91 lines
2.6 KiB
Go
91 lines
2.6 KiB
Go
// Copyright (c) 2016 The Decred developers
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// Copyright (c) 2017 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 wallet
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import (
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"github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcwallet/walletdb"
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)
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// OutputSelectionPolicy describes the rules for selecting an output from the
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// wallet.
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type OutputSelectionPolicy struct {
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Account uint32
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RequiredConfirmations int32
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}
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func (p *OutputSelectionPolicy) meetsRequiredConfs(txHeight, curHeight int32) bool {
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return confirmed(p.RequiredConfirmations, txHeight, curHeight)
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}
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// UnspentOutputs fetches all unspent outputs from the wallet that match rules
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// described in the passed policy.
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func (w *Wallet) UnspentOutputs(policy OutputSelectionPolicy) ([]*TransactionOutput, error) {
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var outputResults []*TransactionOutput
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err := walletdb.View(w.db, func(tx walletdb.ReadTx) error {
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addrmgrNs := tx.ReadBucket(waddrmgrNamespaceKey)
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txmgrNs := tx.ReadBucket(wtxmgrNamespaceKey)
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syncBlock := w.Manager.SyncedTo()
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// TODO: actually stream outputs from the db instead of fetching
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// all of them at once.
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outputs, err := w.TxStore.UnspentOutputs(txmgrNs)
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if err != nil {
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return err
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}
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for _, output := range outputs {
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// Ignore outputs that haven't reached the required
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// number of confirmations.
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if !policy.meetsRequiredConfs(output.Height, syncBlock.Height) {
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continue
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}
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// Ignore outputs that are not controlled by the account.
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_, addrs, _, err := txscript.ExtractPkScriptAddrs(output.PkScript,
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w.chainParams)
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if err != nil || len(addrs) == 0 {
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// Cannot determine which account this belongs
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// to without a valid address. TODO: Fix this
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// by saving outputs per account, or accounts
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// per output.
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continue
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}
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_, outputAcct, err := w.Manager.AddrAccount(addrmgrNs, addrs[0])
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if err != nil {
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return err
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}
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if outputAcct != policy.Account {
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continue
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}
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// Stakebase isn't exposed by wtxmgr so those will be
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// OutputKindNormal for now.
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outputSource := OutputKindNormal
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if output.FromCoinBase {
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outputSource = OutputKindCoinbase
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}
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result := &TransactionOutput{
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OutPoint: output.OutPoint,
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Output: wire.TxOut{
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Value: int64(output.Amount),
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PkScript: output.PkScript,
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},
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OutputKind: outputSource,
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ContainingBlock: BlockIdentity(output.Block),
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ReceiveTime: output.Received,
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}
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outputResults = append(outputResults, result)
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}
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return nil
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})
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return outputResults, err
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}
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