Solidity API

ERC20Extended

This contract inherits from:

• IERC20Extended: Interface defining the extended approval functions
• ERC20ExtendedInternal: Internal implementation of the extended functions

Implements safe approval extensions for the ERC20 standard This contract provides enhanced approval functionality to mitigate the transaction-ordering vulnerability in the standard ERC20 approve method (see https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729)

increaseAllowance

function increaseAllowance(address spender, uint256 amount) external returns (bool)

Increase the allowance granted to a spender

_External wrapper for increaseAllowance internal function Allows users to increase the amount a spender is allowed to transfer on their behalf without having to set the allowance to zero first

Parameters

Name	Type	Description
spender	address	Address to be granted increased spending rights
amount	uint256	The additional amount to add to the current allowance

Return Values

Name	Type	Description
[0]	bool	success True if the operation succeeded

decreaseAllowance

function decreaseAllowance(address spender, uint256 amount) external returns (bool)

Decrease the allowance granted to a spender

_External wrapper for decreaseAllowance internal function Allows users to reduce the amount a spender is allowed to transfer on their behalf in a safe way

Parameters

Name	Type	Description
spender	address	Address whose spending rights will be reduced
amount	uint256	The amount to subtract from the current allowance

Return Values

Name	Type	Description
[0]	bool	success True if the operation succeeded