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CALLVALUE is a better 0 than just 0 #4

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CALLVALUE is a better 0 than just 0 #4

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908cceb
returndatasize
wjmelements Jun 4, 2020
f2b40ad
callvalue is zero
wjmelements Jun 4, 2020
2f5c1d2
do not add zero
wjmelements Jun 4, 2020
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38 changes: 19 additions & 19 deletions contracts/ChiToken.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -84,30 +84,30 @@ contract ChiToken is IERC20, ERC20WithoutTotalSupply {
function mint(uint256 value) public {
uint256 offset = totalMinted;
assembly {
mstore(0, 0x746d4946c0e9F43F4Dee607b0eF1fA1c3318585733ff6000526015600bf30000)
mstore(callvalue(), 0x746d4946c0e9F43F4Dee607b0eF1fA1c3318585733ff6000526015600bf30000)

for {let i := div(value, 32)} i {i := sub(i, 1)} {
pop(create2(0, 0, 30, add(offset, 0))) pop(create2(0, 0, 30, add(offset, 1)))
pop(create2(0, 0, 30, add(offset, 2))) pop(create2(0, 0, 30, add(offset, 3)))
pop(create2(0, 0, 30, add(offset, 4))) pop(create2(0, 0, 30, add(offset, 5)))
pop(create2(0, 0, 30, add(offset, 6))) pop(create2(0, 0, 30, add(offset, 7)))
pop(create2(0, 0, 30, add(offset, 8))) pop(create2(0, 0, 30, add(offset, 9)))
pop(create2(0, 0, 30, add(offset, 10))) pop(create2(0, 0, 30, add(offset, 11)))
pop(create2(0, 0, 30, add(offset, 12))) pop(create2(0, 0, 30, add(offset, 13)))
pop(create2(0, 0, 30, add(offset, 14))) pop(create2(0, 0, 30, add(offset, 15)))
pop(create2(0, 0, 30, add(offset, 16))) pop(create2(0, 0, 30, add(offset, 17)))
pop(create2(0, 0, 30, add(offset, 18))) pop(create2(0, 0, 30, add(offset, 19)))
pop(create2(0, 0, 30, add(offset, 20))) pop(create2(0, 0, 30, add(offset, 21)))
pop(create2(0, 0, 30, add(offset, 22))) pop(create2(0, 0, 30, add(offset, 23)))
pop(create2(0, 0, 30, add(offset, 24))) pop(create2(0, 0, 30, add(offset, 25)))
pop(create2(0, 0, 30, add(offset, 26))) pop(create2(0, 0, 30, add(offset, 27)))
pop(create2(0, 0, 30, add(offset, 28))) pop(create2(0, 0, 30, add(offset, 29)))
pop(create2(0, 0, 30, add(offset, 30))) pop(create2(0, 0, 30, add(offset, 31)))
pop(create2(callvalue(), callvalue(), 30, offset)) pop(create2(callvalue(), callvalue(), 30, add(offset, 1)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 2))) pop(create2(callvalue(), callvalue(), 30, add(offset, 3)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 4))) pop(create2(callvalue(), callvalue(), 30, add(offset, 5)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 6))) pop(create2(callvalue(), callvalue(), 30, add(offset, 7)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 8))) pop(create2(callvalue(), callvalue(), 30, add(offset, 9)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 10))) pop(create2(callvalue(), callvalue(), 30, add(offset, 11)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 12))) pop(create2(callvalue(), callvalue(), 30, add(offset, 13)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 14))) pop(create2(callvalue(), callvalue(), 30, add(offset, 15)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 16))) pop(create2(callvalue(), callvalue(), 30, add(offset, 17)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 18))) pop(create2(callvalue(), callvalue(), 30, add(offset, 19)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 20))) pop(create2(callvalue(), callvalue(), 30, add(offset, 21)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 22))) pop(create2(callvalue(), callvalue(), 30, add(offset, 23)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 24))) pop(create2(callvalue(), callvalue(), 30, add(offset, 25)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 26))) pop(create2(callvalue(), callvalue(), 30, add(offset, 27)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 28))) pop(create2(callvalue(), callvalue(), 30, add(offset, 29)))
pop(create2(callvalue(), callvalue(), 30, add(offset, 30))) pop(create2(callvalue(), callvalue(), 30, add(offset, 31)))
offset := add(offset, 32)
}

for {let i := and(value, 0x1F)} i {i := sub(i, 1)} {
pop(create2(0, 0, 30, offset))
pop(create2(callvalue(), callvalue(), 30, offset))
offset := add(offset, 1)
}
}
Expand Down Expand Up @@ -138,7 +138,7 @@ contract ChiToken is IERC20, ERC20WithoutTotalSupply {
let ptr := add(data, 21)
for { } lt(i, end) { i := add(i, 1) } {
mstore(ptr, i)
pop(call(gas(), keccak256(data, 85), 0, 0, 0, 0, 0))
pop(call(gas(), keccak256(data, 85), callvalue(), callvalue(), callvalue(), callvalue(), callvalue()))
}
}
}
Expand Down