EVM and Tron Settlement

• Cross-chain swap
• Cross-chain swap with DEX
• Single-chain atomic swap
• Fast refund

​

Onboarding

• Executor contract address
• depositAddresses allow list
• withdrawAddresses allow list

​

Executor contract

function fulfill(
  address token,
  uint256 minAmount,
  uint256 maxAmount,
  bytes data
) external returns (uint256 amount);

function swap(
  address outputToken,
  uint256 minOutputAmount,
  uint256 maxOutputAmount,
  address inputToken,
  uint256 inputAmount,
  bytes data
) external returns (uint256 amount);

function dexSwap(
  address outputToken,
  uint256 minOutputAmount,
  uint256 maxOutputAmount,
  address inputToken,
  uint256 inputAmount,
  bytes data
) external returns (uint256 amount);

​

Method responsibilities

• fulfill transfers between minAmount and maxAmount to the caller and returns the actual transferred amount.
• swap receives input tokens already transferred to the Executor and returns a bounded output to EscrowRouter.
• dexSwap uses only deposited user tokens with non-empty routing data.

​

Fulfillment contract

• Executor address
• Authorized caller/operator addresses

​

Cross-chain swap

​

Cross-chain swap with DEX

​

Single-chain atomic swap

​

Fast refund

FastRefund(bytes32 orderHash)

​

Tron

• No version field in the domain.
• Domain type string: EIP712Domain(string name,uint256 chainId,address verifyingContract).
• chainId is masked with chainId & 0xffffffff.