Return information about contract

[alex-pakalniskis]

User request

Add a Graph CLI command to return information about a smart contract in human-readable format. Include data such as:

• start block
• ABI, if available
• source code, if available
• all chains where this contract is deployed

By default, return data in terminal but enable users to save data to file.

Example commands

graph contract <0x...> <network> # returns start block, ABI, & source code
graph contract <0x...> <network> --save-abi abiFile.json # save ABI to file
graph contract <0x...> <network> --save-code Contract.sol # save source code to file
graph contract <0x...> <network> --save-chains chains.json # save list of chains where contract is deployed
graph contract <0x...> <network> --save # save ABI, source code, and chains list to file

[matthewdarwin]

Duplicate of #1827