Meson in Solidity

We have implemented the Meson protocol with Solidity smart contracts, and deployed to the following EVM-compatible public chains:

The chain-specific invariants are given in the MesonConfig.sol file. The compile and deploy script will automatically set this config file.

SHORT_COIN_TYPE (uint16): The identifier of the chain. We use the last 2 bytes of SLIP-44 as the unique ID of a chain:

Chain

Short Coin Type

Ethereum

0x003c

Tron

0x00c3

Conflux

0x01f7

Optimism

0x0266

BNB Chain

0x02ca

Polygon

0x03c6

Fantom

0x03ef

Harmony

0x03ff

Moonbeam

0x0504

Moonriver

0x0505

Aurora

0x0a0a

Evmos

0x11bc

Avalanche

0x2328

Arbitrum

0x2329

MIN_BOND_TIME_PERIOD (uint256) & MAX_BOND_TIME_PERIOD (uint256): The minimal and maximum expire time when bonding a swap, set to 1 hour and 2 hours, respectively. The swap encoding will include a timestamp expireTs before which the user's assets will be locked on the initial chain. The LP should call executeSwap before expireTs to take away the swapping fund. The expireTs needs to satisfy ts_bonded_tx + MIN_BOND_TIME_PERIOD < expireTs < ts_bonded_tx + MAX_BOND_TIME_PERIOD, where ts_bonded_tx is the block time for the executed postSwap transaction.
LOCK_TIME_PERIOD (uint256): The time length when an LP locks a swap, sets to 40 minutes. The initiator should sign the release signature to get swapped assets on the target chain before the time ts_locked_tx + LOCK_TIME_PERIOD, where ts_locked_tx is the block time for the executed lock transaction.
REQUEST_TYPE_HASH (bytes32): Equals to keccak256(bytes32 "Sign to request a swap on Meson") or keccak256(bytes32 "Sign to request a swap on Meson (Testnet)"). It's used when checking the request signature.
RELEASE_TYPE_HASH (bytes32): Equals to keccak256(bytes32 "Sign to release a swap on Meson" + bytes32 [Recipient]) or keccak256(bytes32 "Sign to release a swap on Meson (Testnet)" + bytes32 "[Recipient]"). It's used when checking the release signature.

Last updated 2 years ago