# x/bDAI Migration spec

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* Authors: Will Ruddick <will@grassecon.org>
* Date: 2020.04.22
* Version: 1
* Status: Pre-draft

## Rationale
We want to give donors and community members a way to contribute to and cash-out from Community Inclusion Currencies with National Currency. 
By connecting to a reserve that is stable to the US dollar called x/bDAI we bring some stability and the ability for many to support local communities. 
We also enable any CICs that have bDAI as a reserve to convert to any other CIC with bDAI as reserve. 

## Before 
Currently we are using a virtual reserve a generic ERC20 token. We have 2 Million of those reserve tokens against 8 Million Sarafu issued (the current Kenyan CIC). (Call those Sarafu_1 or S1)

## After
We have 40,000 DAI to bridge to a bDAI token and put as the reserve and are looking at minting (16Million) tokens (called Sarafu_2 S2)
with a connector weight (target Reserve Ratio) of 0.25 (25%) and an inital price of roughly 100 Sarafu to 1 xDAI (USD stable) 
(Note that the 100 Sarafu to 1 xDAI will approximate the Kenyan Shillings to USD rate)

## Implementation

Each existing user should have a completley new wallet and private key for security reasons and be given the same balances they currently have with the new (bDAI reserve) Sarafu. Roughly 8Million Sarafu_1 in wallet will be replaced with Sarafu_2

### Workflow

1. Bridge bDAI to DAI on BloxBerg
1. Setup an onserver node on BloxBerg
1. Synch db <->Blockchain - ensure synronization between our db (USSD interface) and blockchain
1. (delayed) Finalize any contract changes to Bancor Suite (such as [Depth Bump](https://gitlab.com/grassrootseconomics/cic-docs/-/blob/master/spec/003_depth_bump.md)) 
1. Understand all Public vs Private (owner owned) Functions - Make all contracts as permissionless as possible
1. Create group of govenors on a multi-sig wallet with the power to assign the facilitator address of all blockchain contracts (Bancor Suite). 
1. Security checkes
1. Deploy contracts to create Sarafu_2, set inital variables - deposit reserve and mint tokens
1. Migration - New wallets for users - Replicate user accounts with new token Sarafu_2 - ensure private keys are safely stored 

### Variables

1. Synch variables, - synch frequency - and limitations
2. Contract variables (reserve ratio (0.25), reserve amount (40k bDAI), number of Sarafu_2 (16Million), convert fee 0.005 (0.5%))
3. Migration speed - how often is synching done between USSD db and blockchain
4. 3rd party Fiat <-> bDAI conversion costs and speed

### Interface
This migration will all be done at code and command line level, while some testing can be done on the platform gui

## Testing
1. Check bDAI to DAI on bridge on BloxBerg
1. Test observer node on BloxBerg for dashboard
1. Check db<->blockchain synch - verify they are synched and we can do external transactions and handle RPC failure
1. Token Governance
1. Contract deplyment - conversions, transfers all work as expected 
1. Migration - new wallets match old wallets
1. Store old blockchain wallet IDs (as a list with older POA and xDAI wallets)


## Changelog
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* version 1:
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