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wallet: extract addrMgrWithChangeSource

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This commit is contained in:
Oliver Gugger 2020-08-27 21:14:56 +02:00
parent 314cd98152
commit 4aa36af74c
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GPG key ID: 8E4256593F177720
1 changed files with 32 additions and 23 deletions
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55
wallet/createtx.go
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@ -120,7 +120,7 @@ func (w *Wallet) txToOutputs(outputs []*wire.TxOut, account uint32,
}
defer dbtx.Rollback()
addrmgrNs := dbtx.ReadWriteBucket(waddrmgrNamespaceKey)
addrmgrNs, changeSource := w.addrMgrWithChangeSource(dbtx, account)
// Get current block's height and hash.
bs, err := chainClient.BlockStamp()
@ -134,28 +134,6 @@ func (w *Wallet) txToOutputs(outputs []*wire.TxOut, account uint32,
}
inputSource := makeInputSource(eligible)
changeSource := func() ([]byte, error) {
// Derive the change output script. We'll use the default key
// scope responsible for P2WPKH addresses to do so. As a hack to
// allow spending from the imported account, change addresses
// are created from account 0.
var changeAddr btcutil.Address
var err error
changeKeyScope := waddrmgr.KeyScopeBIP0084
if account == waddrmgr.ImportedAddrAccount {
changeAddr, err = w.newChangeAddress(
addrmgrNs, 0, changeKeyScope,
)
} else {
changeAddr, err = w.newChangeAddress(
addrmgrNs, account, changeKeyScope,
)
}
if err != nil {
return nil, err
}
return txscript.PayToAddrScript(changeAddr)
}
tx, err = txauthor.NewUnsignedTransaction(outputs, feeSatPerKb,
inputSource, changeSource)
if err != nil {
@ -270,6 +248,37 @@ func (w *Wallet) findEligibleOutputs(dbtx walletdb.ReadTx, account uint32, minco
return eligible, nil
}
// addrMgrWithChangeSource returns the address manager bucket and a change
// source function that returns change addresses from said address manager.
func (w *Wallet) addrMgrWithChangeSource(dbtx walletdb.ReadWriteTx,
account uint32) (walletdb.ReadWriteBucket, txauthor.ChangeSource) {
addrmgrNs := dbtx.ReadWriteBucket(waddrmgrNamespaceKey)
changeSource := func() ([]byte, error) {
// Derive the change output script. We'll use the default key
// scope responsible for P2WPKH addresses to do so. As a hack to
// allow spending from the imported account, change addresses
// are created from account 0.
var changeAddr btcutil.Address
var err error
changeKeyScope := waddrmgr.KeyScopeBIP0084
if account == waddrmgr.ImportedAddrAccount {
changeAddr, err = w.newChangeAddress(
addrmgrNs, 0, changeKeyScope,
)
} else {
changeAddr, err = w.newChangeAddress(
addrmgrNs, account, changeKeyScope,
)
}
if err != nil {
return nil, err
}
return txscript.PayToAddrScript(changeAddr)
}
return addrmgrNs, changeSource
}
// validateMsgTx verifies transaction input scripts for tx. All previous output
// scripts from outputs redeemed by the transaction, in the same order they are
// spent, must be passed in the prevScripts slice.