TransferHelper.sol

This Solidity library provides a set of helper methods for safely interacting with ERC20 tokens and transferring Ethereum (ETH). It includes functions for approving, transferring, transferring from a particular address, and transferring ETH. These functions are designed to handle ERC20 tokens that do not consistently return true or false.

TransferHelper

A library that provides helper methods for safely interacting with ERC20 tokens and transferring Ethereum (ETH).

safeApprove

function safeApprove(address token, address to, uint value) internal

Approves the transfer of a certain amount of tokens to a given address. Throws an error if the operation fails.

Parameters

token address: The address of the ERC20 token contract.
to address: The address to approve the transfer to.
value uint: The amount of tokens to approve for transfer.

Return Values

void: No return value.

Errors

'TransferHelper: APPROVE_FAILED': Thrown if the approval operation fails.

safeTransfer

function safeTransfer(address token, address to, uint value) internal

Transfers a certain amount of tokens to a given address. Throws an error if the operation fails.

Parameters

token address: The address of the ERC20 token contract.
to address: The address to transfer the tokens to.
value uint: The amount of tokens to transfer.

Return Values

void: No return value.

Errors

'TransferHelper: TRANSFER_FAILED': Thrown if the transfer operation fails.

safeTransferFrom

function safeTransferFrom(address token, address from, address to, uint value) internal

Transfers a certain amount of tokens from a specific address to another. Throws an error if the operation fails.

Parameters

token address: The address of the ERC20 token contract.
from address: The address to transfer the tokens from.
to address: The address to transfer the tokens to.
value uint: The amount of tokens to transfer.

Return Values

void: No return value.

Errors

'TransferHelper: TRANSFER_FROM_FAILED': Thrown if the transfer operation fails.

safeTransferETH

function safeTransferETH(address to, uint value) internal

Transfers a certain amount of ETH to a given address. Throws an error if the operation fails.

Parameters

to address: The address to transfer the ETH to.
value uint: The amount of ETH to transfer.

Return Values

void: No return value.

Errors

'TransferHelper: ETH_TRANSFER_FAILED': Thrown if the ETH transfer operation fails.