Sep 7, 2018 · 1 min read
Hey David. What would you do to store data like the following, taken from a standard-ish ERC20 contract?
mapping(address => uint256) _balances;
mapping(address => mapping( address => uint )) _approvals;
Would you just add new mappings like these to your storage?
mapping(bytes32 => mapping( address => uint )) _balances;
mapping(bytes32 => mapping( address => mapping( address => uint ))) _approvals;
