Add delta allowance, approve sets explicit value

This commit is contained in:
lash 2023-01-05 13:36:40 +00:00
parent 166302ef49
commit 4f1bd36c12
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
7 changed files with 112 additions and 6 deletions

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@ -1,7 +1,9 @@
- 0.1.2 - 0.2.0
* Add token burn function * Add token burn function
* Fix gas leak when calculating decay on period change * Fix gas leak when calculating decay on period change
* Remove all but SingleNocap contract in make install * Remove all but SingleNocap contract in make install
* Make approve explicitly set value
* Add increaseAllowance and decreaseAllowance methods
- 0.1.1 - 0.1.1
* Settable demurrage steps for apply demurrage cli tool * Settable demurrage steps for apply demurrage cli tool
- 0.1.0 - 0.1.0

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@ -117,6 +117,34 @@ class DemurrageToken(ERC20):
return DemurrageToken.__bytecode[name] return DemurrageToken.__bytecode[name]
def increase_allowance(self, contract_address, sender_address, address, value, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('increaseAllowance')
enc.typ(ABIContractType.ADDRESS)
enc.typ(ABIContractType.UINT256)
enc.address(address)
enc.uint256(value)
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 decrease_allowance(self, contract_address, sender_address, address, value, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('decreaseAllowance')
enc.typ(ABIContractType.ADDRESS)
enc.typ(ABIContractType.UINT256)
enc.address(address)
enc.uint256(value)
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 add_minter(self, contract_address, sender_address, address, tx_format=TxFormat.JSONRPC): def add_minter(self, contract_address, sender_address, address, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder() enc = ABIContractEncoder()
enc.method('addMinter') enc.method('addMinter')

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@ -1,6 +1,6 @@
[metadata] [metadata]
name = erc20-demurrage-token name = erc20-demurrage-token
version = 0.1.2 version = 0.2.0
description = ERC20 token with redistributed continual demurrage description = ERC20 token with redistributed continual demurrage
author = Louis Holbrook author = Louis Holbrook
author_email = dev@holbrook.no author_email = dev@holbrook.no

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@ -277,6 +277,51 @@ class TestBasic(TestDemurrageDefault):
self.assertEqual(r['status'], 1) self.assertEqual(r['status'], 1)
def test_approve(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], 500)
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], 600)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 0)
(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)
(tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 600)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.increase_allowance(self.address, self.accounts[0], self.accounts[1], 200)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.decrease_allowance(self.address, self.accounts[0], self.accounts[1], 800)
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], 42)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
def test_transfer_from(self): def test_transfer_from(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc) nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)

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@ -425,14 +425,45 @@ contract DemurrageTokenSingleCap {
function approve(address _spender, uint256 _value) public returns (bool) { function approve(address _spender, uint256 _value) public returns (bool) {
uint256 baseValue; uint256 baseValue;
if (allowance[msg.sender][_spender] > 0) {
require(_value == 0, 'ZERO_FIRST');
}
changePeriod(); changePeriod();
baseValue = toBaseAmount(_value); baseValue = toBaseAmount(_value);
allowance[msg.sender][_spender] += baseValue; allowance[msg.sender][_spender] = baseValue;
emit Approval(msg.sender, _spender, _value); emit Approval(msg.sender, _spender, _value);
return true; return true;
} }
// Reduce allowance by amount
function decreaseAllowance(address _spender, uint256 _value) public returns (bool) {
uint256 baseValue;
baseValue = toBaseAmount(_value);
require(allowance[msg.sender][_spender] <= baseValue);
changePeriod();
allowance[msg.sender][_spender] -= baseValue;
emit Approval(msg.sender, _spender, allowance[msg.sender][_spender]);
return true;
}
// Increase allowance by amount
function increaseAllowance(address _spender, uint256 _value) public returns (bool) {
uint256 baseValue;
changePeriod();
baseValue = toBaseAmount(_value);
allowance[msg.sender][_spender] += baseValue;
emit Approval(msg.sender, _spender, allowance[msg.sender][_spender]);
return true;
}
// Implements ERC20, triggers tax and/or redistribution // Implements ERC20, triggers tax and/or redistribution
function transfer(address _to, uint256 _value) public returns (bool) { function transfer(address _to, uint256 _value) public returns (bool) {
uint256 baseValue; uint256 baseValue;