Proposal re-implement deploy same address feature

[0xcuonghx]

Recaps

How Ethereum calculator smart contract address

1. CREATE opcode

new_address = hash(sender, nonce)

• Problems:
  • Keep deployer nonce many chains same is impossible and contain risks to manage

2. CREATE2 opcode

new_address = hash(0xFF, sender, salt, bytecode)

bytecode = contract_code + contract_contructor_args

• Problems:
  • Cannot upgrade new features or changes

3. CREATE3

new_address = hash(0xFF, sender, salt, KECCAK256_PROXY_CHILD_BYTECODE)

• Problems:
  • Not EIP yet: Add CREATE3 opcode - no init_code hash ethereum/EIPs#3171
  • https://github.com/0xsequence/create3

Proposal

Overview

• ERC721TokenFactory using CREATE3 to decouple from ERC721NativeToken, ERC721BridgeToken
• Easy to add new NFT types by mange mapping
• Remove ERC721TokenProxy

"ERC721NativeToken" -> ERC721NativeToken.bytecode
"ERC721BridgeToken" -> ERC721BridgeToken.bytecode
"OTHER"-> OTHER.bytecode

Specifications

interface IGUFactory {
  deploy(byte32 _salt, byte32 bytecode)
  setType(byte32 type, byte32 bytecode)
}