Hi, I used the ERC20 implementation of openzeppelin contracts on my test token and I've found two functions which really confused me: increaseAllowance and decreaseAllowance :1234: The Code /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * Th…

Emmmm, they can use increaseAllowance and decreaseAllowance, but some tokens can not increase form a non-zero value. If user want to swap some USDT to get 1 Eth, assume 1 eth = 100 USDT, cause there will be slippage, so you are expect to approve a larger amount, maybe call increaseAllowance(110), b…

Explain the practical use of increaseAllowance and decreaseAllowance functions on ERC20

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Skyge Split this topic March 3, 2022, 4:56am 7

5 posts were split to a new topic: Token transfer rejected

Topic		Replies	Views
increaseAllowance and decreaseAllowance ERC20 Support erc20	6	208	February 19, 2024
'ERC20: insufficient allowance' (again) Smart Contracts erc20	3	2724	October 25, 2022
Help understanding functions in ERC20 standard token contract Smart Contracts	0	396	April 6, 2022
Why increaseAllowance and decreaseAllowance are removed from v5.x? Support erc20 , solidity	3	253	January 10, 2024
Approval compatibility Smart Contracts erc20 , solidity	9	806	August 22, 2023

Explain the practical use of increaseAllowance and decreaseAllowance functions on ERC20

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