propose_transaction

Creates a Partially Constructed Zcash Transaction (PCZT) from transparent inputs and payment outputs. Implements the Creator, Constructor, and IO Finalizer roles from ZIP 374.

Signature

TypeScript
Go
Kotlin

function propose_transaction(
  inputs: WasmTransparentInput[],
  payments: WasmPayment[],
  change_address: string | null,
  network: 'mainnet' | 'testnet',
  expiry_height: number
): WasmPczt

func ProposeTransaction(
  inputs []TransparentInput,
  payments []Payment,
  changeAddress *string,
  network string,
  expiryHeight uint32,
) (*Pczt, error)

fun proposeTransaction(
  inputs: List<TransparentInput>,
  payments: List<Payment>,
  changeAddress: String?,
  network: String,
  expiryHeight: UInt
): Pczt

Parameters

inputs

TransparentInput[]

required

Array of transparent UTXOs to spend

payments

Payment[]

required

Array of payment outputs to create

change_address

string | null

Address to receive change (Orchard or transparent)

network

string

required

'mainnet' or 'testnet'

expiry_height

number

required

Block height at which the transaction expires

Returns

A Pczt object representing the partially constructed transaction.

Example

const input = new t2z.WasmTransparentInput(
  '03abc123...',
  'ce15f716...1338',
  0,
  1_000_000n,
  '76a914...88ac',
  null
);

const payment = new t2z.WasmPayment(
  'u1recipient...',
  800_000n,
  null,
  null
);

const pczt = t2z.propose_transaction(
  [input],
  [payment],
  'u1change...',
  'testnet',
  3720100
);

Errors

Error	Cause
`InvalidAddress`	Address couldn’t be parsed
`InsufficientFunds`	Inputs don’t cover payments + fee
`ChangeRequired`	Change exists but no change address provided
`OrchardBuilderNotAvailable`	Expiry height is before Nu5

Overview

Transaction Construction

Signing

Proving & Finalization

Utilities

propose_transaction

Signature

Parameters

Returns

Example

Errors

See Also

​Signature

​Parameters

​Returns

​Example

​Errors

​See Also

Signature

Parameters

Returns

Example

Errors

See Also