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OP code Description
COINBASE Returns 0 (this opcode returns the address that gets the current block reward; since the reward is split among multiple participating parties in Zilliqa, it's not possible to implement this opcode, and we return 0)
CHAINID Returns 0x8000 + Zilliqa ChainID. Existing Zilliqa chain ids are incompatible with Ethereum ids (where 1 means mainnet), so we shift our chain id space up by 0x8000.
BASEFEE Returns the current ZIL gas price of 0.02 ZIL
DIFFICULTY Return current difficulty