2025-08-20 14:16:50 +02:00

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# TestStableToken
The waku-rlnv2-contract [spec](https://github.com/waku-org/specs/blob/master/standards/core/rln-contract.md) defines
that DAI is to be used to pay for membership registration, with the end-goal being to deploy the contract on mainnet
using an existing stable DAI token.
Before this, we need to perform extensive testing on testnet and local environments (such as
[waku-simulator](https://github.com/waku-org/waku-simulator)). During initial testing, we discovered the need to manage
token minting in testnet environments to limit membership registrations and enable controlled testing of the contract.
TestStableToken is our custom token implementation designed specifically for testing environments, providing controlled
token distribution while mimicking DAI's behaviour.
## Requirements
- **Controlled minting**: Manage token minting through an allowlist of approved accounts, controlled by the token
contract owner
- **ETH burning mechanism**: Burn ETH when minting tokens to create economic cost (WIP)
- **Proxy architecture**: Use a proxy contract to minimize updates required when the token address changes across other
components (e.g., nwaku-compose repo or dogfooding instructions)
## Usage
### Deploy new TestStableToken with proxy contract
```bash
forge script script/DeployTokenWithProxy.s.sol:DeployTokenWithProxy --rpc-url $RPC_URL --private-key $PRIVATE_KEY --broadcast
```
### Deploy only TestStableToken contract implementation
```bash
forge script test/TestStableToken.sol:TestStableTokenFactory --tc TestStableTokenFactory --rpc-url $RPC_URL --private-key $PRIVATE_KEY --broadcast
```
### Update the proxy contract to point to the new implementation
```bash
# Upgrade the proxy to a new implementation
cast send $TOKEN_PROXY_ADDRESS "upgradeTo(address)" $NEW_IMPLEMENTATION_ADDRESS --rpc-url $RPC_URL --private-key $PRIVATE_KEY
```
### Add account to the allowlist to enable minting
```bash
cast send $TOKEN_PROXY_ADDRESS "addMinter(address)" $ACCOUNT_ADDRESS --rpc-url $RPC_URL --private-key $PRIVATE_KEY
```
### Mint tokens to the account
```bash
cast send $TOKEN_PROXY_ADDRESS "mint(address,uint256)" <TO_ADDRESS> <AMOUNT> --rpc-url $RPC_URL --private-key $MINTER_ACCOUNT_PRIVATE_KEY
```
### Approve the token for the waku-rlnv2-contract to use
```bash
cast send $TOKEN_PROXY_ADDRESS "approve(address,uint256)" $TOKEN_SPENDER_ADDRESS <AMOUNT> --rpc-url $RPC_URL --private-key $PRIVATE_KEY
```
### Remove the account from the allowlist to prevent further minting
```bash
cast send $TOKEN_PROXY_ADDRESS "removeMinter(address)" $ACCOUNT_ADDRESS --rpc-url $RPC_URL --private-key $PRIVATE_KEY
```
### Query token information
```bash
# Check if an account is a minter
cast call $TOKEN_PROXY_ADDRESS "isMinter(address)" $ACCOUNT_ADDRESS --rpc-url $RPC_URL
# Check token balance
cast call $TOKEN_PROXY_ADDRESS "balanceOf(address)" $ACCOUNT_ADDRESS --rpc-url $RPC_URL
# Check token allowance
cast call $TOKEN_PROXY_ADDRESS "allowance(address,address)" $TOKEN_OWNER_ADDRESS $TOKEN_SPENDER_ADDRESS --rpc-url $RPC_URL
```