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Usage: new Transaction(arg)
Description: Instantiate a new instance of Transaction that represents a transaction, a set of inputs and outputs to change ownership of tokens

parameters type required Description
arg String/Buffer/Object/Transaction yes

Returns: {Transaction} A new instance of a Transaction

Transaction.shallowCopy(transaction)

Description: Create a 'shallow' copy of the transaction, by serializing and deserializing it dropping any additional information that inputs and outputs may have hold.

Parameters:

parameter type required Description
transaction Transaction yes

Returns : {Transaction} An new copy instance of the provided transaction

Transaction.fromString(str)

Description: Instantiate a Transaction from a string

Parameters:

parameter type required Description
str Object yes A string of the message

Returns : {Transaction} An instance of Transaction

Transaction.fromJSON(obj)

Description: Instantiate a Transaction from an object

Parameters:

parameter type required Description
obj Object yes An JSON string or Object with keys: message

Returns : {Transaction} An instance of Transaction

.serialize(unsafe)

Description: Retrieve a hex string that can be used with dashd's CLI interface (decoderawtransaction, sendrawtransaction) Flags that can be used to skip tests:

  • disableAll: disable all checks
  • disableSmallFees: disable checking for fees that are too small
  • disableLargeFees: disable checking for fees that are too large
  • disableIsFullySigned: disable checking if all inputs are fully signed
  • disableDustOutputs: disable checking if there are no outputs that are dust amounts
  • disableMoreOutputThanInput: disable checking if the transaction spends more bitcoins than the sum of the input amounts

Parameters:

parameter type required Description
unsafe Boolean/Object yes unsafe if true, skip all tests. if it's an object, it's expected to contain a set of flags to skip certain tests.

Returns: {string}

.checkSerialize(opts)

Description: Retrieve a hex string that can be used with dashd's CLI interface (decoderawtransaction, sendrawtransaction)

Parameters:

parameter type required Description
opts Boolean/Object yes opts allows to skip certain tests. {see Transaction#serialize}.

Returns: {string}

.getSerializationError(opts)

Description: Retrieve a possible error that could appear when trying to serialize and broadcast this transaction.

Parameters:

parameter type required Description
opts Boolean/Object yes opts allows to skip certain tests. {see Transaction#serialize}.

.lockUntilDate(time)

Description: Sets nLockTime so that transaction is not valid until the desired date (a timestamp in seconds since UNIX epoch is also accepted)

Parameters:

parameter type required Description
time Date / Number yes date instance or timestamp in seconds since UNIX epoch

Returns: {Transaction}

.lockUntilBlockHeight(height)

Description: Sets nLockTime so that transaction is not valid until the valid height

Parameters:

parameter type required Description
height Date / Number yes block height

Returns: {Transaction}

.getLockTime()

Description: Returns a semantic version of the transaction's nLockTime.
If nLockTime is 0, it returns null, if it is < 500000000, it returns a block height (number) else it returns a Date object.

Parameters:

parameter type required Description
height Date / Number yes block height

Returns: {number / Date}

.from(utxo, pubkeys, threshold)

Description: Add an input to this transaction.
This is a high level interface to add an input, for more control, use Transaction#addInput.

Can receive, as output information, the output of dashd's listunspent command, and a slightly fancier format recognized by dashcore:

{
  "address": "yYo3PeSBv2rMnJeyLUCCzx4Y8VhPppZKkC",
  "txId": "a477af6b2667c29670467e4e0728b685ee07b240235771862318e29ddbe58458",
  "outputIndex": 0,
  "script": null,
  "satoshis": 1020000
}

Where address can be either a string or a dashcore Address object. The same is true for script, which can be a string or a dashcore Script.

Parameters:

parameter type required Description
utxo Array/Object yes Array of utxos or single utxo object or representation
pubkeys Array no In case of a multisigUtxo.
threshold Number no

Returns: Transaction

.addInput(input, outputScript, satoshis)

Description: Add an input to this transaction. The input must be an instance of the Input class.
It should have information about the Output that it's spending, but if it's not already set, two additional parameters, outputScript and satoshis can be provided.
Using .uncheckedAddInput(input) one can add an input without having the input information checked.

Parameters:

parameter type required Description
input Input yes Array of utxos or single utxo object or representation
outputScript String/Script no
satoshis Number no

Returns: Transaction

.hasAllUtxoInfo()

Description: Returns true if the transaction has enough info on all inputs to be correctly validated.

Parameters: None.

Returns: {Boolean}

.fee(amount)

Description: Manually set the fee for this transaction. Beware that this resets all the signatures for inputs (in further versions, SIGHASH_SINGLE or SIGHASH_NONE signatures will not be reset).

Parameters:

parameter type required Description
amount Number yes amount in satoshis to be sent

Returns: Transaction

.feePerKb(amount)

Description: Manually set the fee per KB for this transaction. Beware that this resets all the signatures for inputs (in further versions, SIGHASH_SINGLE or SIGHASH_NONE signatures will not be reset).

Parameters:

parameter type required Description
amount Number yes amount satoshis per KB to be sent

Returns: Transaction

.change(address)

Description: Set the change address for this transaction. Beware that this resets all the signatures for inputs (in further versions, SIGHASH_SINGLE or SIGHASH_NONE signatures will not be reset).

Parameters:

parameter type required Description
address Address/String yes An address for change to be sent to.

Returns: Transaction

.getChangeOutput()

Description: Get the change output if it exists

Parameters: None.

Returns: Output

.to(address, amount)

Description: Add an output to the transaction. Beware that this resets all the signatures for inputs (in further versions, SIGHASH_SINGLE or SIGHASH_NONE signatures will not be reset).

Parameters:

parameter type required Description
address Address/String yes An address to send dash to.
amount Number yes in satoshis

Returns: Transaction

.addData(value)

Description: Add an OP_RETURN output to the transaction. Beware that this resets all the signatures for inputs (in further versions, SIGHASH_SINGLE or SIGHASH_NONE signatures will not be reset).

Parameters:

parameter type required Description
value Buffer / string yes value the data to be stored in the OP_RETURN output. In case of a string, the UTF-8 representation will be stored

Returns: Transaction

.addOutput(output)

Description: Add an output to the transaction.

Parameters:

parameter type required Description
output Output yes the output to add.

Returns: Transaction

.clearOutputs()

Description: Remove all outputs from the transaction.

Parameters: None.

Returns: Output

.getFee()

Description: Calculates the fee of the transaction. If there's a fixed fee set, return that.
If there is no change output set, the fee is the total value of the outputs minus inputs.
If there's no fee set and no change address, estimate the fee based on size.

Parameters: None.

Returns: {Number} fee of this transaction in satoshis

.sort()

Description: Sort a transaction's inputs and outputs according to BIP69

Parameters: None.

Returns: Transaction

.shuffleOutputs()

Description: Randomize this transaction's outputs ordering. The shuffling algorithm is a version of the Fisher-Yates shuffle, provided by lodash's _.shuffle().

Parameters: None.

Returns: Transaction

.sortOutputs()

Description: Sort this transaction's outputs, according to a given sorting function that takes an array as argument and returns a new array, with the same elements but with a different order. The argument function MUST NOT modify the order of the original array

Parameters:

parameter type required Description
sortingFunction Function yes sorting function

Returns: Transaction

.sortInputs()

Description: Sort this transaction's inputs, according to a given sorting function that takes an array as argument and returns a new array, with the same elements but with a different order.

Parameters:

parameter type required Description
sortingFunction Function yes sorting function

Returns: Transaction

.removeInput(txid, outputIndex)

Description: Remove a specific input by it's txid and outputindex Parameters:

parameter type required Description
txid string yes
outputIndex number yes

Returns: void

.sign(privateKey, sigType)

Description: Sign the transaction using one or more private keys. It tries to sign each input, verifying that the signature will be valid (matches a public key). Parameters:

parameter type required Description
privateKey Array/String/PrivateKey yes
sigType number no

Returns: Transaction

.applySignature()

Description: Add a signature to the transaction

Parameters:

parameter type required Description
signature Object yes An object having inputIndex, sigtype, publicKey and signature

Returns: Transaction

.isFullySigned()

Description: Check whether the transaction is fully signed

Parameters: None.

Returns: boolean

.isValidSignature(signature)

Description: Check whether the transaction is fully signed

Parameters:

parameter type required Description
signature Signature yes

Returns: boolean

.verifySignature()

Description: whether the signature is valid for this transaction input

Parameters: None.

Returns: boolean

.verify()

Description: Check that a transaction passes basic sanity tests. If not, return a string describing the error. This function contains the same logic as CheckTransaction in bitcoin core.

Parameters: None.

Returns: boolean or reason for failure as a string

.isCoinbase()

Description: Analogous to dashd's IsCoinBase function in transaction.h

Parameters: None.

Returns: boolean

.hasExtraPayload()

Description: Checks if transaction has DIP2 extra payload

Parameters: None.

Returns: boolean

.setType(type)

Description: Set special transaction type and create an empty extraPayload

Parameters:

parameter type required Description
type number yes

Returns: boolean

.setExtraPayload(payload)

Description: Set special transaction extra payload

Parameters:

parameter type required Description
payload AbstractPayload yes

Returns: boolean

.getExtraPayloadSize()

Description: Return extra payload size in bytes.

Parameters: None.

Returns: Number

.getSignatures()

Description: Parameters: None. Returns: Array

.toObject() / .toJSON()

Description: Will return an object representation of the transaction

Parameters: None.

Returns: {Object} A plain object with the transaction properties

.addFundingOutput(fundingAmount)

Description:

Parameters:

parameter type required Description
fundingAmount Number yes

Returns: Transaction

.addBurnOutput(satoshisToBurn, publicKeyHash)

Description:

Parameters:

parameter type required Description
satoshisToBurn Number yes
publicKeyHash Buffer yes

Returns: Transaction

.getOutPointBuffer(outputIndex)

Description: Gives an OutPoint buffer for the output at a given index

Parameters:

parameter type required Description
outputIndex Number yes

Returns: Buffer