Tokens (USDT, USDC, IMC)

ERC-20 token contracts deployed on Celo Sepolia.

Token Registry

Symbol	Name	Contract	Decimals	Deployer
USDT	Tether USD (mock)	0x3C8EB6c8DF02B43a7bae71314917aCBdd60edDDF	6	Relayer (0x40e4F07Dfd80A3043577142df072Afe3E4653928)
USDC	USD Coin (mock)	0x82DD8420f1a403a947c6cFFBFaEa81e0296262A7	6	Relayer (0x40e4F07Dfd80A3043577142df072Afe3E4653928)
IMC	ImpalaCoin	0xF150E30B1C7Ab81938d650567D1454Ee0132d5A2	6	Relayer (0x40e4F07Dfd80A3043577142df072Afe3E4653928)

ERC-20 Functions Used

Function	Caller	Description
mint(address to, uint256 amount)	Relayer	Mint tokens to user wallet
burn(address from, uint256 amount)	Relayer	Burn tokens (via approval)
approve(address spender, uint256 amount)	User wallet	Approve router/spender
transfer(address to, uint256 amount)	User wallet	Direct transfer
balanceOf(address owner)	Comet Engine	Query balance
allowance(address owner, address spender)	Comet Engine	Check allowance

Gas Pattern

All token operations use gas relaying:

1. ensureGas() checks user wallet CELO balance
2. If below threshold, tops up from relayer
3. User signs the transaction (key decrypted in memory)
4. Transaction is sent with relayer's nonce

Import Addresses

Solidity imports use named imports:

import { IERC20 as IERC20ForRouter } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

Deploying New Tokens

1. Write contract inheriting from ERC20, Ownable
2. Add CELO_<SYMBOL>_CONTRACT env var to comet-engine
3. Engine auto-discovers the asset at startup
4. Add symbol mapping to frontend (FusionFy, app-dashboard)