Lido offchain keys experiment

To run deposit price tests, clone repository and run brownie tests with ganache.

git clone https://github.com/almsh/offchain-keys-playground.git
brownie compile
WEB3_INFURA_PROJECT_ID=%infura_project_id% PYTHONUNBUFFERED=1 brownie test -s

This outputs csv formatted gas usage data for keys usage for different storage methods (Naive, Batch, Merkle, Merkle+Batch), separatly for adding and deposit.