Advent of Code 2021 in Solidity (and JS).
You only need node to be installed on your machine. To get the rest of the
dependencies, run npm install after checking out this repository.
To run any of the Solidity contracts in the contracts folder:
npx hardhat exec _01
It prints a gas estimate and the result from the main function in the contract.
To run the JS solutions:
node js/_01.js
If no inputs are passed in stdin, then the programs execute with the example given in the puzzle. To pass input, pipe into stdin:
cat inputs/_01 | npx hardhat exec _01
cat inputs/_01 | node js/_01.js
Gas estimates are omitted when input is passed via stdin. For some of the later
puzzles, even the gas estimate on the small example is not helpful and increases
the runtime by 2x, so they can be turned off by the --skip-gas-estimate flag.
For example,
npx hardhat exec --skip-gas-estimate _21
Even so, we sometimes hit memory limits with hardhat. As a
workaround, set the following environment variable and run npx hardhat exec again.
This allows hardhat to use more memory than the default.
export NODE_OPTIONS="--max-old-space-size=4096"
Unfortunately, even that is not enough to run the Solidity solutions for problems 12, 15 and 18 on the full input (they work on the smaller examples).