An Ethereum compatible backend for Godwoken rollup framework. It include generator and validator implementations.
Polyjuice provides an Ethereum compatible layer on Nervos CKB. It leverages account model as well as scalability provided by Godwoken, then integrates evmone as an EVM engine for running Ethereum smart contracts.
Polyjuice aims at 100% EVM compatibility as a goal, meaning we plan to support all smart contracts supported by the latest Ethereum hardfork version. See EVM-compatible.md and Addition-Features.md for more details.
- All Ethereum Virtual Machine Opcodes
- Value transfer
- pre-compiled contracts
- ecrecover
- sha256hash
- ripemd160hash
- dataCopy
- bigModExp
- bn256AddIstanbul
- bn256ScalarMulIstanbul
- bn256PairingIstanbul (performance issue)
- blake2F
header : [u8; 8] (header[0] = 0xff,
header[1] = 0xff,
header[2] = 0xff,
header[3..7] = "POLY"
header[7] = call_kind { 0: CALL, 3: CREATE })
gas_limit : u64 (little endian)
gas_price : u128 (little endian)
value : u128 (little endian)
input_size : u32 (little endian)
input_data : [u8; input_size] (input data)
Every polyjuice argument fields must been serialized one by one and put into godwoken RawL2Transaction.args for polyjuice to read. If the input_data have 56 bytes, then the serialized data size is 8 + 8 + 16 + 16 + 4 + 56 = 108 bytes.
code_hash: polyjuice_validator_type_script_hash
hash_type: type
args:
rollup_type_hash : [u8; 32]
sudt_id : u32 (little endian, the token id)
Polyjuice creator account is a godwoken account for creating polyjuice contract account. This account can only been created by meta contract, and the account id is used as the chain id in polyjuice. The sudt_id field in script args is the sudt token current polyjuice instance bind to.
code_hash: polyjuice_validator_type_script_hash
hash_type: type
args:
rollup_type_hash : [u8; 32]
creator_account_id : u32 (little endian, also chain id, and for reading 'sudt_id' from creator account script)
info_data_hash : [u8; 20] (The information to be hashed is depend on how the account been created: [normal, create2],
the 20 bytes value is keccak256(info_data)[12..])
info_content:
sender_address : [u8; 20] (the msg.sender: blake128(sender_script) + account id)
sender_nonce : u32
info_data: rlp_encode(sender_address, sender_nonce)
The polyjuice contract account created in polyjuice by CREATE call kind or op code.
info_data:
special_byte : u8 (value is '0xff', refer to ethereum)
sender_address : [u8; 20] (the msg.sender: blake128(sender_script) + account id)
create2_salt : [u8; 32] (create2 salt)
init_code_hash : [u8; 32] (keccak256(init_code))
The polyjuice contract account created in polyjuice by CREATE2 op code.
The address used in polyjuice are all godwoken short address, which is:
short_address = blake2b(script.as_slice())[0..20]
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