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token-bridge-solidity

TON-EVM token bridge - Solidity smart contracts

Developed by RSquad by order of TON Foundation.

Run tests

npm run test

Deploy

⚠️ NOTE: It is preferable that the number of oracles will be divisible by 3. Note that in other cases minimum consensus is floor((2 * oracleSet.length + 2) / 3). For example, 4 oracles required 3 signatures. It's different from the Toncoin bridge.

change PRIVATE_KEY, GOERLI_ENDPOINT, BSC_TESTNET_ENDPOINT in .env.

Ethereum Goerli Testnet:

npm run deploy-test-token-goerli
npm run deploy-bridge-goerli

BSC Testnet:

npm run deploy-test-token-bsc-testnet
npm run deploy-bridge-bsc-testnet

Code

Based on Toncoin Bridge.

  • TonUtils - token address added to SwapData. TonAddress replaced by address_hash because all tokens and token owners in workchain = 0.

  • SignatureChecker - getSwapDataId: token address and chainId added to signing data, workchain removed from signing data; 'uint64 amount' -> 'uint256 amount'; cosmetic changes;

      `checkSignature`
  
  `getNewSetId` - `chainId` added to signing data
  
  `getNewBurnStatusId` renamed to `getNewLockStatusId`, `chainId` added to signing data

  • Bridge

      `SwapEthToTon` renamed to `Lock`, some fields removed and added
 
  `SwapTonToEth` renamed to `Unlock`, some fields removed and added
 
  `burn` -> `lock`, new functionality
 
  `voteForMinting` -> `unlock`, new functionality
 
  `voteForNewOracleSet` same
 
  `allowBurn` renamed to `allowLock`
 
  `voteForSwitchBurn` renamed to `voteForSwitchLock`
 
  cosmetic changes and optimizations

Etherscan code verification

Add to the end of hardhat.config.ts you api key of etherscan or bscscan

  etherscan: {
    apiKey: "123ABC",
  },

Use etherscan field for bscscan too.

Make arguments.js file with init oracle addresses array:

module.exports = [
    [
        '0xeb05E1B6AC0d574eF2CF29FDf01cC0bA3D8F9Bf1',
        '0xe54CD631C97bE0767172AD16904688962d09d2FE',
        '0xF636f40Ebe17Fb2A1343e5EEee9D13AA90888b51'
    ]
];

Run command

npx hardhat verify --network bsc_testnet --constructor-args arguments.js 0xADDRESS_OF_BRIDGE_CONTRACT