63 lines
2.2 KiB
Go
63 lines
2.2 KiB
Go
// Copyright (c) 2018 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package psbt
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import (
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"github.com/lbryio/lbcd/wire"
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)
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// MinTxVersion is the lowest transaction version that we'll permit.
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const MinTxVersion = 1
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// New on provision of an input and output 'skeleton' for the transaction, a
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// new partially populated PBST packet. The populated packet will include the
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// unsigned transaction, and the set of known inputs and outputs contained
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// within the unsigned transaction. The values of nLockTime, nSequence (per
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// input) and transaction version (must be 1 of 2) must be specified here. Note
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// that the default nSequence value is wire.MaxTxInSequenceNum. Referencing
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// the PSBT BIP, this function serves the roles of teh Creator.
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func New(inputs []*wire.OutPoint,
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outputs []*wire.TxOut, version int32, nLockTime uint32,
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nSequences []uint32) (*Packet, error) {
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// Create the new struct; the input and output lists will be empty, the
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// unsignedTx object must be constructed and serialized, and that
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// serialization should be entered as the only entry for the
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// globalKVPairs list.
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//
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// Ensure that the version of the transaction is greater then our
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// minimum allowed transaction version. There must be one sequence
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// number per input.
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if version < MinTxVersion || len(nSequences) != len(inputs) {
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return nil, ErrInvalidPsbtFormat
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}
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unsignedTx := wire.NewMsgTx(version)
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unsignedTx.LockTime = nLockTime
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for i, in := range inputs {
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unsignedTx.AddTxIn(&wire.TxIn{
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PreviousOutPoint: *in,
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Sequence: nSequences[i],
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})
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}
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for _, out := range outputs {
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unsignedTx.AddTxOut(out)
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}
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// The input and output lists are empty, but there is a list of those
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// two lists, and each one must be of length matching the unsigned
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// transaction; the unknown list can be nil.
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pInputs := make([]PInput, len(unsignedTx.TxIn))
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pOutputs := make([]POutput, len(unsignedTx.TxOut))
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// This new Psbt is "raw" and contains no key-value fields, so sanity
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// checking with c.Cpsbt.SanityCheck() is not required.
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return &Packet{
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UnsignedTx: unsignedTx,
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Inputs: pInputs,
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Outputs: pOutputs,
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Unknowns: nil,
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}, nil
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}
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