Zero unit token operations in smart contracts

[littletarzan]

Problem

Integer rounding will naturally lead to DeFi contracts sometimes minting or transferring 0 units of a token. But the network rejects 0 units in these operations, forcing contract developers to include special cases that would not be necessary on most networks. See the following ERC20 mint token snippet:

function mint(uint amount) external {
        balanceOf[msg.sender] += amount;
        totalSupply += amount;
        emit Transfer(address(0), msg.sender, amount);
    }

Solution

We propose to allow token transfers, mints, and burns to succeed as no-ops when given 0 units of a token. This will align with developer expectations of an ERC-20 contract.

Alternatives

No response