build
fun buildPreImageHash(tx: Transaction, from: String, nonce: BigInteger, fee: Fee): Result<ByteArray>
Build a preImageHash for a transaction.
The preImageHash is an opaque byte array containing the serialized WalletCore PreSigningOutput protobuf. It includes:
data_hash: 32-byte hash to be signed
data: RLP-encoded unsigned transaction (NOT used for compilation)
Note: For internal signing use buildPreImageHashWithSigningInput which also returns the original SigningInput bytes needed for compileWithSignatures.
Return
Result containing the serialized PreSigningOutput bytes, or an error
Parameters
tx
The transaction to build
from
The sender's address
nonce
The sender's nonce (transaction count)
fee
The fee to use for the transaction