ERC20 Gas golf contest

To submit your bytecode, simply make a PR to this repo with the runtime bytecode[1] of your contract in the file src/bin_runtime. See other PRs for examples.

After your PR has been submitted, you can track its progress at https://dapp.ci/erc20-golf/

Your bytecode must match the specifications defined here. In particular, notice the following:

• The transferFrom function must ONLY decrease the allowance of the sender if the allowance is not set to uint(-1) (also known as 2^256 -1, or 115792089237316195423570985008687907853269984665640564039457584007913129639935). In the case allowance == uint(-1), you must leave the allowance as is. This optimization saves 5000-20000 gas on most transferFrom invocations.

• The storage variables defining balances, supply and allowance must be at slots 0, 1, and 2, respectively and either follow the solidity or vyper storage convention. If you use vyper, you must edit the src/storage.md file accordingly.

• For the purposes of this contest, we will not take LOGs into account. You can simply omit logging from your token.

[1] The runtime bytecode of a contract is its code after deployement. Here is how you can extract the runtime bytecode from various source languages:

Solidity:

Using the solidity compiler, run

solc token.sol --bin-runtime > src/bin_runtime

Yul:

In yul one writes init code and runtime code as different object blocks. If you want to focus on the runtime code, simply omit writing a constructor object.

Then compile with the solidity compiler, using:

solc --strict-assembly token.yul

and paste the contents of the binary representation: in the src/bin_runtime file of this repository.

Huff:

Vyper:

Vyper has a different storage convention than Solidity, and our specs assert that the storage layout of the token must follow a Solidity style layout.

If you are writing a Vyper contract, you must also edit src/storage.md and replace all instances of "Solidity" with "Vyper".

Using the vyper compiler, run

vyper -f bytecode_runtime token.vy > src/bin_runtime