Last update: September 30, 2021

TridentHelper

Trident router helper contract.

Functions

  function constructor(
  ) public

  function batch(
    bytes[] data
  ) external returns (bytes[] results)

Provides batch function calls for this contract and returns the data from all of them if they all succeed. Adapted from https://github.com/Uniswap/uniswap-v3-periphery/blob/main/contracts/base/Multicall.sol, License-Identifier: GPL-2.0-or-later.

The msg.value should not be trusted for any method callable from this function.

Name	Type	Description
`data`	bytes[]	ABI-encoded params for each of the calls to make to this contract.

Name	Type	Description
`results`	bytes[]	The results from each of the calls passed in via `data`.

  function balanceOfThis(
    address token
  ) internal returns (uint256 balance)

Provides gas-optimized balance check on this contract to avoid redundant extcodesize check in addition to returndatasize check.

Name	Type	Description
`token`	address	Address of ERC-20 token.

Name	Type	Description
`balance`	address	Token amount held by this contract.

  function permitThis(
    address token,
    uint256 amount,
    uint256 deadline,
    uint8 v,
    bytes32 r,
    bytes32 s
  ) external

Provides EIP-2612 signed approval for this contract to spend user tokens.

Name	Type	Description
`token`	address	Address of ERC-20 token.
`amount`	uint256	Token amount to grant spending right over.
`deadline`	uint256	Termination for signed approval (UTC timestamp in seconds).
`v`	uint8	The recovery byte of the signature.
`r`	bytes32	Half of the ECDSA signature pair.
`s`	bytes32	Half of the ECDSA signature pair.

  function permitThisAllowed(
    address token,
    uint256 nonce,
    uint256 expiry,
    uint8 v,
    bytes32 r,
    bytes32 s
  ) external

Provides DAI-derived signed approval for this contract to spend user tokens.

Name	Type	Description
`token`	address	Address of ERC-20 token.
`nonce`	uint256	Token owner’s nonce - increases at each call to
`expiry`	uint256	Termination for signed approval - UTC timestamp in seconds.
`v`	uint8	The recovery byte of the signature.
`r`	bytes32	Half of the ECDSA signature pair.
`s`	bytes32	Half of the ECDSA signature pair.

  function safeTransfer(
    address token,
    address recipient,
    uint256 amount
  ) internal

Provides ‘safe’ ERC-20 {transfer} for tokens that don’t consistently return true/false.

  function safeTransferFrom(
    address token,
    address sender,
    address recipient,
    uint256 amount
  ) internal

Provides ‘safe’ ERC-20 {transferFrom} for tokens that don’t consistently return true/false.

  function withdrawFromWETH(
    uint256 amount
  ) internal

Provides low-level wETH {withdraw}.

Name	Type	Description
`amount`	uint256	Token amount to unwrap into ETH.

  function safeTransferETH(
    address recipient,
    uint256 amount
  ) internal

Provides ‘safe’ ETH transfer.

Name	Type	Description
`recipient`	address	Account to send ETH to.
`amount`	uint256	ETH amount to send.

  function getSelector(
    bytes _data
  ) internal returns (bytes4 sig)

function to extract the selector of a bytes calldata

Name	Type	Description
`_data`	bytes	the calldata bytes