Display methods from implementation contract ABI in proxy contract interaction modal

[douglasqian]

Overview

Today there is a "contract interaction" flow for multisig signers but ABIs are only loaded directly from the contract itself. This makes it hard to interact with proxy contracts, and in reality most production smart contract deployments are performed with proxies to allow for upgrades. This feature request is about making it easier to interact with proxy + implementation contract by displaying methods from the implementation contract when a proxy contract address is loaded.

Goals

• Detect when a provided contract address is a proxy address (see how Blockscout does this)
• Load methods from ABI of implementation contract in proxy

Requirements

• We can start by just supporting Blockscout for now and look to support other block explorers like Celoscan later

Screens

https://explorer.celo.org/address/0x6180F059986cF55Bb2b46A14B21A7b8F9aF999a7/read-proxy