Address

Address

Git Source

Collection of functions related to the address type

Functions

sendValue

Replacement for Solidity's transfer: sends amount wei to recipient, forwarding all available gas and reverting on errors. https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost of certain opcodes, possibly making contracts go over the 2300 gas limit imposed by transfer, making them unable to receive funds via transfer. sendValue removes this limitation. https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. IMPORTANT: because control is transferred to recipient, care must be taken to not create reentrancy vulnerabilities. Consider using {ReentrancyGuard} or the https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].

Sends _amount wei to _receiver, forwarding all available gas and reverting on errors. This function is a replacement for Solidity's transfer which has a limitation due to EIP1884.

function sendValue(address _receiver, uint256 _amount) internal;

Parameters

Name	Type	Description
_receiver	address	The address of the recipient.
_amount	uint256	The amount to be sent.

transferFrom

Transfers ERC-721 tokens to the buyer via transferFrom rather than safeTransferFrom. The caller is responsible to confirm that the recipient if a contract is capable of receiving and handling ERC721 and ERC1155 tokens.

Send token to receiver, either ERC721 or ERC20 as they both have the same function signature for transferFrom bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd

function transferFrom(address _token, address _from, address _to, uint256 _tokenIdOrERC20Value) internal;