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Class TransactionBody

The body of a Plasma transaction. We draw a distinction between the body of a transaction and its signatures to match the transaction encoding expected by the Plasma smart contract. The contract expects transactions to be RLP-encoded as follows:

 [[Blknum1, TxIndex1, Oindex1, DepositNonce1, Input1ConfirmSig,
   Blknum2, TxIndex2, Oindex2, DepositNonce2, Input2ConfirmSig,
   NewOwner, Denom1, NewOwner, Denom2, Fee],
  [Signature1, Signature2]]

The TransactionBody, in this case, is the first element of the above array.

The inputXConfirmSig fields represent the confirm signatures belonging to the transaction referenced by the blockNum, txIdx, and outIdx fields of the referenced input - in other words, the 'previous' transaction in the UTXO DAG. By committing to confirm signatures in this manner, anyone can use them to challenge an invalid exit once an output is spent.

Hierarchy

  • TransactionBody

Index

Constructors

Properties

Methods

Constructors

constructor

  • new TransactionBody(input0: Input, input1: Input, output0: Output, output1: Output, blockNum: number, txIdx: number, input0ConfirmSig: Buffer, input1ConfirmSig: Buffer, fee: BN): TransactionBody

  • Parameters

    • input0: Input
    • input1: Input
    • output0: Output
    • output1: Output
    • blockNum: number
    • txIdx: number
    • input0ConfirmSig: Buffer
    • input1ConfirmSig: Buffer
    • fee: BN

    Returns TransactionBody

Properties

blockNum

blockNum: number

The block number this transaction was included in. For transactions that have not been included in a block yet, this will be zero.

fee

fee: BN

The fee paid to the root node to include this transaction.

input0

input0: Input

The first input to this transaction. For deposits, the input will have a blockNumber, txIdx, and outIdx of zero and a depositNonce set to the nonce of the deposit being spent.

A transaction must always define input0.

input0ConfirmSig

input0ConfirmSig: Buffer

The confirm signature belonging to the transaction whose outputs are referenced by input0.

input1

input1: Input

The second input to this transaction. This may be set to a 'zero' input if there are no coins being spent via this input.

input1ConfirmSig

input1ConfirmSig: Buffer

The confirm signature belonging to the transaction whose outputs are referenced by input1.

output0

output0: Output

output1

output1: Output

txIdx

txIdx: number

The index of this transaction within the block it was included in. For transactions that have not been included in a block yet, this will be zero.

Methods

sigHash

  • sigHash(): Buffer

  • Returns Buffer

toArray

  • toArray(): Buffer[]

  • Returns Buffer[]

toRLP

  • toRLP(): Buffer

  • Returns Buffer

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