TransferHelper

This library provides helper methods for interacting with ERC20 tokens and sending ETH. These methods ensure safe and reliable token transfers by checking the success of the transfer operations.

Internal Functions

safeApprove

Safely approves the specified to address to spend the specified value amount of tokens from the token contract. It uses the approve function of the ERC20 token.

Parameters

Name	Type	Description
token	address	The address of the ERC20 token contract.
to	address	The address to approve for spending the tokens.
value	uint	The amount of tokens to approve.

safeTransfer

Safely transfers the specified value amount of tokens from the caller's address to the to address. It uses the transfer function of the ERC20 token.

Parameters

Name	Type	Description
token	address	The address of the ERC20 token contract.
to	address	The address to which the tokens should be transferred.
value	uint	The amount of tokens to transfer.

safeTransferFrom

Safely transfers the specified value amount of tokens from the from address to the to address. It uses the transferFrom function of the ERC20 token.

Parameters

Name	Type	Description
token	address	The address of the ERC20 token contract.
from	address	The address from which the tokens should be transferred.
to	address	The address to which the tokens should be transferred.
value	uint	The amount of tokens to transfer.

safeTransferETH

Safely sends the specified value amount of Ether to the to address.

Parameters

Name	Type	Description
to	address	The address to which the Ether should be sent.
value	uint	The amount of Ether to send.

decimals

Retrieves the number of decimal places used by the specified ERC20 token contract.

Parameters

Name	Type	Description
token	address	The address of the ERC20 token contract.

Returns

Name	Type	Description
decimals	uint8	The number of decimal places used by the token.