Contract ID

For a transaction of type TransactionType.Create, tx, the contract ID is sha256(0x4655454C ++ ++ root([bytecodeWitnessIndex].data) ++ root_smt(tx.storageSlots)), where root is the Merkle root of the binary Merkle tree with each leaf being 16KiB of instructions, and root_smt is the Sparse Merkle tree root of the provided key-value pairs. If the bytecode is not a multiple of 16 KiB, the final leaf should be zero-padded rounding up to the nearest multiple of 8 bytes.