Most of the files were copied from the Optimism module and adjusted for
the Base chain, ie. ids and addresses. There is one change that had to
be added which is a custom network for hardhat etherscan plugin. Base is
not supported by this plugin by default and a custom network
configuration had to be added.

The implementation contract was failing basescan verification unless the
constructor params were empty.

We don't use this script currently so there is no need to push it.

Most of the transactions pass without gasPrice parameter. We need to set
it in case we have problems.

This is address of the wrapped tBTC token on Base mainnet chain.

tBTC token attestation on Ethereum: https://etherscan.io/tx/0x2df8d53251aff96b6341f3fffda03b46ff04c35edb8dff496962da73d19c04c7
Wrapped tBTC token creation on Base: https://basescan.org/tx/0x82af9e68b6be7db6b89cfb6e09368f524e04a317c938e367047f6467484e47a3

The Gnosis Safe wallet was set up on Base by the Threshold Council under
https://app.safe.global/settings/setup?safe=base:0x518385dd31289F1000fE6382b0C65df4d1Cd3bfC