `CIC.Burn`
 calls, provided that the previous condition holds.
 To apply the supply cap, the method `setMaxSupply(uint256) (6f8b44b0)`
 is used.
 ### Side-effects in state changes
 All state changes involving voucher values implicitly execute two core
 methods to ensure application of the demurrage and redistribution.
 The two methods are:
 `applyDemurrage() (731f237c)`  
 Calculates the demurrage modifier of all balances according to the
 current timestamp.
 `changePeriod() (8f1df6bc)`  
 If the previously executed period change does not match the current
 period, the period is changed, and the *Sink Address* is credited with
 the demurrage amount of the current total supply.
 Both of these methods are *noop* if no demurrage or withdrawal is
 pending, respectively.
 Examples of state changes that execute these methods include
 `ERC20.transfer(...)`, `ERC20.transferFrom(...)` and `CIC.mintTo(...)`.
 ### Sealing the contract
 Certain mutable core parameters of the contract can be *sealed*, meaning
 prevented from being modifier further.
 Sealing is executed using the `CIC.Seal` interface.
 The sealing of parameters is irreversible.
 The sealable parameters are[^1]:
 `WRITER_STATE`  
 The `CIC.Writer` interface is blocked. The effect of this is that no
 more changes may be made to which accounts have minter permission.
 `SINK_STATE`  
 After setting this seal, the *Sink Address* may not be changed.
 `EXPIRY_STATE`  
 Prevents future changes to the voucher expiry date[^2].
 `CAP_STATE`  
 Immediately prevents future voucher minting, regardless of permissions.
 ## Gas usage
 Gas usage is constant regardless of the amount of time passed between
 each execution of demurrage and redistribution period calculations.
 ## Caveats
 A `ERC20.transferFrom(...)` following an `ERC20.approve(...)` call, when
 called across period thresholds, may fail if margin to demurraged amount
 is insufficient.
 # Tools
 When installed as a python package, `erc20-demurrage-token` installs the
 `erc20-demurrage-token-publish` executable script, which can be used to
 publish smart contract instances.
 While the man page for the tool can be referred to for general
 information of the tool usage, two argument flags warrant special
 mention in the context of this documentation.
 `--demurrage-level`  
 The percentage of demurrage in terms of the redistribution period,
 defined as parts-per-million.
 `--redistribution-period`  
 A numeric value denominated in *minutes* to define the redistribution
 period of the voucher demurrage.
 For example, to define a 2% demurrage value for a redistribution period
 of 30 days (43200 minutes), the argument to the argument flags would be:
    erc20-demurrage-token-publish --demurrage-level 20000 --redistribution-period 43200 ...
 ## Calculating fixed-point values
 The `erc20-demurrage-token` package installs the python package `dexif`
 as part of its dependencies.
 This package in turn provides an epinymous command-line tool (`dexif`)
 which converts decimal values to a 128-bit fixed-point value expected by
 the contract constructor.
 An example:
    $ dexif 123.456
    7b74bc6a7ef9db23ff
    $ dexif -x 7b74bc6a7ef9db23ff
    123.456
 ## Contract interaction with chainlib-eth
 All smart contract tests are implementing using
 [chainlib-eth](https://git.defalsify.org/chainlib-eth) from the
 chaintool suite.
 The `eth-encode` tool from the `chainlib-eth` python package may be a
 convenient way to interact with contract features.
 Some examples include:
    # explicitly call changePeriod()
    $ eth-encode --mode tx --signature changePeriod -e <contract_address> -y <key_file> ...
    # Set the sink address seal (The integer value of the SINK_STATE flag is 2 at the time of writing)
    $ eth-encode --mode tx --signature seal  -e <contract_address> -y <key_file> ... u:2
    # Query current sink address of contract
    $ eth-encode --mode call --signature sinkAddress -e <contract_address> ...
 [^1]: Please refer to the contract source code for the numeric values of
    the state flags
 [^2]: The `EXPIRY_STATE` is implicitly set after expiration.
--- a/8
+++ b/8
@ -1,8 +0,0 @@
 - 0.1.3
 	* Snapshot supply for crossed redistribution thresholds before minting new tokens.
 - 0.1.4
 	* Implement natural logarithm 
 - 0.1.5
 	* Port changes from SingleNocap to SingleCap
 - 0.2.0
 	* Make decay resolutions configurable, to support high levels of decay.
--- a/1
+++ b/1
@ -1 +0,0 @@
 0.2.0
--- a/doc/texinfo/Makefile
+++ b/doc/texinfo/Makefile
@ -1,4 +0,0 @@
 doc:
 	makeinfo --html -o build index.texi
 readme:
 	makeinfo --docbook -o build/docbook.xml index.texi
--- a/doc/texinfo/contract.texi
+++ b/doc/texinfo/contract.texi
@ -1,221 +0,0 @@
@node contract
@chapter Smart contract
@section Common interfaces
 The smart contract is written in solidity, compatible with 0.8.x.
 It implements a number of interfaces both from the Ethereum (ERC) standards aswell as the Community Inclusion Currency contract interface suite.
@subsection ERC standard interfaces
@itemize @bullet
@item
@uref{https://eips.ethereum.org/EIPS/eip-20, ERC20 - Token Standard}
@item
@uref{https://eips.ethereum.org/EIPS/eip-165, ERC165 - Standard Interface Detection}
@item
@uref{https://eips.ethereum.org/EIPS/eip-173, ERC173 - Contract Ownership Standard}
@item
@uref{https://eips.ethereum.org/EIPS/eip-5679, ERC5679 - Token Minting and Burning (as part of CIC.Minter and CIC.Burner)}
@end itemize
@subsection CIC interfaces
@itemize @bullet
@item
@uref{https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Burner.sol, Burner}
@item
@uref{https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Expire.sol, Expire}
@item
@uref{https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Minter.sol, Minter}
@item
@uref{https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Seal.sol, Seal}
@item
@uref{https://git.grassecon.net/cicnet/cic-contracts/src/branch/master/solidity/Writer.sol, Writer}
@end itemize
@section Dependencies
 The token contract uses the @url{https://github.com/abdk-consulting/abdk-libraries-solidity/blob/master/ABDKMath64x64.sol, ADBKMath} library to calculate exponentials.
@section Permissions
 The smart contract defines three levels of access.
@enumerate
@item Voucher contract owner
@item Voucher minter
@item Voucher holder
@end enumerate
@subsection Contract owner
 When the contract is published to the network, the signer account of the publishing transaction will be the contract owner.
 Contract ownership can be changed by the owner using the @strong{ERC173} standard interface.
@subsection Minter
 A minter has access to mint vouchers, and to burn vouchers from its own balance.
 Only the contract owner may mint, and may add and remove minters. Minters may be added and removed using the @strong{CIC Writer} interface, as long as the @code{WRITER_STATE} seal is not set. @xref{seal_state, Sealing the contract} for further details.
 The contract owner is automatically a minter.
@subsection Holder
 Any address may hold vouchers, and transfer vouchers from their balance.
 Minters and the contract owner are automatically token holders.
 All token holders are subject to demurrage.
@section Publishing the contract
 The contract is published with the following arguments:
@table @samp
@item name
 ERC20 voucher name
@item symbol
 ERC20 voucher symbol
@item decimals
 ERC20 decimal count
@item decayLevel
 Level of decay per minute. @xref{specifying_demurrage, Specifying demurrage} below for further details.
@item periodMinutes
 Number of minutes between each time the demurraged value can be withdrawn to the @emph{Sink Account}. @xref{withdrawing, Withdrawing demurraged value} below for further details. The period may not be altered. 
@item defaultSinkAddress
 The initial @emph{Sink Address}. The address may be altered as long as the @code{SINK_STATE} seal has not been set. @xref{seal_state, Sealing the contract} for further details.
@end table
@node specifying_demurrage
@subsection Specifying demurrage
 The @emph{input parameter} to the contract is a 128-bit positive fixed-point number, where the most significant 64 bits represent the integer part, and the lower 64 bits represents the decimals part, each consecutive lesser bit halving the value of the previous bit.
 For example, The byte value @code{00000000 00000002 a0000000 00000000}, representing a zero-stripped binary value of @math{10.101}. This translates to the (base 10) decimal value @math{2.625}. The decimal part is calculated as, from left to right: @math{(1 * 0.5) + (0 * 0.25) + (1 * 0.125)}.
@subsubsection Calculating the demurrage parameter
 The minute granularity of the demurrage value is calculating using the continuous decay function.
 For example, for a demurrage of 2% per 30 days (43200 minutes), the input value will be:
@math{(1-0.02)^(1/43200) ~ 0.99999953234484737109} 
 The decimal part of the fixed-point representation of this value is:
@code{fffff8276fb8cfff}
 The input parameter becomes:
@code{0000000000000000ffffa957014dc7ff}
@xref{tools, Tools} for additional help generating the necessary values.
 Note that attempting to publish a voucher contract with no (zero) demurrage will fail (if demurrage is not needed, use another contract).
@section Using the contract
@node withdrawing
@subsection Withdrawing demurrage
 After each redistribution period, the demurraged value of that period can be withdrawn to the currently defined @emph{Sink Account}.
 The demurrage is calculated as from the total supply of voucher at the end of the period.
 Withdrawal should happen implicitly duing normal operation of the contract. @xref{sideeffects, Side-effects in state changes}.
 To explicitly credit the @emph{Sink Address} with the demurrage value after a period has been exceeded, the @code{changePeriod()} (@code{8f1df6bc}) method can be called.
@node expiry
@subsection Setting voucher expiry
 The effect of a voucher expiring is that all balances will be frozen, and all state changes affecting token balances will be blocked.
 Expiry is defined in terms of redistribution periods. For example, if the redistribution period is 30 days, and the expity is 3, then the voucher expires after 90 days.
 The expiry takes effect immediately when the redistribution period time has been exceeded.
 When the contract is published, no expiry is set.
 Expiry may be set after publishing using the @code{CIC.Expire} interface.
 If the @code{EXPIRE_STATE} seal has been set, expiry may not be changed further.
@node supply
@subsection Capping voucher supply
 The effect of a voucher supply cap is that all @code{CIC.Minter} calls will fail if the total supply after minting exceeds the defined supply cap.
 The supply cap still allows vouchers to be minted after @code{CIC.Burn} calls, provided that the previous condition holds.
 To apply the supply cap, the method @code{setMaxSupply(uint256) (6f8b44b0)} is used.
@node sideeffects
@subsection Side-effects in state changes
 All state changes involving voucher values implicitly execute two core methods to ensure application of the demurrage and redistribution.
 The two methods are:
@table @code
@item applyDemurrage() (731f237c)
 Calculates the demurrage modifier of all balances according to the current timestamp.
@item changePeriod() (8f1df6bc)
 If the previously executed period change does not match the current period, the period is changed, and the @emph{Sink Address} is credited with the demurrage amount of the current total supply.
@end table
 Both of these methods are @emph{noop} if no demurrage or withdrawal is pending, respectively.
 Examples of state changes that execute these methods include @code{ERC20.transfer(...)}, @code{ERC20.transferFrom(...)} and @code{CIC.mintTo(...)}.
@node seal_state
@subsection Sealing the contract
 Certain mutable core parameters of the contract can be @emph{sealed}, meaning prevented from being modifier further.
 Sealing is executed using the @code{CIC.Seal} interface.
 The sealing of parameters is irreversible.
 The sealable parameters are@footnote{Please refer to the contract source code for the numeric values of the state flags}:
@table @code
@item WRITER_STATE
 The @code{CIC.Writer} interface is blocked. The effect of this is that no more changes may be made to which accounts have minter permission.
@item SINK_STATE
 After setting this seal, the @emph{Sink Address} may not be changed.
@item EXPIRY_STATE
 Prevents future changes to the voucher expiry date@footnote{The @code{EXPIRY_STATE} is implicitly set after expiration.}.
@item CAP_STATE
 Immediately prevents future voucher minting, regardless of permissions.
@end table
@section Gas usage
 Gas usage is constant regardless of the amount of time passed between each execution of demurrage and redistribution period calculations.
@section Caveats
 A @code{ERC20.transferFrom(...)} following an @code{ERC20.approve(...)} call, when called across period thresholds, may fail if margin to demurraged amount is insufficient.
--- a/doc/texinfo/index.texi
+++ b/doc/texinfo/index.texi
@ -1,29 +0,0 @@
 \input texinfo
@settitle ERC20 Demurrage Token
@copying
 Released 2023 under AGPL3
@end copying
@titlepage
@title ERC20 Demurrage Token
@author Louis Holbrook
@end titlepage
@c
@contents
@ifnottex
@node Top
@top Introduction
@end ifnottex
@menu
 * overview ::
 * instructions :
@end menu
@include overview.texi
@include usecase.texi
@include contract.texi
@include tools.texi
--- a/doc/texinfo/overview.texi
+++ b/doc/texinfo/overview.texi
@ -1,47 +0,0 @@
@node overview
@chapter Overview
@verbatim
 de-mur-rage
 1: the detention of a ship by the freighter beyond the time allowed for loading, unloading, or sailing
 2: a charge for detaining a ship, freight car, or truck
@end verbatim
 This ERC20 smart contract implementation for the EVM imposes a demurrage on all held token balances.
 The demurrage is a continuous value @emph{decay}, subtracted from all balances every minute.
 Also. a time period is defined at contract creation time at which the difference between held balances and the demurrage can be withdrawn to a pre-selected address, which in turn can redistribute that token value.
 In short: Everyone is taxed a little something every minute, and every so often a decision is made on how to redistribute that tax.
@section Features
@itemize
@item Continuous decay of all balances.
@item Capture and redistribution of decayed balances.
@item Per-minute decay resolution.
@item Minting and burning of vouchers.
@item Grant and revoke access to mint and burn vouchers.
@item Voucher expiration (modifiable anytime after publishing).
@item Supply cap (modifiable anytime after publishing).
@item Constant gas usage across exponential calculations.
@end itemize
@section Nomenclature
@table @samp
@item Demurrage
 A percentage of token supply that will continuously be removed.
@item Demurrage Period
 A period of time denominated in minutes after which demurraged amounts are available for redistribution.
@item Sink Account
 The intermediate beneficiary of the demurraged amount, which may or may not redistribute value.
@item Base balance
 The inflated balance of each used which is stored for bookkeeping.
@end table
--- a/doc/texinfo/tools.texi
+++ b/doc/texinfo/tools.texi
@ -1,57 +0,0 @@
@node tools
@chapter Tools
 When installed as a python package, @code{erc20-demurrage-token} installs the @code{erc20-demurrage-token-publish} executable script, which can be used to publish smart contract instances.
 While the man page for the tool can be referred to for general information of the tool usage, two argument flags warrant special mention in the context of this documentation.
@table @code
@item --demurrage-level
 The percentage of demurrage in terms of the redistribution period, defined as parts-per-million.
@item --redistribution-period
 A numeric value denominated in @emph{minutes} to define the redistribution period of the voucher demurrage.
@end table
 For example, to define a 2% demurrage value for a redistribution period of 30 days (43200 minutes), the argument to the argument flags would be:
@verbatim
 erc20-demurrage-token-publish --demurrage-level 20000 --redistribution-period 43200 ...
@end verbatim
@section Calculating fixed-point values
 The @code{erc20-demurrage-token} package installs the python package @code{dexif} as part of its dependencies.
 This package in turn provides an epinymous command-line tool (@code{dexif}) which converts decimal values to a 128-bit fixed-point value expected by the contract constructor.
 An example:
@example
 $ dexif 123.456
 7b74bc6a7ef9db23ff
 $ dexif -x 7b74bc6a7ef9db23ff
 123.456
@end example
@section Contract interaction with chainlib-eth
 All smart contract tests are implementing using @url{https://git.defalsify.org/chainlib-eth, chainlib-eth} from the chaintool suite.
 The @code{eth-encode} tool from the @code{chainlib-eth} python package may be a convenient way to interact with contract features.
 Some examples include:
@example
 # explicitly call changePeriod()
 $ eth-encode --mode tx --signature changePeriod -e <contract_address> -y <key_file> ...
 # Set the sink address seal (The integer value of the SINK_STATE flag is 2 at the time of writing)
 $ eth-encode --mode tx --signature seal  -e <contract_address> -y <key_file> ... u:2
 # Query current sink address of contract
 $ eth-encode --mode call --signature sinkAddress -e <contract_address> ...
@end example
--- a/doc/texinfo/usecase.texi
+++ b/doc/texinfo/usecase.texi
@ -1,32 +0,0 @@
@node usecase
@chapter Use Case
 The use-case inspiring this implementation is in the context of issuance of a @emph{voucher} representing a credit obligation of an @emph{Issuer} or @emph{Association of Issuers}.
 This voucher can be redeemed as payment for the products of the Issuer.
 The Issuer is the entity legally obligated to redeem the voucher as payment.
 Introducing demurrage on this vehicle discourages @emph{withholding} the voucher, for example for speculative advantage.
 This also encourages increased @emph{velocity} of voucher use.
@section Example
 Given:
@itemize
@item 10 voucher holders.
@item A total supply of 1000 tokens.
@item Demurrage of 2% per 30 days (43200 minutes).
@item Redistribution period of 30 days (43200 minutes).
@end itemize
 If no trades are made, the resulting balances after one redistribution period of every user would be 98 Vouchers.
 The Sink Address will have a balance of 20 vouchers after the same period.
 Note that after the redistribution the total of all balances will equal the total minted amount. 
 Note that all accounts holding such vouchers are effected by demurrage (even the Sink Account, pending redistribution).
--- a/python/CHANGELOG
+++ b/python/CHANGELOG
@ -1,26 +1,3 @@
 - 0.5.5
 	* Make allowance method public
 - 0.5.4
 	* Add Transfer() event emission to sweep() in contract
 - 0.5.3
 	* Add texinfo documentation
 	* Add man page for publish tool
 - 0.5.2
 	* Update ERC165 interface response for Expire
 	* Add ExpiryChange event
 - 0.5.1
 	* Update ERC165 interface responses
 - 0.5.0
 	* Change license
 - 0.4.2
 	* Correct burn interface implementation
 - 0.4.1
 	* Eliminate solidity compiler warnings
 - 0.4.0
 	* Rename taxLevel to decayLevel in contract
 	* Add sweep contract method to fully empty one account into another
 - 0.3.6
 	* Reinstate owner as minter by default
 - 0.3.0
 	* Smart contracts use abdk math libraries, all exponential operations are static gas cost
 	* Add expiry features, after which balances are frozen and no more transfers or demurrage will occur
@ -28,12 +5,6 @@
 	* Deployer script now takes demurrage amount as ppm instead of literal growth fraction
 	* Retire old multi and cap contracts
 	* Replace contract bitfields for redistributions with structs
 - 0.2.0
 	* Add token burn function
 	* Fix gas leak when calculating decay on period change
 	* Remove all but SingleNocap contract in make install
 	* Make approve explicitly set value
 	* Add increaseAllowance and decreaseAllowance methods
 - 0.1.1
 	* Settable demurrage steps for apply demurrage cli tool
 - 0.1.0
--- a/python/LICENSE
+++ b/python/LICENSE
@ -1,661 +0,0 @@
                    GNU AFFERO GENERAL PUBLIC LICENSE
                       Version 3, 19 November 2007
 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
                            Preamble
  The GNU Affero General Public License is a free, copyleft license for
 software and other kinds of works, specifically designed to ensure
 cooperation with the community in the case of network server software.
  The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
 our General Public Licenses are intended to guarantee your freedom to
 share and change all versions of a program--to make sure it remains free
 software for all its users.
  When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
 have the freedom to distribute copies of free software (and charge for
 them if you wish), that you receive source code or can get it if you
 want it, that you can change the software or use pieces of it in new
 free programs, and that you know you can do these things.
  Developers that use our General Public Licenses protect your rights
 with two steps: (1) assert copyright on the software, and (2) offer
 you this License which gives you legal permission to copy, distribute
 and/or modify the software.
  A secondary benefit of defending all users' freedom is that
 improvements made in alternate versions of the program, if they
 receive widespread use, become available for other developers to
 incorporate.  Many developers of free software are heartened and
 encouraged by the resulting cooperation.  However, in the case of
 software used on network servers, this result may fail to come about.
 The GNU General Public License permits making a modified version and
 letting the public access it on a server without ever releasing its
 source code to the public.
  The GNU Affero General Public License is designed specifically to
 ensure that, in such cases, the modified source code becomes available
 to the community.  It requires the operator of a network server to
 provide the source code of the modified version running there to the
 users of that server.  Therefore, public use of a modified version, on
 a publicly accessible server, gives the public access to the source
 code of the modified version.
  An older license, called the Affero General Public License and
 published by Affero, was designed to accomplish similar goals.  This is
 a different license, not a version of the Affero GPL, but Affero has
 released a new version of the Affero GPL which permits relicensing under
 this license.
  The precise terms and conditions for copying, distribution and
 modification follow.
                       TERMS AND CONDITIONS
  0. Definitions.
  "This License" refers to version 3 of the GNU Affero General Public License.
  "Copyright" also means copyright-like laws that apply to other kinds of
 works, such as semiconductor masks.
  "The Program" refers to any copyrightable work licensed under this
 License.  Each licensee is addressed as "you".  "Licensees" and
 "recipients" may be individuals or organizations.
  To "modify" a work means to copy from or adapt all or part of the work
 in a fashion requiring copyright permission, other than the making of an
 exact copy.  The resulting work is called a "modified version" of the
 earlier work or a work "based on" the earlier work.
  A "covered work" means either the unmodified Program or a work based
 on the Program.
  To "propagate" a work means to do anything with it that, without
 permission, would make you directly or secondarily liable for
 infringement under applicable copyright law, except executing it on a
 computer or modifying a private copy.  Propagation includes copying,
 distribution (with or without modification), making available to the
 public, and in some countries other activities as well.
  To "convey" a work means any kind of propagation that enables other
 parties to make or receive copies.  Mere interaction with a user through
 a computer network, with no transfer of a copy, is not conveying.
  An interactive user interface displays "Appropriate Legal Notices"
 to the extent that it includes a convenient and prominently visible
 feature that (1) displays an appropriate copyright notice, and (2)
 tells the user that there is no warranty for the work (except to the
 extent that warranties are provided), that licensees may convey the
 work under this License, and how to view a copy of this License.  If
 the interface presents a list of user commands or options, such as a
 menu, a prominent item in the list meets this criterion.
  1. Source Code.
  The "source code" for a work means the preferred form of the work
 for making modifications to it.  "Object code" means any non-source
 form of a work.
  A "Standard Interface" means an interface that either is an official
 standard defined by a recognized standards body, or, in the case of
 interfaces specified for a particular programming language, one that
 is widely used among developers working in that language.
  The "System Libraries" of an executable work include anything, other
 than the work as a whole, that (a) is included in the normal form of
 packaging a Major Component, but which is not part of that Major
 Component, and (b) serves only to enable use of the work with that
 Major Component, or to implement a Standard Interface for which an
 implementation is available to the public in source code form.  A
 "Major Component", in this context, means a major essential component
 (kernel, window system, and so on) of the specific operating system
 (if any) on which the executable work runs, or a compiler used to
 produce the work, or an object code interpreter used to run it.
  The "Corresponding Source" for a work in object code form means all
 the source code needed to generate, install, and (for an executable
 work) run the object code and to modify the work, including scripts to
 control those activities.  However, it does not include the work's
 System Libraries, or general-purpose tools or generally available free
 programs which are used unmodified in performing those activities but
 which are not part of the work.  For example, Corresponding Source
 includes interface definition files associated with source files for
 the work, and the source code for shared libraries and dynamically
 linked subprograms that the work is specifically designed to require,
 such as by intimate data communication or control flow between those
 subprograms and other parts of the work.
  The Corresponding Source need not include anything that users
 can regenerate automatically from other parts of the Corresponding
 Source.
  The Corresponding Source for a work in source code form is that
 same work.
  2. Basic Permissions.
  All rights granted under this License are granted for the term of
 copyright on the Program, and are irrevocable provided the stated
 conditions are met.  This License explicitly affirms your unlimited
 permission to run the unmodified Program.  The output from running a
 covered work is covered by this License only if the output, given its
 content, constitutes a covered work.  This License acknowledges your
 rights of fair use or other equivalent, as provided by copyright law.
  You may make, run and propagate covered works that you do not
 convey, without conditions so long as your license otherwise remains
 in force.  You may convey covered works to others for the sole purpose
 of having them make modifications exclusively for you, or provide you
 with facilities for running those works, provided that you comply with
 the terms of this License in conveying all material for which you do
 not control copyright.  Those thus making or running the covered works
 for you must do so exclusively on your behalf, under your direction
 and control, on terms that prohibit them from making any copies of
 your copyrighted material outside their relationship with you.
  Conveying under any other circumstances is permitted solely under
 the conditions stated below.  Sublicensing is not allowed; section 10
 makes it unnecessary.
  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
  No covered work shall be deemed part of an effective technological
 measure under any applicable law fulfilling obligations under article
 11 of the WIPO copyright treaty adopted on 20 December 1996, or
 similar laws prohibiting or restricting circumvention of such
 measures.
  When you convey a covered work, you waive any legal power to forbid
 circumvention of technological measures to the extent such circumvention
 is effected by exercising rights under this License with respect to
 the covered work, and you disclaim any intention to limit operation or
 modification of the work as a means of enforcing, against the work's
 users, your or third parties' legal rights to forbid circumvention of
 technological measures.
  4. Conveying Verbatim Copies.
  You may convey verbatim copies of the Program's source code as you
 receive it, in any medium, provided that you conspicuously and
 appropriately publish on each copy an appropriate copyright notice;
 keep intact all notices stating that this License and any
 non-permissive terms added in accord with section 7 apply to the code;
 keep intact all notices of the absence of any warranty; and give all
 recipients a copy of this License along with the Program.
  You may charge any price or no price for each copy that you convey,
 and you may offer support or warranty protection for a fee.
  5. Conveying Modified Source Versions.
  You may convey a work based on the Program, or the modifications to
 produce it from the Program, in the form of source code under the
 terms of section 4, provided that you also meet all of these conditions:
    a) The work must carry prominent notices stating that you modified
    it, and giving a relevant date.
    b) The work must carry prominent notices stating that it is
    released under this License and any conditions added under section
    7.  This requirement modifies the requirement in section 4 to
    "keep intact all notices".
    c) You must license the entire work, as a whole, under this
    License to anyone who comes into possession of a copy.  This
    License will therefore apply, along with any applicable section 7
    additional terms, to the whole of the work, and all its parts,
    regardless of how they are packaged.  This License gives no
    permission to license the work in any other way, but it does not
    invalidate such permission if you have separately received it.
    d) If the work has interactive user interfaces, each must display
    Appropriate Legal Notices; however, if the Program has interactive
    interfaces that do not display Appropriate Legal Notices, your
    work need not make them do so.
  A compilation of a covered work with other separate and independent
 works, which are not by their nature extensions of the covered work,
 and which are not combined with it such as to form a larger program,
 in or on a volume of a storage or distribution medium, is called an
 "aggregate" if the compilation and its resulting copyright are not
 used to limit the access or legal rights of the compilation's users
 beyond what the individual works permit.  Inclusion of a covered work
 in an aggregate does not cause this License to apply to the other
 parts of the aggregate.
  6. Conveying Non-Source Forms.
  You may convey a covered work in object code form under the terms
 of sections 4 and 5, provided that you also convey the
 machine-readable Corresponding Source under the terms of this License,
 in one of these ways:
    a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
    Corresponding Source fixed on a durable physical medium
    customarily used for software interchange.
    b) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by a
    written offer, valid for at least three years and valid for as
    long as you offer spare parts or customer support for that product
    model, to give anyone who possesses the object code either (1) a
    copy of the Corresponding Source for all the software in the
    product that is covered by this License, on a durable physical
    medium customarily used for software interchange, for a price no
    more than your reasonable cost of physically performing this
    conveying of source, or (2) access to copy the
    Corresponding Source from a network server at no charge.
    c) Convey individual copies of the object code with a copy of the
    written offer to provide the Corresponding Source.  This
    alternative is allowed only occasionally and noncommercially, and
    only if you received the object code with such an offer, in accord
    with subsection 6b.
    d) Convey the object code by offering access from a designated
    place (gratis or for a charge), and offer equivalent access to the
    Corresponding Source in the same way through the same place at no
    further charge.  You need not require recipients to copy the
    Corresponding Source along with the object code.  If the place to
    copy the object code is a network server, the Corresponding Source
    may be on a different server (operated by you or a third party)
    that supports equivalent copying facilities, provided you maintain
    clear directions next to the object code saying where to find the
    Corresponding Source.  Regardless of what server hosts the
    Corresponding Source, you remain obligated to ensure that it is
    available for as long as needed to satisfy these requirements.
    e) Convey the object code using peer-to-peer transmission, provided
    you inform other peers where the object code and Corresponding
    Source of the work are being offered to the general public at no
    charge under subsection 6d.
  A separable portion of the object code, whose source code is excluded
 from the Corresponding Source as a System Library, need not be
 included in conveying the object code work.
  A "User Product" is either (1) a "consumer product", which means any
 tangible personal property which is normally used for personal, family,
 or household purposes, or (2) anything designed or sold for incorporation
 into a dwelling.  In determining whether a product is a consumer product,
 doubtful cases shall be resolved in favor of coverage.  For a particular
 product received by a particular user, "normally used" refers to a
 typical or common use of that class of product, regardless of the status
 of the particular user or of the way in which the particular user
 actually uses, or expects or is expected to use, the product.  A product
 is a consumer product regardless of whether the product has substantial
 commercial, industrial or non-consumer uses, unless such uses represent
 the only significant mode of use of the product.
  "Installation Information" for a User Product means any methods,
 procedures, authorization keys, or other information required to install
 and execute modified versions of a covered work in that User Product from
 a modified version of its Corresponding Source.  The information must
 suffice to ensure that the continued functioning of the modified object
 code is in no case prevented or interfered with solely because
 modification has been made.
  If you convey an object code work under this section in, or with, or
 specifically for use in, a User Product, and the conveying occurs as
 part of a transaction in which the right of possession and use of the
 User Product is transferred to the recipient in perpetuity or for a
 fixed term (regardless of how the transaction is characterized), the
 Corresponding Source conveyed under this section must be accompanied
 by the Installation Information.  But this requirement does not apply
 if neither you nor any third party retains the ability to install
 modified object code on the User Product (for example, the work has
 been installed in ROM).
  The requirement to provide Installation Information does not include a
 requirement to continue to provide support service, warranty, or updates
 for a work that has been modified or installed by the recipient, or for
 the User Product in which it has been modified or installed.  Access to a
 network may be denied when the modification itself materially and
 adversely affects the operation of the network or violates the rules and
 protocols for communication across the network.
  Corresponding Source conveyed, and Installation Information provided,
 in accord with this section must be in a format that is publicly
 documented (and with an implementation available to the public in
 source code form), and must require no special password or key for
 unpacking, reading or copying.
  7. Additional Terms.
  "Additional permissions" are terms that supplement the terms of this
 License by making exceptions from one or more of its conditions.
 Additional permissions that are applicable to the entire Program shall
 be treated as though they were included in this License, to the extent
 that they are valid under applicable law.  If additional permissions
 apply only to part of the Program, that part may be used separately
 under those permissions, but the entire Program remains governed by
 this License without regard to the additional permissions.
  When you convey a copy of a covered work, you may at your option
 remove any additional permissions from that copy, or from any part of
 it.  (Additional permissions may be written to require their own
 removal in certain cases when you modify the work.)  You may place
 additional permissions on material, added by you to a covered work,
 for which you have or can give appropriate copyright permission.
  Notwithstanding any other provision of this License, for material you
 add to a covered work, you may (if authorized by the copyright holders of
 that material) supplement the terms of this License with terms:
    a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or
    b) Requiring preservation of specified reasonable legal notices or
    author attributions in that material or in the Appropriate Legal
    Notices displayed by works containing it; or
    c) Prohibiting misrepresentation of the origin of that material, or
    requiring that modified versions of such material be marked in
    reasonable ways as different from the original version; or
    d) Limiting the use for publicity purposes of names of licensors or
    authors of the material; or
    e) Declining to grant rights under trademark law for use of some
    trade names, trademarks, or service marks; or
    f) Requiring indemnification of licensors and authors of that
    material by anyone who conveys the material (or modified versions of
    it) with contractual assumptions of liability to the recipient, for
    any liability that these contractual assumptions directly impose on
    those licensors and authors.
  All other non-permissive additional terms are considered "further
 restrictions" within the meaning of section 10.  If the Program as you
 received it, or any part of it, contains a notice stating that it is
 governed by this License along with a term that is a further
 restriction, you may remove that term.  If a license document contains
 a further restriction but permits relicensing or conveying under this
 License, you may add to a covered work material governed by the terms
 of that license document, provided that the further restriction does
 not survive such relicensing or conveying.
  If you add terms to a covered work in accord with this section, you
 must place, in the relevant source files, a statement of the
 additional terms that apply to those files, or a notice indicating
 where to find the applicable terms.
  Additional terms, permissive or non-permissive, may be stated in the
 form of a separately written license, or stated as exceptions;
 the above requirements apply either way.
  8. Termination.
  You may not propagate or modify a covered work except as expressly
 provided under this License.  Any attempt otherwise to propagate or
 modify it is void, and will automatically terminate your rights under
 this License (including any patent licenses granted under the third
 paragraph of section 11).
  However, if you cease all violation of this License, then your
 license from a particular copyright holder is reinstated (a)
 provisionally, unless and until the copyright holder explicitly and
 finally terminates your license, and (b) permanently, if the copyright
 holder fails to notify you of the violation by some reasonable means
 prior to 60 days after the cessation.
  Moreover, your license from a particular copyright holder is
 reinstated permanently if the copyright holder notifies you of the
 violation by some reasonable means, this is the first time you have
 received notice of violation of this License (for any work) from that
 copyright holder, and you cure the violation prior to 30 days after
 your receipt of the notice.
  Termination of your rights under this section does not terminate the
 licenses of parties who have received copies or rights from you under
 this License.  If your rights have been terminated and not permanently
 reinstated, you do not qualify to receive new licenses for the same
 material under section 10.
  9. Acceptance Not Required for Having Copies.
  You are not required to accept this License in order to receive or
 run a copy of the Program.  Ancillary propagation of a covered work
 occurring solely as a consequence of using peer-to-peer transmission
 to receive a copy likewise does not require acceptance.  However,
 nothing other than this License grants you permission to propagate or
 modify any covered work.  These actions infringe copyright if you do
 not accept this License.  Therefore, by modifying or propagating a
 covered work, you indicate your acceptance of this License to do so.
  10. Automatic Licensing of Downstream Recipients.
  Each time you convey a covered work, the recipient automatically
 receives a license from the original licensors, to run, modify and
 propagate that work, subject to this License.  You are not responsible
 for enforcing compliance by third parties with this License.
  An "entity transaction" is a transaction transferring control of an
 organization, or substantially all assets of one, or subdividing an
 organization, or merging organizations.  If propagation of a covered
 work results from an entity transaction, each party to that
 transaction who receives a copy of the work also receives whatever
 licenses to the work the party's predecessor in interest had or could
 give under the previous paragraph, plus a right to possession of the
 Corresponding Source of the work from the predecessor in interest, if
 the predecessor has it or can get it with reasonable efforts.
  You may not impose any further restrictions on the exercise of the
 rights granted or affirmed under this License.  For example, you may
 not impose a license fee, royalty, or other charge for exercise of
 rights granted under this License, and you may not initiate litigation
 (including a cross-claim or counterclaim in a lawsuit) alleging that
 any patent claim is infringed by making, using, selling, offering for
 sale, or importing the Program or any portion of it.
  11. Patents.
  A "contributor" is a copyright holder who authorizes use under this
 License of the Program or a work on which the Program is based.  The
 work thus licensed is called the contributor's "contributor version".
  A contributor's "essential patent claims" are all patent claims
 owned or controlled by the contributor, whether already acquired or
 hereafter acquired, that would be infringed by some manner, permitted
 by this License, of making, using, or selling its contributor version,
 but do not include claims that would be infringed only as a
 consequence of further modification of the contributor version.  For
 purposes of this definition, "control" includes the right to grant
 patent sublicenses in a manner consistent with the requirements of
 this License.
  Each contributor grants you a non-exclusive, worldwide, royalty-free
 patent license under the contributor's essential patent claims, to
 make, use, sell, offer for sale, import and otherwise run, modify and
 propagate the contents of its contributor version.
  In the following three paragraphs, a "patent license" is any express
 agreement or commitment, however denominated, not to enforce a patent
 (such as an express permission to practice a patent or covenant not to
 sue for patent infringement).  To "grant" such a patent license to a
 party means to make such an agreement or commitment not to enforce a
 patent against the party.
  If you convey a covered work, knowingly relying on a patent license,
 and the Corresponding Source of the work is not available for anyone
 to copy, free of charge and under the terms of this License, through a
 publicly available network server or other readily accessible means,
 then you must either (1) cause the Corresponding Source to be so
 available, or (2) arrange to deprive yourself of the benefit of the
 patent license for this particular work, or (3) arrange, in a manner
 consistent with the requirements of this License, to extend the patent
 license to downstream recipients.  "Knowingly relying" means you have
 actual knowledge that, but for the patent license, your conveying the
 covered work in a country, or your recipient's use of the covered work
 in a country, would infringe one or more identifiable patents in that
 country that you have reason to believe are valid.
  If, pursuant to or in connection with a single transaction or
 arrangement, you convey, or propagate by procuring conveyance of, a
 covered work, and grant a patent license to some of the parties
 receiving the covered work authorizing them to use, propagate, modify
 or convey a specific copy of the covered work, then the patent license
 you grant is automatically extended to all recipients of the covered
 work and works based on it.
  A patent license is "discriminatory" if it does not include within
 the scope of its coverage, prohibits the exercise of, or is
 conditioned on the non-exercise of one or more of the rights that are
 specifically granted under this License.  You may not convey a covered
 work if you are a party to an arrangement with a third party that is
 in the business of distributing software, under which you make payment
 to the third party based on the extent of your activity of conveying
 the work, and under which the third party grants, to any of the
 parties who would receive the covered work from you, a discriminatory
 patent license (a) in connection with copies of the covered work
 conveyed by you (or copies made from those copies), or (b) primarily
 for and in connection with specific products or compilations that
 contain the covered work, unless you entered into that arrangement,
 or that patent license was granted, prior to 28 March 2007.
  Nothing in this License shall be construed as excluding or limiting
 any implied license or other defenses to infringement that may
 otherwise be available to you under applicable patent law.
  12. No Surrender of Others' Freedom.
  If conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
 excuse you from the conditions of this License.  If you cannot convey a
 covered work so as to satisfy simultaneously your obligations under this
 License and any other pertinent obligations, then as a consequence you may
 not convey it at all.  For example, if you agree to terms that obligate you
 to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.
  13. Remote Network Interaction; Use with the GNU General Public License.
  Notwithstanding any other provision of this License, if you modify the
 Program, your modified version must prominently offer all users
 interacting with it remotely through a computer network (if your version
 supports such interaction) an opportunity to receive the Corresponding
 Source of your version by providing access to the Corresponding Source
 from a network server at no charge, through some standard or customary
 means of facilitating copying of software.  This Corresponding Source
 shall include the Corresponding Source for any work covered by version 3
 of the GNU General Public License that is incorporated pursuant to the
 following paragraph.
  Notwithstanding any other provision of this License, you have
 permission to link or combine any covered work with a work licensed
 under version 3 of the GNU General Public License into a single
 combined work, and to convey the resulting work.  The terms of this
 License will continue to apply to the part which is the covered work,
 but the work with which it is combined will remain governed by version
 3 of the GNU General Public License.
  14. Revised Versions of this License.
  The Free Software Foundation may publish revised and/or new versions of
 the GNU Affero General Public License from time to time.  Such new versions
 will be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
  Each version is given a distinguishing version number.  If the
 Program specifies that a certain numbered version of the GNU Affero General
 Public License "or any later version" applies to it, you have the
 option of following the terms and conditions either of that numbered
 version or of any later version published by the Free Software
 Foundation.  If the Program does not specify a version number of the
 GNU Affero General Public License, you may choose any version ever published
 by the Free Software Foundation.
  If the Program specifies that a proxy can decide which future
 versions of the GNU Affero General Public License can be used, that proxy's
 public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.
  Later license versions may give you additional or different
 permissions.  However, no additional obligations are imposed on any
 author or copyright holder as a result of your choosing to follow a
 later version.
  15. Disclaimer of Warranty.
  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
 APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
 IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  16. Limitation of Liability.
  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGES.
  17. Interpretation of Sections 15 and 16.
  If the disclaimer of warranty and limitation of liability provided
 above cannot be given local legal effect according to their terms,
 reviewing courts shall apply local law that most closely approximates
 an absolute waiver of all civil liability in connection with the
 Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.
                     END OF TERMS AND CONDITIONS
            How to Apply These Terms to Your New Programs
  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
  To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
 state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.
    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If your software can interact with users remotely through a computer
 network, you should also make sure that it provides a way for users to
 get its source.  For example, if your program is a web application, its
 interface could display a "Source" link that leads users to an archive
 of the code.  There are many ways you could offer source, and different
 solutions will be better for different programs; see section 13 for the
 specific requirements.
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU AGPL, see
 <https://www.gnu.org/licenses/>.
--- a/python/MANIFEST.in
+++ b/python/MANIFEST.in
@ -1 +1 @@
-include erc20_demurrage_token/data/* erc20_demurrage_token/data/config/*.ini *requirements.txt man/build/*.1
+include erc20_demurrage_token/data/* erc20_demurrage_token/data/config/*.ini *requirements.txt
--- a/python/Makefile
+++ b/python/Makefile
@ -1,8 +0,0 @@
 all: pypi man
 pypi:
 	python setup.py sdist
 man:
 	mkdir -vp man/build
 	chainlib-man.py -b 0x3fafff -d man/build -n erc20-demurrage-token-publish -v man
--- a/python/erc20_demurrage_token/init.py
+++ b/python/erc20_demurrage_token/init.py
@ -3,6 +3,3 @@ from .token import (
        DemurrageTokenSettings,
        DemurrageRedistribution,
        )
 from .token import create
 from .token import bytecode
 from .token import args
--- a/python/erc20_demurrage_token/data/.chainlib
+++ b/python/erc20_demurrage_token/data/.chainlib
--- a/python/erc20_demurrage_token/data/DemurrageTokenMultiCap.bin
+++ b/python/erc20_demurrage_token/data/DemurrageTokenMultiCap.bin
--- a/python/erc20_demurrage_token/data/DemurrageTokenMultiCap.json
+++ b/python/erc20_demurrage_token/data/DemurrageTokenMultiCap.json
--- a/python/erc20_demurrage_token/data/DemurrageTokenMultiNocap.bin
+++ b/python/erc20_demurrage_token/data/DemurrageTokenMultiNocap.bin
--- a/python/erc20_demurrage_token/data/DemurrageTokenMultiNocap.json
+++ b/python/erc20_demurrage_token/data/DemurrageTokenMultiNocap.json
--- a/python/erc20_demurrage_token/data/DemurrageTokenSingleCap.bin
+++ b/python/erc20_demurrage_token/data/DemurrageTokenSingleCap.bin
--- a/python/erc20_demurrage_token/data/DemurrageTokenSingleCap.json
+++ b/python/erc20_demurrage_token/data/DemurrageTokenSingleCap.json
--- a/python/erc20_demurrage_token/data/DemurrageTokenSingleNocap.bin
+++ b/python/erc20_demurrage_token/data/DemurrageTokenSingleNocap.bin
--- a/python/erc20_demurrage_token/data/DemurrageTokenSingleNocap.json
+++ b/python/erc20_demurrage_token/data/DemurrageTokenSingleNocap.json
--- a/python/erc20_demurrage_token/data/DemurrageTokenSingleNocap.metadata.json
+++ b/python/erc20_demurrage_token/data/DemurrageTokenSingleNocap.metadata.json
--- a/python/erc20_demurrage_token/runnable/#publish.py#
+++ b/python/erc20_demurrage_token/runnable/#publish.py#
@ -1,176 +0,0 @@
 """Deploy sarafu token
 .. moduleauthor:: Louis Holbrook <dev@holbrook.no>
 .. pgp:: 0826EDA1702D1E87C6E2875121D2E7BB88C2A746 
 """
 # standard imports
 import sys
 import os
 import json
 import argparse
 import logging
 # external imports
 import confini
 from funga.eth.signer import EIP155Signer
 from funga.eth.keystore.dict import DictKeystore
 from chainlib.chain import ChainSpec
 from chainlib.eth.nonce import (
        RPCNonceOracle,
        OverrideNonceOracle,
        )
 from chainlib.eth.gas import (
        RPCGasOracle,
        OverrideGasOracle,
        )
 from chainlib.eth.connection import EthHTTPConnection
 from chainlib.eth.tx import receipt
 from chainlib.eth.constant import ZERO_ADDRESS
 import chainlib.eth.cli
 from chainlib.eth.cli.arg import (
        Arg,
        ArgFlag,
        process_args,
        )
 from chainlib.eth.cli.config import (
        Config,
        process_config,
        )
 from chainlib.eth.cli.log import process_log
 from chainlib.eth.settings import process_settings
 from chainlib.eth.address import to_checksum_address
 from chainlib.settings import ChainSettings
 from dexif import to_fixed
 # local imports
 import erc20_demurrage_token
 from erc20_demurrage_token import (
        DemurrageToken,
        DemurrageTokenSettings,
        )
 logg = logging.getLogger()
 script_dir = os.path.dirname(__file__)
 data_dir = os.path.join(script_dir, '..', 'data')
 config_dir = os.path.join(data_dir, 'config')
 def process_config_local(config, arg, args, flags):
    config.add(args.token_name, 'TOKEN_NAME')
    config.add(args.token_symbol, 'TOKEN_SYMBOL')
    config.add(args.token_decimals, 'TOKEN_DECIMALS')
    sink_address = to_checksum_address(args.sink_address)
    config.add(sink_address, 'TOKEN_SINK_ADDRESS')
    config.add(args.redistribution_period, 'TOKEN_REDISTRIBUTION_PERIOD')
    v = (1 - (args.demurrage_level / 1000000)) ** (1 / config.get('TOKEN_REDISTRIBUTION_PERIOD'))
    if v >= 1.0:
        raise ValueError('demurrage level must be less than 100%')
    demurrage_level = to_fixed(v)
    logg.info('v {} demurrage level {}'.format(v, demurrage_level))
    config.add(demurrage_level, 'TOKEN_DEMURRAGE_LEVEL')
    return config
 arg_flags = ArgFlag()
 arg = Arg(arg_flags)
 flags = arg_flags.STD_WRITE | arg_flags.WALLET
 argparser = chainlib.eth.cli.ArgumentParser(arg_flags)
 argparser = process_args(argparser, arg, flags)
 argparser.add_argument('--name', dest='token_name', type=str, help='Token name')
 argparser.add_argument('--symbol', dest='token_symbol', required=True, type=str, help='Token symbol')
 argparser.add_argument('--decimals', dest='token_decimals', type=int, help='Token decimals')
 argparser.add_argument('--sink-address', dest='sink_address', type=str, help='demurrage level,ppm per minute') 
 argparser.add_argument('--redistribution-period', type=int, help='redistribution period, minutes (0 = deactivate)') # default 10080 = week
 argparser.add_argument('--demurrage-level', dest='demurrage_level', type=int, help='demurrage level, ppm per period') 
 args = argparser.parse_args()
 logg = process_log(args, logg)
 config = Config()
 config = process_config(config, arg, args, flags)
 config = process_config_local(config, arg, args, flags)
 logg.debug('config loaded:\n{}'.format(config))
 settings = ChainSettings()
 settings = process_settings(settings, config)
 logg.debug('settings loaded:\n{}'.format(settings))
 #extra_args = {
 #        'redistribution_period': 'TOKEN_REDISTRIBUTION_PERIOD',
 #        'demurrage_level': 'TOKEN_DEMURRAGE_LEVEL',
 #        'supply_limit': 'TOKEN_SUPPLY_LIMIT',
 #        'token_name': 'TOKEN_NAME',
 #        'token_symbol': 'TOKEN_SYMBOL',
 #        'token_decimals': 'TOKEN_DECIMALS',
 #        'sink_address': 'TOKEN_SINK_ADDRESS',
 #        'multi': None,
 #        }
 #config = chainlib.eth.cli.Config.from_args(args, arg_flags, extra_args=extra_args, default_fee_limit=DemurrageToken.gas(), base_config_dir=config_dir)
 #
 #if not bool(config.get('TOKEN_NAME')):
 #    logg.info('token name not set, using symbol {} as name'.format(config.get('TOKEN_SYMBOL')))
 #    config.add(config.get('TOKEN_SYMBOL'), 'TOKEN_NAME', True)
 #
 #if config.get('TOKEN_SUPPLY_LIMIT') == None:
 #    config.add(0, 'TOKEN_SUPPLY_LIMIT', True)
 #
 #if config.get('TOKEN_REDISTRIBUTION_PERIOD') == None:
 #    config.add(10800, 'TOKEN_REDISTRIBUTION_PERIOD', True)
 #logg.debug('config loaded:\n{}'.format(config))
 #
 #wallet = chainlib.eth.cli.Wallet()
 #wallet.from_config(config)
 #
 #rpc = chainlib.eth.cli.Rpc(wallet=wallet)
 #conn = rpc.connect_by_config(config)
 #
 #chain_spec = ChainSpec.from_chain_str(config.get('CHAIN_SPEC'))
 def main():
    conn = settings.get('CONN')
    c = DemurrageToken(
            settings.get('CHAIN_SPEC'),
            signer=settings.get('SIGNER'),
            gas_oracle=settings.get('FEE_ORACLE'),
            nonce_oracle=settings.get('NONCE_ORACLE'),
            )
    token_settings = DemurrageTokenSettings()
    token_settings.name = config.get('TOKEN_NAME')
    token_settings.symbol = config.get('TOKEN_SYMBOL')
    token_settings.decimals = int(config.get('TOKEN_DECIMALS'))
    token_settings.demurrage_level = int(config.get('TOKEN_DEMURRAGE_LEVEL'))
    token_settings.period_minutes = int(config.get('TOKEN_REDISTRIBUTION_PERIOD'))
    token_settings.sink_address = config.get('TOKEN_SINK_ADDRESS')
    (tx_hash_hex, o) = c.constructor(
            settings.get('SENDER_ADDRESS'),
            token_settings,
            )
    if settings.get('RPC_SEND'):
        conn.do(o)
        if config.true('_WAIT'):
            r = conn.wait(tx_hash_hex)
            if r['status'] == 0:
                sys.stderr.write('EVM revert while deploying contract. Wish I had more to tell you')
                sys.exit(1)
            # TODO: pass through translator for keys (evm tester uses underscore instead of camelcase)
            address = r['contractAddress']
            print(address)
        else:
            print(tx_hash_hex)
    else:
        print(o)
 if __name__ == '__main__':
    main()
--- a/python/erc20_demurrage_token/runnable/.#publish.py
+++ b/python/erc20_demurrage_token/runnable/.#publish.py
@ -1 +0,0 @@
 wor@gecon.733148:1676287007
--- a/python/erc20_demurrage_token/runnable/publish.py
+++ b/python/erc20_demurrage_token/runnable/publish.py
@ -68,11 +68,10 @@ def process_config_local(config, arg, args, flags):
    config.add(sink_address, 'TOKEN_SINK_ADDRESS')
    config.add(args.redistribution_period, 'TOKEN_REDISTRIBUTION_PERIOD')
-    v = (1 - (args.demurrage_level / 1000000)) ** (1 / config.get('TOKEN_REDISTRIBUTION_PERIOD'))
+    v = args.demurrage_level / 1000000
    if v >= 1.0:
        raise ValueError('demurrage level must be less than 100%')
    demurrage_level = to_fixed(v)
    logg.info('v {} demurrage level {}'.format(v, demurrage_level))
    config.add(demurrage_level, 'TOKEN_DEMURRAGE_LEVEL')
    return config
--- a/python/erc20_demurrage_token/token.py
+++ b/python/erc20_demurrage_token/token.py
@ -78,34 +78,28 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
    __abi = {}
    __bytecode = {}
-    def constructor(self, sender_address, settings, tx_format=TxFormat.JSONRPC, version=None):
+    def constructor(self, sender_address, settings, tx_format=TxFormat.JSONRPC):
-        code = self.cargs(settings.name, settings.symbol, settings.decimals, settings.demurrage_level, settings.period_minutes, settings.sink_address, version=version)
+        code = DemurrageToken.bytecode()
        enc = ABIContractEncoder()
        enc.string(settings.name)
        enc.string(settings.symbol)
        enc.uint256(settings.decimals)
        enc.uint256(settings.demurrage_level)
        enc.uint256(settings.period_minutes)
        enc.address(settings.sink_address)
        code += enc.get()
        tx = self.template(sender_address, None, use_nonce=True)
        tx = self.set_code(tx, code)
        return self.finalize(tx, tx_format)
    @staticmethod
    def cargs(name, symbol, decimals, demurrage_level, period_minutes, sink_address, version=None):
        code = DemurrageToken.bytecode()
        enc = ABIContractEncoder()
        enc.string(name)
        enc.string(symbol)
        enc.uint256(decimals)
        enc.uint256(demurrage_level)
        enc.uint256(period_minutes)
        enc.address(sink_address)
        code += enc.get()
        return code
    @staticmethod
    def gas(code=None):
-        return 7000000
+        return 4000000
    @staticmethod
-    def abi():
+    def abi(multi=True):
        name = 'DemurrageTokenSingleNocap'
        if DemurrageToken.__abi.get(name) == None:
            f = open(os.path.join(data_dir, name + '.json'), 'r')
@ -115,7 +109,7 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
    @staticmethod
-    def bytecode(version=None):
+    def bytecode(multi=True):
        name = 'DemurrageTokenSingleNocap'
        if DemurrageToken.__bytecode.get(name) == None:
            f = open(os.path.join(data_dir, name + '.bin'), 'r')
@ -443,19 +437,6 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
        return tx
    def sweep(self, contract_address, sender_address, recipient_address, tx_format=TxFormat.JSONRPC):
        enc = ABIContractEncoder()
        enc.method('sweep')
        enc.typ(ABIContractType.ADDRESS)
        enc.address(recipient_address)
        data = enc.get()
        tx = self.template(sender_address, contract_address, use_nonce=True)
        tx = self.set_code(tx, data)
        tx = self.finalize(tx, tx_format)
        return tx
    def apply_demurrage(self, contract_address, sender_address, limit=0, tx_format=TxFormat.JSONRPC):
        if limit == 0:
            return self.transact_noarg('applyDemurrage', contract_address, sender_address)
@ -487,8 +468,10 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
        return tx
-    def decay_level(self, contract_address, sender_address=ZERO_ADDRESS):
+
-        return self.call_noarg('decayLevel', contract_address, sender_address=sender_address)
+
    def tax_level(self, contract_address, sender_address=ZERO_ADDRESS):
        return self.call_noarg('taxLevel', contract_address, sender_address=sender_address)
    def resolution_factor(self, contract_address, sender_address=ZERO_ADDRESS):
@ -669,7 +652,7 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
    @classmethod
-    def parse_decay_level(self, v):
+    def parse_tax_level(self, v):
        return abi_decode_single(ABIContractType.UINT256, v)
@ -682,25 +665,3 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
    def parse_total_burned(self, v):
        return abi_decode_single(ABIContractType.UINT256, v)
 def bytecode(**kwargs):
    return DemurrageToken.bytecode(version=kwargs.get('version'))
 def create(**kwargs):
    return DemurrageToken.cargs(
            kwargs['name'],
            kwargs['symbol'],
            kwargs['decimals'],
            kwargs['demurragelevel'],
            kwargs['redistributionperiod'],
            kwargs['sinkaddress'],
            version=kwargs.get('version'))
 def args(v):
    if v == 'create':
        return (['name', 'symbol', 'decimals', 'demurragelevel', 'redistributionperiod', 'sinkaddress'], ['version'],)
    elif v == 'default' or v == 'bytecode':
        return ([], ['version'],)
    raise ValueError('unknown command: ' + v)
--- a/python/erc20_demurrage_token/unittest/base.py
+++ b/python/erc20_demurrage_token/unittest/base.py
@ -61,10 +61,10 @@ class TestTokenDeploy:
            self.start_time = int(r['timestamp'])
-    def publish(self, rpc, publisher_address, interface, supply_cap=0):
+    def deploy(self, rpc, deployer_address, interface, supply_cap=0):
        tx_hash = None
        o = None
-        (tx_hash, o) = interface.constructor(publisher_address, self.settings)
+        (tx_hash, o) = interface.constructor(deployer_address, self.settings)
        r = rpc.do(o)
        o = receipt(tx_hash)
@ -77,6 +77,12 @@ class TestTokenDeploy:
        r = rpc.do(o)
        self.start_time = r['timestamp']
        (tx_hash, o) = interface.add_writer(self.address, deployer_address, deployer_address)
        r = rpc.do(o)
        o = receipt(tx_hash)
        r = rpc.do(o)
        assert r['status'] == 1
        return self.address
@ -89,7 +95,7 @@ class TestDemurrage(EthTesterCase):
            period = getattr(self, 'period')
        except AttributeError as e:
            pass
-        self.publisher = TestTokenDeploy(self.rpc, period=period, sink_address=self.accounts[9])
+        self.deployer = TestTokenDeploy(self.rpc, period=period, sink_address=self.accounts[9])
        self.default_supply = 0
        self.default_supply_cap = 0
        self.start_block = None
@ -97,13 +103,13 @@ class TestDemurrage(EthTesterCase):
        self.start_time = None
-    def publish(self, interface):
+    def deploy(self, interface):
-        self.address = self.publisher.publish(self.rpc, self.accounts[0], interface, supply_cap=self.default_supply_cap)
+        self.address = self.deployer.deploy(self.rpc, self.accounts[0], interface, supply_cap=self.default_supply_cap)
-        self.start_block = self.publisher.start_block
+        self.start_block = self.deployer.start_block
-        self.start_time = self.publisher.start_time
+        self.start_time = self.deployer.start_time
-        self.tax_level = self.publisher.tax_level
+        self.tax_level = self.deployer.tax_level
-        self.period_seconds = self.publisher.period_seconds
+        self.period_seconds = self.deployer.period_seconds
-        self.sink_address = self.publisher.sink_address
+        self.sink_address = self.deployer.sink_address
        logg.debug('contract address {} start block {} start time {}'.format(self.address, self.start_block, self.start_time))
@ -119,13 +125,6 @@ class TestDemurrage(EthTesterCase):
        raise AssertionError('{} not within lower {} and higher {}'.format(v, lower_target, higher_target))
    def assert_within_greater(self, v, target, tolerance_ppm):
        greater_target = target + (target * (tolerance_ppm / 1000000))
        self.assertLessEqual(v, greater_target)
        self.assertGreaterEqual(v, target)
        logg.debug('asserted within greater {} >= {} >= {}'.format(greater_target, v, target))
    def assert_within_lower(self, v, target, tolerance_ppm):
        lower_target = target - (target * (tolerance_ppm / 1000000))
        self.assertGreaterEqual(v, lower_target)
@ -151,7 +150,7 @@ class TestDemurrageDefault(TestDemurrage):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
-        self.publish(c)
+        self.deploy(c)
        self.default_supply = 10**12
        self.default_supply_cap = self.default_supply
--- a/python/man/build/erc20-demurrage-token-publish.1
+++ b/python/man/build/erc20-demurrage-token-publish.1
@ -1,218 +0,0 @@
 .TH erc20-demurrage-token-publish 1
 .SH NAME
 erc20-demurrage-token-publish \- Publishing tool for the ERC20 Demurrage Token smart contract.
 .SH SYNOPSIS
 .SY erc20-demurrage-token-publish
 .RI --name NAME --symbol SYMBOL --decimals DECIMALS --demurrage-level PPM --redistribution-period MINUTES --sink-address ADDRESS
 .YS
 .SH DESCRIPTION
 .P
 This tool generates the appropriate bytecode to store the ERC20 Demurrage Token smartcontract code on an EVM chain, along with the required construction parameters.
 Arguments for EVM encoding and interaction with EVM RPC node is handled by the \fBchainlib-eth\fP python package.
 Specific arguments for this tool are the \fB--demurrage-level\fP, \fB--redistribution-period\fP and \fB--sink-address\fP arguments.
 .SS OPTIONS
 .TP
 \fB-0\fP
 Omit newline to output
 .TP
 \fB-c \fI\fIconfig_dir\fP\fP, \fB--config \fI\fIconfig_dir\fP\fP
 Load configuration files from given directory. All files with an .ini extension will be loaded, of which all must contain valid ini file data.
 .TP
 \fB--demurrage-level \fI\fIlevel
 \fP\fP
 Level of decay per minute. See SPECIFYING DEMURRAGE below.
 .TP
 \fB--dumpconfig \fI\fIformat\fP\fP
 Output configuration settings rendered from environment and inputs. Valid arguments are \fIini\fP for ini file output, and \fIenv\fP for environment variable output. See \fBCONFIGURATION\fP.
 .TP
 \fB-e\fP, \fB--executable-address\fP
 Address of an executable code point on the network.
 .TP
 \fB--env-prefix\fP
 Environment prefix for variables to overwrite configuration. Example: If \fB--env-prefix\fP is set to \fBFOO\fP then configuration variable \fBBAR_BAZ\fP would be set by environment variable \fBFOO_BAZ_BAR\fP. Also see \fBENVIRONMENT\fP.
 .TP
 \fB--fee-limit\fP
 Set the limit of execution units for the transaction. If used with \fB-s\fP this may incur actual network token cost. If \fB--fee-price\fP is not explicitly set, the price \fImay\fP be retrieved from the network, and multiplied with this value to define the cost.
 .TP
 \fB--fee-price\fP
 Set fee unit price to offer for the transaction. If used with \fB-s\fP this may incur actual network token cost.
 .TP
 \fB--height\fP
 Block height at which to query state for. Does not apply to transactions.
 .TP
 \fB-i \fI\fIchain_spec\fP\fP, \fB--chain-spec \fI\fIchain_spec\fP\fP
 Chain specification string, in the format <engine>:<fork>:<chain_id>:<common_name>. Example: "evm:london:1:ethereum". Overrides the \fIRPC_CREDENTIALS\fP configuration setting.
 .TP
 \fB-n \fI\fInamespace\fP\fP, \fB--namespace \fI\fInamespace\fP\fP
 Load given configuration namespace. Configuration will be loaded from the immediate configuration subdirectory with the same name.
 .TP
 \fB--no-logs\fP
 Turn of logging completely. Negates \fB-v\fP and \fB-vv\fP
 .TP
 \fB--nonce\fP
 Explicitly set nonce to use for transaction.
 .TP
 \fB-p\fP, \fB--rpc-provider\fP
 Fully-qualified URL of RPC provider. Overrides the \fIRPC_PROVIDER\fP configuration setting.
 .TP
 \fB--passphrase-file \fI\fIpath\fP\fP
 Path to file containing password to unlock key file
 .TP
 \fB--raw\fP
 Produce output most optimized for machines.
 .TP
 \fB--redistribution-period \fI\fIminutes
 \fP\fP
 Number of minuntes between each withdrawal of demurraged value is possible.
 .TP
 \fB--rpc-auth\fP
 RPC endpoint authentication method, e.g. how to handle a HTTP WWW-Authenticate header. Overrides the \fIRPC_AUTH\fP configuration setting.
 .TP
 \fB--rpc-credentials\fP
 RPC endpoint authentication data. Format depends on the authentication method defined in \fB--rpc-auth\fP. Overrides the \fIRPC_CREDENTIALS\fP configuration setting.
 .TP
 \fB--rpc-dialect\fP
 RPC backend dialect. If specified it \fImay\fP help with encoding and decoding issues. Overrides the \fIRPC_DIALECT\fP configuration setting.
 .TP
 \fB-s\fP
 Send to network. If set, network state may change. This means tokens may be spent and so on. Use with care. Only applies to transactions.
 .TP
 \fB--seq\fP
 Use numeric sequencial jsonrpc query ids. Useful for buggy server implementations who expects such.
 .TP
 \fB--sink-address \fI\fIaddress
 \fP\fP
 Initial address receiving the demurrage value withdrawal.
 .TP
 \fB-u\fP, \fB--unsafe\fP
 Allow addresses that do not pass checksum.
 .TP
 \fB-v\fP
 Verbose. Show logs for important state changes.
 .TP
 \fB-vv\fP
 Very verbose. Show logs with debugging information.
 .TP
 \fB-w\fP
 Wait for the last transaction to be confirmed on the network. Will generate an error if the EVM execution fails.
 .TP
 \fB-ww\fP
 Wait for \fIall\fP transactions sequentially to be confirmed on the network. Will generate an error if EVM execution fails for any of the transactions.
 .TP
 \fB-y \fI\fIpath\fP\fP, \fB--key-path \fI\fIpath\fP\fP
 Path to signing key. Overrides the \fIWALLET_KEY_FILE\fP configuration setting.
 .SH CONFIGURATION
 All configuration settings may be overriden both by environment variables, or by overriding settings with the contents of ini-files in the directory defined by the \fB-c\fP option.
 The active configuration, with values assigned from environment and arguments, can be output using the \fB--dumpconfig\fP \fIformat\fP option. Note that entries having keys prefixed with underscore (e.g. _SEQ) are not actual configuration settings, and thus cannot be overridden with environment variables.
 To refer to a configuration setting by environment variables, the \fIsection\fP and \fIkey\fP are concatenated together with an underscore, and transformed to upper-case. For example, the configuration variable \fIFOO_BAZ_BAR\fP refers to an ini-file entry as follows:
 .EX
 [foo]
 bar_baz = xyzzy
 .EE
 In the \fBENVIRONMENT\fP section below, the relevant configuration settings for this tool is listed along with a short description of its meaning.
 Some configuration settings may also be overriden by command line options. Also note that the use of the \fB-n\fP and \fB--env-prefix\fP options affect how environment and configuration is read. The effects of options on how configuration settings are affective is described in the respective \fBOPTIONS\fP section.
 .SH SPECIFYING DEMURRAGE
 Demurrage is specified as a parts-per-million value in terms of the chosen \fI--redistribution-period\fP.
 For example, a value of \fB20000\fP with a \fI--redistribution-period\fP of \fB43200\fP corresponds to a \fB2%\fP demurrage per \fB30\fP days.
 .SH ENVIRONMENT
 .TP
 \fICHAIN_SPEC\fP
 String specifying the type of chain connected to, in the format \fI<engine>:<fork>:<network_id>:<common_name>\fP. For EVM nodes the \fIengine\fP value will always be \fIevm\fP.
 .TP
 \fIRPC_AUTH\fP
 Authentication method to use for the \fIRPC_PROVIDER\fP. Currently only \fIbasic\fP is supported.
 .TP
 \fIRPC_CREDENTIALS\fP
 Authentication credentials to use for \fIRPC_AUTH\fP. For \fIbasic\fP authentication the value must be given as \fI<user>:<pass>\fP.
 .TP
 \fIRPC_DIALECT\fP
 Enables translations of EVM node specific formatting and response codes.
 .TP
 \fIRPC_PROVIDER\fP
 Fully-qualified URL to the RPC endpoint of the blockchain node.
 .TP
 \fIWALLET_KEY_FILE\fP
 The wallet key file containing private key to use for transaction signing. Overridden by \fB-y\fP.
 .TP
 \fIWALLET_PASSPHRASE\fP
 Passphrase to unlock wallet. \fBWARNING:\fP it is \fBunsafe\fP to pass the passphrase as an environment variable. If the key unlocks something of value, the passphrase should rather be in a configuration file, preferably as an encrypted entry. Alternatively, a passphrase can be read from file using the \fB--passphrase-file\fP option. Files containing passphrases should only be accessible by the owner.
 .SH LICENSE
 This documentation and its source is licensed under the Creative Commons Attribution-Sharealike 4.0 International license.
 The source code of the tool this documentation describes is licensed under the GNU General Public License 3.0.
 .SH COPYRIGHT
 Louis Holbrook <dev@holbrook.no> (https://holbrook.no)
 PGP: 59A844A484AC11253D3A3E9DCDCBD24DD1D0E001
 .SH SOURCE CODE
 https://git.defalsify.org
 .SH SEE ALSO
 .BP
 confini-dump(1), eth-keyfile(1)
--- a/python/man/erc20-demurrage-token-publish.custom.groff
+++ b/python/man/erc20-demurrage-token-publish.custom.groff
@ -1,5 +0,0 @@
 .SH SPECIFYING DEMURRAGE
 Demurrage is specified as a parts-per-million value in terms of the chosen \fI--redistribution-period\fP.
 For example, a value of \fB20000\fP with a \fI--redistribution-period\fP of \fB43200\fP corresponds to a \fB2%\fP demurrage per \fB30\fP days.
--- a/python/man/erc20-demurrage-token-publish.head.groff
+++ b/python/man/erc20-demurrage-token-publish.head.groff
@ -1,22 +0,0 @@
 .TH erc20-demurrage-token-publish 1
 .SH NAME
 erc20-demurrage-token-publish \- Publishing tool for the ERC20 Demurrage Token smart contract.
 .SH SYNOPSIS
 .SY erc20-demurrage-token-publish
 .RI --name NAME --symbol SYMBOL --decimals DECIMALS --demurrage-level PPM --redistribution-period MINUTES --sink-address ADDRESS
 .YS
 .SH DESCRIPTION
 .P
 This tool generates the appropriate bytecode to store the ERC20 Demurrage Token smartcontract code on an EVM chain, along with the required construction parameters.
 Arguments for EVM encoding and interaction with EVM RPC node is handled by the \fBchainlib-eth\fP python package.
 Specific arguments for this tool are the \fB--demurrage-level\fP, \fB--redistribution-period\fP and \fB--sink-address\fP arguments.
 .SS OPTIONS
--- a/python/man/erc20-demurrage-token-publish.overrides
+++ b/python/man/erc20-demurrage-token-publish.overrides
@ -1,3 +0,0 @@
 demurragelevel	Level of decay per minute. See SPECIFYING DEMURRAGE below.	--demurrage-level	level
 redistributionperiod	Number of minuntes between each withdrawal of demurraged value is possible.	--redistribution-period	minutes
 sinkaddress	Initial address receiving the demurrage value withdrawal.	--sink-address	address
--- a/python/requirements.txt
+++ b/python/requirements.txt
@ -1,5 +1,4 @@
 chainlib-eth~=0.4.11
-chainlib~=0.4.12
+eth-erc20~=0.5.0
 eth-erc20~=0.7.0
 funga-eth~=0.6.0
-dexif~=0.0.2
+dexif~=0.0.1
--- a/python/setup.cfg
+++ b/python/setup.cfg
@ -1,10 +1,10 @@
 [metadata]
 name = erc20-demurrage-token
-version = 0.5.6
+version = 0.3.3
 description = ERC20 token with redistributed continual demurrage
 author = Louis Holbrook
 author_email = dev@holbrook.no
-url = https://holbrook.no/src/erc20-demurrage-token/log.html
+url = https://gitlab.com/ccicnet/erc20-demurrage-token
 keywords =
 	ethereum
 	blockchain
@ -13,20 +13,19 @@ keywords =
 classifiers =
 	Programming Language :: Python :: 3
 	Operating System :: OS Independent
-	Development Status :: 4 - Beta
+	Development Status :: 3 - Alpha
-	Environment :: Console
+	Environment :: No Input/Output (Daemon)
 	Intended Audience :: Developers
-	License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
+	License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
 	Topic :: Internet
 	Topic :: Software Development :: Libraries
 	#Topic :: Blockchain :: EVM
-license = AGPLv3+
+license = GPL3
 licence_files =
 	LICENSE
 [options]
 include_package_data = True
-python_requires = >= 3.8
+python_requires = >= 3.7
 packages =
 	erc20_demurrage_token
 	erc20_demurrage_token.runnable
--- a/python/setup.py
+++ b/python/setup.py
@ -1,5 +1,4 @@
 from setuptools import setup
 import os
 requirements = []
 f = open('requirements.txt', 'r')
@ -20,7 +19,6 @@ while True:
 f.close()
 man_dir = 'man/build'
 setup(
        package_data={
            '': [
@ -30,8 +28,4 @@ setup(
        include_package_data=True,
        install_requires=requirements,
        tests_require=test_requirements,
        data_files=[("man/man1", [
                os.path.join(man_dir, 'erc20-demurrage-token-publish.1'),
            ]
             )],
        )
--- a/python/tests/test_amounts.py
+++ b/python/tests/test_amounts.py
@ -122,26 +122,5 @@ class TestAmounts(TestDemurrageDefault):
            self.assert_within_lower(balance, case[1], 10000)
    def test_sweep(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], 2000)
        r = self.rpc.do(o)
        (tx_hash, o) = c.sweep(self.address, self.accounts[0], self.accounts[1])
        self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        self.assertEqual(c.parse_balance(r), 0)
        o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        self.assert_within(c.parse_balance(r), 2000, 1)
 if __name__ == '__main__':
    unittest.main()
--- a/python/tests/test_basic.py
+++ b/python/tests/test_basic.py
@ -308,30 +308,6 @@ class TestBasic(TestDemurrageDefault):
        self.assertEqual(r['status'], 1)
    def test_approve_max(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], int.from_bytes(b'\xff' * 32, byteorder='big'))
        self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 0)
        self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        self.backend.time_travel(self.start_time + (60 * 60 * 24 * 365 * 10))
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], int.from_bytes(b'\xff' * 32, byteorder='big'))
        self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
    def test_transfer_from(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
--- a/python/tests/test_burn.py
+++ b/python/tests/test_burn.py
@ -1,314 +0,0 @@
 # standard imports
 import os
 import unittest
 import json
 import logging
 import datetime
 # external imports
 from chainlib.eth.constant import ZERO_ADDRESS
 from chainlib.eth.nonce import RPCNonceOracle
 from chainlib.eth.tx import receipt
 from chainlib.eth.block import (
        block_latest,
        block_by_number,
    )
 # local imports
 from erc20_demurrage_token import DemurrageToken
 # test imports
 from erc20_demurrage_token.unittest.base import TestDemurrageDefault
 logging.basicConfig(level=logging.INFO)
 logg = logging.getLogger()
 testdir = os.path.dirname(__file__)
 #TAX_LEVEL = 2
 class TestBurn(TestDemurrageDefault):
    def setUp(self):
        super(TestBurn, self).setUp()
 #
 #    def publish(self, tax_level=None):
 #        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
 #        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
 #
 #        if tax_level != None:
 #            self.publisher.settings.demurrage_level = tax_level * (10 ** 32)
 #        self.publisher.settings.sink_address = self.accounts[9]
 #        self.publisher.sink_address = self.accounts[9]
 #        super(TestBurn, self).publish(c)
    # Burn tokens and immediately check balances and supply
    def test_burn_basic(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], 1000000)
        r = self.rpc.do(o)
        nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.burn(self.address, self.accounts[1], 600000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 0)
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.add_minter(self.address, self.accounts[0], self.accounts[1])
        r = self.rpc.do(o)
        nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.burn(self.address, self.accounts[1], 600000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        o = c.total_supply(self.address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        new_supply = c.parse_total_supply(r)
        self.assertEqual(new_supply, 400000)
        o = c.total_burned(self.address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        burned = c.parse_total_burned(r)
        self.assertEqual(burned, 600000)
    # burn tokens and check sink balance and supply after first redistribution period
    def test_burned_redistribution(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], 1000000000)
        r = self.rpc.do(o)
        (tx_hash, o) = c.burn(self.address, self.accounts[0], 500000000)
        self.rpc.do(o)
        (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.sink_address, 500000000)
        r = self.rpc.do(o)
        self.backend.time_travel(self.start_time + self.period_seconds)
        o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        bal = c.parse_balance(r)
        self.assert_within(bal, 490000000, 1) # 2% == 10000000
        (tx_hash, o) = c.change_period(self.address, self.accounts[0])
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        o = c.total_supply(self.address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        new_supply = c.parse_total_supply(r)
        self.assertEqual(new_supply, 500000000)
        o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        bal = c.parse_balance(r)
        self.assert_within(bal, 500000000, 1)
        self.backend.time_travel(self.start_time + (self.period_seconds * 2))
        (tx_hash, o) = c.change_period(self.address, self.accounts[0])
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        o = c.total_supply(self.address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        new_supply = c.parse_total_supply(r)
        self.assertEqual(new_supply, 500000000)
        # if we don't burn anything more it should be the same 
        o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        bal = c.parse_balance(r)
        self.assert_within_lower(bal, 500000000, 1)
    # burn tokens and check sink and taxed balance and supply after first redistribution period
    def test_burned_other_redistribution(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], 1000000000)
        r = self.rpc.do(o)
        (tx_hash, o) = c.burn(self.address, self.accounts[0], 500000000)
        r = self.rpc.do(o)
        (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.accounts[1], 500000000)
        r = self.rpc.do(o)
        self.backend.time_travel(self.start_time + self.period_seconds)
        o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        bal = c.parse_balance(r)
        #self.assertEqual(bal, 416873881) # 9 periods demurrage
        self.assert_within(bal, 490000000, 1)
        (tx_hash, o) = c.change_period(self.address, self.accounts[0])
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        o = c.total_supply(self.address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        new_supply = c.parse_total_supply(r)
        self.assertEqual(new_supply, 500000000)
        o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        bal = c.parse_balance(r)
        self.assert_within(bal, 490000000, 1)
        o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        sink_bal = c.parse_balance(r)
        self.assert_within_lower(sink_bal, 10000000, 1) # TODO is this ok variance, 1.0 is ppm?
        self.backend.time_travel(self.start_time + (self.period_seconds * 2))
        (tx_hash, o) = c.change_period(self.address, self.accounts[0])
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        o = c.total_supply(self.address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        new_supply = c.parse_total_supply(r)
        self.assertEqual(new_supply, 500000000)
        o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        next_bal = c.parse_balance(r)
        self.assert_within(next_bal, 480200000, 0.01)
        o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        prev_sink_bal = sink_bal
        bal = prev_sink_bal + (bal - next_bal)
        sink_bal = c.parse_balance(r)
        self.assert_within_lower(sink_bal, bal, 0.09) # TODO is this ok variance, 1.0 is ppm?
    # verify expected results of balance and supply after multiple redistribution periods
    def test_burn_accumulate(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.add_minter(self.address, self.accounts[0], self.sink_address)
        self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.sink_address, self.default_supply)
        r = self.rpc.do(o)
        balance_share = int(self.default_supply / 2)
        nonce_oracle = RPCNonceOracle(self.sink_address, self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[1], balance_share)
        r = self.rpc.do(o)
        new_supply = None
        burn_rate = 1000
        sink_bal = None
        bob_bal = None
        bob_refund = None
        o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        bob_bal = c.parse_balance(r)
        prev_bob_bal = bob_bal
        o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        logg.info('sink has balance {}'.format(c.parse_balance(r)))
        iterations = 100
        for i in range(1, iterations + 1):
            nonce_oracle = RPCNonceOracle(self.sink_address, self.rpc)
            c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
            if bob_refund != None:
                (tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[1], bob_refund)
                r = self.rpc.do(o)
                o = receipt(tx_hash)
                r = self.rpc.do(o)
                self.assertEqual(r['status'], 1)
            (tx_hash, o) = c.burn(self.address, self.sink_address, burn_rate)
            r = self.rpc.do(o)
            o = receipt(tx_hash)
            r = self.rpc.do(o)
            self.assertEqual(r['status'], 1)
            nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
            c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
            o = c.total_supply(self.address, sender_address=self.accounts[0])
            r = self.rpc.do(o)
            new_supply = c.parse_total_supply(r)
            self.backend.time_travel(self.start_time + (self.period_seconds * i))
            (tx_hash, o) = c.change_period(self.address, self.accounts[0])
            self.rpc.do(o)
            o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
            r = self.rpc.do(o)
            bob_bal = c.parse_balance(r)
            bob_refund = prev_bob_bal - bob_bal
            o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
            r = self.rpc.do(o)
            burner_bal = c.parse_balance(r)
            sum_supply = bob_bal + burner_bal
            o = c.total_burned(self.address, sender_address=self.accounts[0])
            r = self.rpc.do(o)
            total_burned = c.parse_balance(r)
            o = c.to_base_amount(self.address, total_burned, sender_address=self.accounts[0])
            r = self.rpc.do(o)
            total_burned_base = c.parse_balance(r)
            expected_supply = self.default_supply - (burn_rate * i)
            logg.info('checking burn round {} balance burner {} bob {} supply {} expected {} summed {} burned {} base {}'.format(i, burner_bal, bob_bal, new_supply, expected_supply, sum_supply, total_burned, total_burned_base))
            self.assertEqual(new_supply, expected_supply)
        sum_supply = burner_bal + bob_bal
        logg.debug('balances sink {} bob {} total {} supply real {} original {}'.format(sink_bal, bob_bal, sum_supply, new_supply, self.default_supply))
        self.assert_within_lower(sum_supply, new_supply, 1)
        self.assert_within_lower(burner_bal, balance_share - total_burned + bob_refund, 1)
        bob_delta = self.default_supply * ((2 / 1000000) / 1000)
        self.assert_within_greater(bob_bal, balance_share - bob_delta - bob_refund, 1)
        self.assertEqual(total_burned, iterations * burn_rate)
 if __name__ == '__main__':
    unittest.main()
--- a/python/tests/test_demurrage.py.old
+++ b/python/tests/test_demurrage.py.old
@ -1,114 +0,0 @@
 # standard imports
 import datetime
 import unittest
 import logging
 import os
 # external imports
 from chainlib.eth.nonce import RPCNonceOracle
 from chainlib.eth.tx import receipt
 # local imports
 from erc20_demurrage_token import DemurrageToken
 from erc20_demurrage_token.demurrage import DemurrageCalculator
 # test imports
 from erc20_demurrage_token.unittest import TestDemurrageDefault
 logging.basicConfig(level=logging.INFO)
 logg = logging.getLogger()
 class TestDemurragePeriods(TestDemurrageDefault):
    # verify that tax level calculation is in ppm as expected
    def test_ppm(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], self.default_supply)
        r = self.rpc.do(o)
        self.backend.time_travel(self.start_time + 60)
        (tx_hash, o) = c.apply_demurrage(self.address, self.accounts[0])
        self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        bob_bal = c.parse_balance(r)
        o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        sink_bal = c.parse_balance(r)
        o = c.total_supply(self.address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        new_supply = c.parse_total_supply(r)
        balance_delta = self.default_supply * ((2 / 1000000) / 1000) 
        self.assertEqual(bob_bal, self.default_supply - balance_delta)
    # verify balances and supply after multiple demurrage periods
    def test_over_time(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], self.default_supply)
        r = self.rpc.do(o)
        o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
        r = self.rpc.do(o)
        bob_bal = c.parse_balance(r)
        prev_bob_bal = bob_bal
        nonce_oracle = RPCNonceOracle(self.sink_address, self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        iterations = 100
        for i in range(1, iterations + 1):
            self.backend.time_travel(self.start_time + (self.period_seconds * i))
            (tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[1], prev_bob_bal - bob_bal)
            r = self.rpc.do(o)
            o = receipt(tx_hash)
            r = self.rpc.do(o)
            self.assertEqual(r['status'], 1)
            (tx_hash, o) = c.apply_demurrage(self.address, self.sink_address)
            self.rpc.do(o)
            o = receipt(tx_hash)
            r = self.rpc.do(o)
            self.assertEqual(r['status'], 1)
            o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
            r = self.rpc.do(o)
            bob_bal = c.parse_balance(r)
            o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
            r = self.rpc.do(o)
            sink_bal = c.parse_balance(r)
            o = c.total_supply(self.address, sender_address=self.accounts[0])
            r = self.rpc.do(o)
            new_supply = c.parse_total_supply(r)
            logg.info('round {} supply {} balance sink {} bob {}'.format(i, new_supply, sink_bal, bob_bal))
        sum_supply = sink_bal + bob_bal
        bob_delta = self.default_supply * ((2 / 1000000) / 100)
        self.assert_within_lower(sum_supply, new_supply, 0.00001)
        self.assert_within_greater(bob_bal, self.default_supply - bob_delta, 0.001)
        self.assert_within_lower(sink_bal, bob_delta, 1000)
 if __name__ == '__main__':
    unittest.main()
--- a/python/tests/test_mint.py
+++ b/python/tests/test_mint.py
@ -1,77 +0,0 @@
 # standard imports
 import os
 import unittest
 import json
 import logging
 # external imports
 from chainlib.eth.constant import ZERO_ADDRESS
 from chainlib.eth.nonce import RPCNonceOracle
 from chainlib.eth.tx import receipt
 from chainlib.eth.block import block_latest
 from chainlib.eth.block import block_by_number
 # local imports
 from erc20_demurrage_token import DemurrageToken
 # test imports
 from erc20_demurrage_token.unittest import TestDemurrageDefault
 logging.basicConfig(level=logging.DEBUG)
 logg = logging.getLogger()
 testdir = os.path.dirname(__file__)
 class TestAmounts(TestDemurrageDefault):
    def test_mint(self):
        o = block_latest()
        r = self.rpc.do(o)
        o = block_by_number(r)
        r = self.rpc.do(o)
        tb = r['timestamp']
        self.backend.time_travel(self.start_time + 800)
        o = block_latest()
        r = self.rpc.do(o)
        o = block_by_number(r)
        r = self.rpc.do(o)
        ta = r['timestamp']
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], 1000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
    def test_writer(self):
        nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[1], self.accounts[1], 1000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 0)
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.add_writer(self.address, self.accounts[0], self.accounts[1])
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
        nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[1], self.accounts[1], 1000)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)
 if __name__ == '__main__':
    unittest.main()
--- a/python/tests/test_redistribution_unit.py
+++ b/python/tests/test_redistribution_unit.py
@ -34,7 +34,6 @@ testdir = os.path.dirname(__file__)
 class TestRedistribution(TestDemurrageDefault):
    # TODO: move to "pure" test file when getdistribution is implemented in all contracts
    def test_distribution_direct(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
--- a/solidity/DemurrageTokenSingleNocap.sol
+++ b/solidity/DemurrageTokenSingleNocap.sol
@ -1,19 +1,17 @@
 pragma solidity >= 0.8.0;
 import "aux/ABDKMath64x64.sol";
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: GPL-3.0-or-later
 contract DemurrageTokenSingleNocap {
 	uint256 constant VALUE_LIMIT = 1 << 63;
 	struct redistributionItem {
 		uint32 period;
 		uint72 value;
 		uint64 demurrage;
 	}
-	redistributionItem[] public redistributions;
+	redistributionItem[] public redistributions; // uint51(unused) | uint64(demurrageModifier) | uint36(participants) | uint72(value) | uint32(period)
 	// Account balances
 	mapping (address => uint256) account;
@ -25,7 +23,7 @@ contract DemurrageTokenSingleNocap {
 	// Cached demurrage timestamp; the timestamp for which demurrageAmount was last calculated
 	uint256 public demurrageTimestamp;
-	// Implements EIP173
+	// Implements EIP172
 	address public owner;
 	address newOwner;
@ -39,6 +37,8 @@ contract DemurrageTokenSingleNocap {
 	// Implements ERC20
 	uint256 public immutable decimals;
 	// Implements ERC20
 	//uint256 public totalSupply;
 	uint256 supply;
 	// Last executed period
@ -48,7 +48,7 @@ contract DemurrageTokenSingleNocap {
 	uint256 public totalSink;
 	// Value of burnt tokens (burnt tokens do not decay)
-	uint256 burned;
+	uint256 public burned;
 	// 128 bit resolution of the demurrage divisor
 	// (this constant x 1000000 is contained within 128 bits)
@ -67,15 +67,15 @@ contract DemurrageTokenSingleNocap {
 	uint256 public immutable periodDuration;
 	// Demurrage in ppm per minute
-	//uint256 public immutable decayLevel;
+	//uint256 public immutable taxLevel;
 	// 64x64
-	int128 public immutable decayLevel;
+	int128 public immutable taxLevel;
 	// Addresses allowed to mint new tokens
 	mapping (address => bool) minter;
 	// Storage for ERC20 approve/transferFrom methods
-	mapping (address => mapping (address => uint256 ) ) public allowance; // holder -> spender -> amount (amount is subject to demurrage)
+	mapping (address => mapping (address => uint256 ) ) allowance; // holder -> spender -> amount (amount is subject to demurrage)
 	// Address to send unallocated redistribution tokens
 	address public sinkAddress; 
@ -93,7 +93,7 @@ contract DemurrageTokenSingleNocap {
 	// Implements ERC20
 	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
-	// Implements Minter
+	// New tokens minted
 	event Mint(address indexed _minter, address indexed _beneficiary, uint256 _value);
 	// New demurrage cache milestone calculated
@ -109,38 +109,32 @@ contract DemurrageTokenSingleNocap {
 	//event Debug(bytes32 _foo);
 	event Debug(int128 indexed _foo, uint256 indexed _bar);
-	// Implements Burn
+	// Emitted when tokens are burned
 	event Burn(address indexed _burner, uint256 _value);
 	// EIP173
 	event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); // EIP173
-	// Implements Expire
+	event SealStateChange(uint256 _sealState);
 	event Expired(uint256 _timestamp);
-	// Implements Expire
+	event Expired(uint256 _timestamp);
 	event ExpiryChange(uint256 indexed _oldTimestamp, uint256 _newTimestamp);
 	event Cap(uint256 indexed _oldCap, uint256 _newCap);
-	// Implements Seal
+	// property sealing 
 	uint256 public sealState;
-	uint8 constant WRITER_STATE = 1;
+	uint8 constant MINTER_STATE = 1;
 	uint8 constant SINK_STATE = 2;
 	uint8 constant EXPIRY_STATE = 4;
 	uint8 constant CAP_STATE = 8;
 	// Implements Seal
 	uint256 constant public maxSealState = 15;
 	// Implements Seal
 	event SealStateChange(bool indexed _final, uint256 _sealState);
-
+	constructor(string memory _name, string memory _symbol, uint8 _decimals, int128 _taxLevel, uint256 _periodMinutes, address _defaultSinkAddress) {
-	constructor(string memory _name, string memory _symbol, uint8 _decimals, int128 _decayLevel, uint256 _periodMinutes, address _defaultSinkAddress) {
+		require(_taxLevel < (1 << 64));
 		require(_decayLevel < (1 << 64));
 		redistributionItem memory initialRedistribution;
-		//require(ABDKMath64x64.toUInt(_decayLevel) == 0);
+		//require(ABDKMath64x64.toUInt(_taxLevel) == 0);
 		// ACL setup
 		owner = msg.sender;
@ -156,7 +150,7 @@ contract DemurrageTokenSingleNocap {
 		periodDuration = _periodMinutes * 60;
 		demurrageAmount = ABDKMath64x64.fromUInt(1);
-		decayLevel = ABDKMath64x64.ln(_decayLevel);
+		taxLevel = ABDKMath64x64.ln(_taxLevel);
 		initialRedistribution = toRedistribution(0, demurrageAmount, 0, 1);
 		redistributions.push(initialRedistribution);
@ -168,11 +162,11 @@ contract DemurrageTokenSingleNocap {
 		require(_state < 16, 'ERR_INVALID_STATE');
 		require(_state & sealState == 0, 'ERR_ALREADY_LOCKED');
 		sealState |= _state;
-		emit SealStateChange(sealState == maxSealState, sealState);
+		emit SealStateChange(sealState);
 		return uint256(sealState);
 	}
-	function isSealed(uint256 _state) public view returns(bool) {
+	function isSealed(uint256 _state) public returns(bool) {
 		require(_state < maxSealState);
 		if (_state == 0) {
 			return sealState == maxSealState;
@ -180,25 +174,17 @@ contract DemurrageTokenSingleNocap {
 		return _state & sealState == _state;
 	}
 	// Set when token expires. 
 	// Value is set it terms of redistribution periods.
 	// Cannot be set to a time in the past.
 	function setExpirePeriod(uint256 _expirePeriod) public {
 		uint256 r;
 		uint256 oldTimestamp;
 		require(!isSealed(EXPIRY_STATE));
 		require(!expired);
 		require(msg.sender == owner);
 		r = periodStart + (_expirePeriod * periodDuration);
 		require(r > expires);
 		oldTimestamp = expires;
 		expires = r;
 		emit ExpiryChange(oldTimestamp, expires);
 	}
 	// Change max token supply.
 	// Can only increase supply cap, not decrease.
 	function setMaxSupply(uint256 _cap) public {
 		require(!isSealed(CAP_STATE));
 		require(msg.sender == owner);
@ -217,7 +203,6 @@ contract DemurrageTokenSingleNocap {
 	// Expire the contract if expire is set and we have gone over the threshold.
 	// Finalizes demurrage up to the timestamp of the expiry. 
 	// The first approve, transfer or transferFrom call that hits the ex == 2 will get the tx mined. but without the actual effect. Otherwise we would have to wait until an external egent called applyExpiry to get the correct final balance.
 	// Implements Expire
 	function applyExpiry() public returns(uint8) {
 		if (expired) {
 			return 1;
@ -236,33 +221,27 @@ contract DemurrageTokenSingleNocap {
 	}
 	// Given address will be allowed to call the mintTo() function
 	// Implements Writer
 	function addWriter(address _minter) public returns (bool) {
-		require(!isSealed(WRITER_STATE));
+		require(!isSealed(MINTER_STATE));
 		require(msg.sender == owner);
 		minter[_minter] = true;
 		return true;
 	}
 	// Given address will no longer be allowed to call the mintTo() function
 	// Implements Writer
 	function deleteWriter(address _minter) public returns (bool) {
-		require(!isSealed(WRITER_STATE));
+		require(!isSealed(MINTER_STATE));
 		require(msg.sender == owner || _minter == msg.sender);
 		minter[_minter] = false;
 		return true;
 	}
 	// Implements Writer
 	function isWriter(address _minter) public view returns(bool) {
 		return minter[_minter] || _minter == owner;
 	}
 	/// Implements ERC20
 	function balanceOf(address _account) public view returns (uint256) {
 		int128 baseBalance;
 		int128 currentDemurragedAmount;
 		uint256 periodCount;
 		uint8 expiryState;
 		baseBalance = ABDKMath64x64.fromUInt(baseBalanceOf(_account));
@ -280,6 +259,7 @@ contract DemurrageTokenSingleNocap {
 	/// Increases base balance for a single account
 	function increaseBaseBalance(address _account, uint256 _delta) private returns (bool) {
 		uint256 oldBalance;
 		uint256 newBalance;
 		uint256 workAccount;
 		workAccount = uint256(account[_account]);
@ -296,6 +276,7 @@ contract DemurrageTokenSingleNocap {
 	/// Decreases base balance for a single account
 	function decreaseBaseBalance(address _account, uint256 _delta) private returns (bool) {
 		uint256 oldBalance;
 	       	uint256 newBalance;
 		uint256 workAccount;
 		workAccount = uint256(account[_account]);
@ -310,25 +291,13 @@ contract DemurrageTokenSingleNocap {
 		return true;
 	}
 	// Send full balance of one account to another
 	function sweep(address _account) public returns (uint256) {
 		uint256 v;
 		v = account[msg.sender];
 		account[msg.sender] = 0;
 		account[_account] += v;
 		emit Transfer(msg.sender, _account, v);
 		return v;
 	}
 	// Creates new tokens out of thin air, and allocates them to the given address
 	// Triggers tax
-	// Implements Minter
+	function mintTo(address _beneficiary, uint256 _amount) external returns (bool) {
 	function mintTo(address _beneficiary, uint256 _amount) public returns (bool) {
 		uint256 baseAmount;
 		require(applyExpiry() == 0);
-		require(minter[msg.sender] || msg.sender == owner, 'ERR_ACCESS');
+		require(minter[msg.sender], 'ERR_ACCESS');
 		changePeriod();
 		if (maxSupply > 0) {
@ -343,18 +312,6 @@ contract DemurrageTokenSingleNocap {
 		return true;
 	}
 	// Implements Minter
 	function mint(address _beneficiary, uint256 _amount, bytes calldata _data) public {
 		_data;
 		mintTo(_beneficiary, _amount);
 	}
 	// Implements Minter
 	function safeMint(address _beneficiary, uint256 _amount, bytes calldata _data) public {
 		_data;
 		mintTo(_beneficiary, _amount);
 	}
 	// Deserializes the redistribution word
 	function toRedistribution(uint256 _participants, int128 _demurrageModifier, uint256 _value, uint256 _period) public pure returns(redistributionItem memory) {
 		redistributionItem memory redistribution;
@ -362,7 +319,6 @@ contract DemurrageTokenSingleNocap {
 		redistribution.period = uint32(_period);
 		redistribution.value = uint72(_value);
 		redistribution.demurrage = uint64(uint128(_demurrageModifier) & 0xffffffffffffffff);
 		_participants;
 		return redistribution;
 	}
@ -425,7 +381,7 @@ contract DemurrageTokenSingleNocap {
 		return lastRedistribution;
 	}
-	function getDistribution(uint256 _supply, int128 _demurrageAmount) public pure returns (uint256) {
+	function getDistribution(uint256 _supply, int128 _demurrageAmount) public view returns (uint256) {
 		int128 difference;
 		difference = ABDKMath64x64.mul(ABDKMath64x64.fromUInt(_supply), ABDKMath64x64.sub(ABDKMath64x64.fromUInt(1), _demurrageAmount));
@ -433,7 +389,7 @@ contract DemurrageTokenSingleNocap {
 	}
-	function getDistributionFromRedistribution(redistributionItem memory _redistribution) public pure returns (uint256) {
+	function getDistributionFromRedistribution(redistributionItem memory _redistribution) public returns (uint256) {
 		uint256 redistributionSupply;
 		int128 redistributionDemurrage;
@ -481,7 +437,7 @@ contract DemurrageTokenSingleNocap {
 		lastDemurrageAmount = toRedistributionDemurrageModifier(lastRedistribution);
 		demurrageCounts = (periodDuration * currentPeriod) / 60;
 		// TODO refactor decayby to take int128 then DRY with it
-		nextRedistributionDemurrage = ABDKMath64x64.exp(ABDKMath64x64.mul(decayLevel, ABDKMath64x64.fromUInt(demurrageCounts)));
+		nextRedistributionDemurrage = ABDKMath64x64.exp(ABDKMath64x64.mul(taxLevel, ABDKMath64x64.fromUInt(demurrageCounts)));
 		nextRedistribution = toRedistribution(0, nextRedistributionDemurrage, totalSupply(), nextPeriod);
 		redistributions.push(nextRedistribution);
@ -524,7 +480,7 @@ contract DemurrageTokenSingleNocap {
 		}
 		periodPoint = ABDKMath64x64.fromUInt(periodCount);
-		v = ABDKMath64x64.mul(decayLevel, periodPoint);
+		v = ABDKMath64x64.mul(taxLevel, periodPoint);
 		v = ABDKMath64x64.exp(v);
 		demurrageAmount = ABDKMath64x64.mul(demurrageAmount, v);
@ -543,7 +499,6 @@ contract DemurrageTokenSingleNocap {
 		return (block.timestamp - _target) / 60;
 	}
 	// Equality check for empty redistribution data
 	function isEmptyRedistribution(redistributionItem memory _redistribution) public pure returns(bool) {
 		if (_redistribution.period > 0) {
 			return false;
@ -567,7 +522,7 @@ contract DemurrageTokenSingleNocap {
 		valuePoint = ABDKMath64x64.fromUInt(_value);
 		periodPoint = ABDKMath64x64.fromUInt(_period);
-		v = ABDKMath64x64.mul(decayLevel, periodPoint);
+		v = ABDKMath64x64.mul(taxLevel, periodPoint);
 		v = ABDKMath64x64.exp(v);
 		v = ABDKMath64x64.mul(valuePoint, v);
 		return ABDKMath64x64.toUInt(v);
@ -581,8 +536,7 @@ contract DemurrageTokenSingleNocap {
 		return ABDKMath64x64.toUInt(r);
 	}
-	// Triggers tax and/or redistribution
+	// Implements ERC20, triggers tax and/or redistribution
 	// Implements ERC20
 	function approve(address _spender, uint256 _value) public returns (bool) {
 		uint256 baseValue;
 		uint8 ex;
@ -599,14 +553,7 @@ contract DemurrageTokenSingleNocap {
 		changePeriod();
-		// dex code will attempt uint256max approve, but contract cannot handle that size
+		baseValue = toBaseAmount(_value);
 		// truncate to biggest possible value
 		if (_value <= VALUE_LIMIT) {
 			baseValue = toBaseAmount(_value);
 		} else {
 			baseValue = VALUE_LIMIT;
 		}
 		allowance[msg.sender][_spender] = baseValue;
 		emit Approval(msg.sender, _spender, _value);
 		return true;
@ -639,8 +586,7 @@ contract DemurrageTokenSingleNocap {
 		return true;
 	}
-	// Triggers tax and/or redistribution
+	// Implements ERC20, triggers tax and/or redistribution
 	// Implements ERC20
 	function transfer(address _to, uint256 _value) public returns (bool) {
 		uint256 baseValue;
 		bool result;
@ -660,8 +606,7 @@ contract DemurrageTokenSingleNocap {
 		return result;
 	}
-	// Triggers tax and/or redistribution
+	// Implements ERC20, triggers tax and/or redistribution
 	// Implements ERC20
 	function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
 		uint256 baseValue;
 		bool result;
@ -687,6 +632,8 @@ contract DemurrageTokenSingleNocap {
 	// ERC20 transfer backend for transfer, transferFrom
 	function transferBase(address _from, address _to, uint256 _value) private returns (bool) {
 		uint256 period;
 		decreaseBaseBalance(_from, _value);
 		increaseBaseBalance(_to, _value);
@ -695,22 +642,26 @@ contract DemurrageTokenSingleNocap {
 	// Implements EIP173
 	function transferOwnership(address _newOwner) public returns (bool) {
 		require(msg.sender == owner);
 		newOwner = _newOwner;
 	}
 	// Implements OwnedAccepter
 	function acceptOwnership() public returns (bool) {
 		address oldOwner;
-		require(msg.sender == owner);
+		require(msg.sender == newOwner);
 		oldOwner = owner; 
-		owner = _newOwner;
+		owner = newOwner;
-
+		newOwner = address(0);
 		emit OwnershipTransferred(oldOwner, owner);
 		return true;
 	}
 	// Explicitly and irretrievably burn tokens
 	// Only token minters can burn tokens
-	// Implements Burner
+	function burn(uint256 _value) public {
 	function burn(uint256 _value) public returns(bool) {
 		require(applyExpiry() == 0);
-		require(minter[msg.sender] || msg.sender == owner, 'ERR_ACCESS');
+		require(minter[msg.sender]);
 		require(_value <= account[msg.sender]);
 		uint256 _delta = toBaseAmount(_value);
@ -718,19 +669,6 @@ contract DemurrageTokenSingleNocap {
 		decreaseBaseBalance(msg.sender, _delta);
 		burned += _value;
 		emit Burn(msg.sender, _value);
 		return true;
 	}
 	// Implements Burner
 	function burn(address _from, uint256 _value, bytes calldata _data) public {
 		require(_from == msg.sender, 'ERR_ONLY_SELF_BURN');
 		_data;
 		burn(_value);
 	}
 	// Implements Burner
 	function burn() public returns(bool) {
 		return burn(account[msg.sender]);
 	}
 	// Implements ERC20
@ -739,45 +677,25 @@ contract DemurrageTokenSingleNocap {
 	}
 	// Return total number of burned tokens
 	// Implements Burner
 	function totalBurned() public view returns (uint256) {
 		return burned;
 	}
 	// Return total number of tokens ever minted
 	// Implements Burner
 	function totalMinted() public view returns (uint256) {
 		return supply;
 	}
 	// Implements EIP165
 	function supportsInterface(bytes4 _sum) public pure returns (bool) {
-		if (_sum == 0xb61bc941) { // ERC20
+		if (_sum == 0xc6bb4b70) { // ERC20
 			return true;
 		}
-		if (_sum == 0x5878bcf4) { // Minter
+		if (_sum == 0x449a52f8) { // Minter
 			return true;
 		}
-		if (_sum == 0xbc4babdd) { // Burner
+		if (_sum == 0x01ffc9a7) { // EIP165
 			return true;
 		}
-		if (_sum == 0x0d7491f8) { // Seal
+		if (_sum == 0x9493f8b2) { // EIP173
 			return true;
 		}
-		if (_sum == 0xabe1f1f5) { // Writer
+		if (_sum == 0x37a47be4) { // OwnedAccepter
 			return true;
 		}
 		if (_sum == 0x841a0e94) { // Expire
 			return true;
 		}
 		if (_sum == 0x01ffc9a7) { // ERC165
 			return true;
 		}
 		if (_sum == 0x9493f8b2) { // ERC173
 			return true;
 		}
 		if (_sum == 0xd0017968) { // ERC5678Ext20
 			return true;
 		}
 		return false;
--- a/solidity/Makefile
+++ b/solidity/Makefile
@ -5,7 +5,6 @@ all: single_nocap
 single_nocap:
 	$(SOLC) DemurrageTokenSingleNocap.sol --abi --evm-version byzantium | awk 'NR==4' > DemurrageTokenSingleNocap.json
 	$(SOLC) DemurrageTokenSingleNocap.sol --bin --evm-version byzantium | awk 'NR==4' > DemurrageTokenSingleNocap.bin
 	$(SOLC) DemurrageTokenSingleNocap.sol --metadata --evm-version byzantium | awk 'NR==4' > DemurrageTokenSingleNocap.metadata.json
 	truncate -s -1 DemurrageTokenSingleNocap.bin
 single: single_nocap
		`@ -1 +0,0 @@`
			`The contract is intended for slow rates of decay (e.g. 2% per month). Very high levels of decay (2% per minute) will lead to overflows, and will need a more flexible implementation to support it.`
`@ -1 +1 @@`
	`include erc20_demurrage_token/data/* erc20_demurrage_token/data/config/.ini requirements.txt man/build/*.1`	`include erc20_demurrage_token/data/* erc20_demurrage_token/data/config/.ini requirements.txt`