From 318d81bc90f68adc6a615ffab003680a59c07acc Mon Sep 17 00:00:00 2001
From: Dave Collins <davec@conformal.com>
Date: Fri, 25 Aug 2023 15:24:16 -0500
Subject: [PATCH] multi: Wrap errors for better errors.Is/As support.

This updates all remaining cases of unwrapped errors in fmt.Errorf calls
to wrap the underlying errors with the %w format verb to ensure they
work nicely with errors.Is and errors.As.
---
 addrmgr/addrmanager.go                    | 14 ++++++-------
 certgen/certgen.go                        | 12 +++++------
 certgen/certgen_ed25519.go                | 12 +++++------
 cmd/gencerts/gencerts.go                  | 12 +++++------
 dcrutil/util.go                           |  4 ++--
 internal/blockchain/utxobackend_test.go   |  8 ++++----
 internal/fees/estimator.go                | 25 +++++++++++------------
 internal/staging/banmanager/banmanager.go |  4 ++--
 rpcclient/infrastructure.go               |  2 +-
 service_windows.go                        | 13 ++++++------
 txscript/sign/sign.go                     |  8 ++++----
 txscript/sign/sign_test.go                | 12 +++++------
 wire/error.go                             |  6 +++---
 13 files changed, 64 insertions(+), 68 deletions(-)

diff --git a/addrmgr/addrmanager.go b/addrmgr/addrmanager.go
index f0dcb44bdd..5b189c3792 100644
--- a/addrmgr/addrmanager.go
+++ b/addrmgr/addrmanager.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2014 The btcsuite developers
-// Copyright (c) 2015-2021 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -531,7 +531,7 @@ func (a *AddrManager) deserializePeers(filePath string) error {
 	}
 	r, err := os.Open(filePath)
 	if err != nil {
-		return fmt.Errorf("%s error opening file: %v", filePath, err)
+		return fmt.Errorf("%s error opening file: %w", filePath, err)
 	}
 	defer r.Close()
 
@@ -539,7 +539,7 @@ func (a *AddrManager) deserializePeers(filePath string) error {
 	dec := json.NewDecoder(r)
 	err = dec.Decode(&sam)
 	if err != nil {
-		return fmt.Errorf("error reading %s: %v", filePath, err)
+		return fmt.Errorf("error reading %s: %w", filePath, err)
 	}
 
 	if sam.Version != serialisationVersion {
@@ -551,13 +551,13 @@ func (a *AddrManager) deserializePeers(filePath string) error {
 	for _, v := range sam.Addresses {
 		netAddr, err := a.newAddressFromString(v.Addr)
 		if err != nil {
-			return fmt.Errorf("failed to deserialize netaddress "+
-				"%s: %v", v.Addr, err)
+			return fmt.Errorf("failed to deserialize netaddress %s: %w", v.Addr,
+				err)
 		}
 		srcAddr, err := a.newAddressFromString(v.Src)
 		if err != nil {
-			return fmt.Errorf("failed to deserialize netaddress "+
-				"%s: %v", v.Src, err)
+			return fmt.Errorf("failed to deserialize netaddress %s: %w", v.Src,
+				err)
 		}
 
 		ka := &KnownAddress{
diff --git a/certgen/certgen.go b/certgen/certgen.go
index 635eb0cd23..0b433b1e4d 100644
--- a/certgen/certgen.go
+++ b/certgen/certgen.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2015 The btcsuite developers
-// Copyright (c) 2015-2017 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -45,7 +45,7 @@ func NewTLSCertPair(curve elliptic.Curve, organization string, validUntil time.T
 	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
 	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to generate serial number: %s", err)
+		return nil, nil, fmt.Errorf("failed to generate serial number: %w", err)
 	}
 
 	host, err := os.Hostname()
@@ -120,24 +120,24 @@ func NewTLSCertPair(curve elliptic.Curve, organization string, validUntil time.T
 	derBytes, err := x509.CreateCertificate(rand.Reader, &template,
 		&template, &priv.PublicKey, priv)
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to create certificate: %v", err)
+		return nil, nil, fmt.Errorf("failed to create certificate: %w", err)
 	}
 
 	certBuf := &bytes.Buffer{}
 	err = pem.Encode(certBuf, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to encode certificate: %v", err)
+		return nil, nil, fmt.Errorf("failed to encode certificate: %w", err)
 	}
 
 	keybytes, err := x509.MarshalECPrivateKey(priv)
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to marshal private key: %v", err)
+		return nil, nil, fmt.Errorf("failed to marshal private key: %w", err)
 	}
 
 	keyBuf := &bytes.Buffer{}
 	err = pem.Encode(keyBuf, &pem.Block{Type: "EC PRIVATE KEY", Bytes: keybytes})
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to encode private key: %v", err)
+		return nil, nil, fmt.Errorf("failed to encode private key: %w", err)
 	}
 
 	return certBuf.Bytes(), keyBuf.Bytes(), nil
diff --git a/certgen/certgen_ed25519.go b/certgen/certgen_ed25519.go
index 841ae2b390..9ae3974983 100644
--- a/certgen/certgen_ed25519.go
+++ b/certgen/certgen_ed25519.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2015 The btcsuite developers
-// Copyright (c) 2015-2019 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -48,7 +48,7 @@ func NewEd25519TLSCertPair(organization string, validUntil time.Time, extraHosts
 	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
 	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to generate serial number: %s", err)
+		return nil, nil, fmt.Errorf("failed to generate serial number: %w", err)
 	}
 
 	host, err := os.Hostname()
@@ -123,24 +123,24 @@ func NewEd25519TLSCertPair(organization string, validUntil time.Time, extraHosts
 	derBytes, err := x509.CreateCertificate(rand.Reader, &template,
 		&template, priv.Public(), priv)
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to create certificate: %v", err)
+		return nil, nil, fmt.Errorf("failed to create certificate: %w", err)
 	}
 
 	certBuf := &bytes.Buffer{}
 	err = pem.Encode(certBuf, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to encode certificate: %v", err)
+		return nil, nil, fmt.Errorf("failed to encode certificate: %w", err)
 	}
 
 	keybytes, err := x509.MarshalPKCS8PrivateKey(priv)
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to marshal private key: %v", err)
+		return nil, nil, fmt.Errorf("failed to marshal private key: %w", err)
 	}
 
 	keyBuf := &bytes.Buffer{}
 	err = pem.Encode(keyBuf, &pem.Block{Type: "PRIVATE KEY", Bytes: keybytes})
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to encode private key: %v", err)
+		return nil, nil, fmt.Errorf("failed to encode private key: %w", err)
 	}
 
 	return certBuf.Bytes(), keyBuf.Bytes(), nil
diff --git a/cmd/gencerts/gencerts.go b/cmd/gencerts/gencerts.go
index 04bd8684b9..2a673026ed 100644
--- a/cmd/gencerts/gencerts.go
+++ b/cmd/gencerts/gencerts.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2020-2021 The Decred developers
+// Copyright (c) 2020-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -206,7 +206,7 @@ func randomX509SerialNumber() (*big.Int, error) {
 	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
 	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
 	if err != nil {
-		return nil, fmt.Errorf("failed to generate serial number: %s", err)
+		return nil, fmt.Errorf("failed to generate serial number: %w", err)
 	}
 	return serialNumber, nil
 }
@@ -277,7 +277,7 @@ func generateAuthority(pub, priv interface{}, hosts []string, org string, years
 	buf := new(bytes.Buffer)
 	err = pem.Encode(buf, &pem.Block{Type: "CERTIFICATE", Bytes: cert})
 	if err != nil {
-		return nil, fmt.Errorf("failed to encode certificate: %v", err)
+		return nil, fmt.Errorf("failed to encode certificate: %w", err)
 	}
 	pemBlock := buf.Bytes()
 
@@ -317,7 +317,7 @@ func createIssuedCert(pub, caPriv interface{}, ca *x509.Certificate,
 	buf := new(bytes.Buffer)
 	err = pem.Encode(buf, &pem.Block{Type: "CERTIFICATE", Bytes: cert})
 	if err != nil {
-		return nil, fmt.Errorf("failed to encode certificate: %v", err)
+		return nil, fmt.Errorf("failed to encode certificate: %w", err)
 	}
 	pemBlock := buf.Bytes()
 
@@ -336,12 +336,12 @@ func createIssuedCert(pub, caPriv interface{}, ca *x509.Certificate,
 func marshalPrivateKey(key interface{}) ([]byte, error) {
 	der, err := x509.MarshalPKCS8PrivateKey(key)
 	if err != nil {
-		return nil, fmt.Errorf("failed to marshal private key: %v", err)
+		return nil, fmt.Errorf("failed to marshal private key: %w", err)
 	}
 	buf := new(bytes.Buffer)
 	err = pem.Encode(buf, &pem.Block{Type: "PRIVATE KEY", Bytes: der})
 	if err != nil {
-		return nil, fmt.Errorf("failed to encode private key: %v", err)
+		return nil, fmt.Errorf("failed to encode private key: %w", err)
 	}
 	return buf.Bytes(), nil
 }
diff --git a/dcrutil/util.go b/dcrutil/util.go
index f1a9733392..06f18156aa 100644
--- a/dcrutil/util.go
+++ b/dcrutil/util.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013, 2014 The btcsuite developers
-// Copyright (c) 2015-2021 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -62,7 +62,7 @@ func VerifyMessage(address string, signature string, message string, params Addr
 	// Decode base64 signature.
 	sig, err := base64.StdEncoding.DecodeString(signature)
 	if err != nil {
-		return fmt.Errorf("malformed base64 encoding: %v", err)
+		return fmt.Errorf("malformed base64 encoding: %w", err)
 	}
 
 	// Validate the signature - this just shows that it was valid for any pubkey
diff --git a/internal/blockchain/utxobackend_test.go b/internal/blockchain/utxobackend_test.go
index acd3eaa8f6..2510b14615 100644
--- a/internal/blockchain/utxobackend_test.go
+++ b/internal/blockchain/utxobackend_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2021-2022 The Decred developers
+// Copyright (c) 2021-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -73,14 +73,14 @@ func TestConvertLdbErr(t *testing.T) {
 		gotErr := convertLdbErr(test.ldbErr, test.desc)
 
 		// Validate the error kind.
-		if gotErr.Err != test.want {
+		if !errors.Is(gotErr.Err, test.want) {
 			t.Errorf("%q: mismatched error kind:\nwant: %v\n got: %v\n",
 				test.name, test.want, gotErr.Err)
 			continue
 		}
 
-		wantDesc := fmt.Sprintf("%s: %v", test.desc, test.ldbErr)
 		// Validate the error description.
+		wantDesc := fmt.Sprintf("%s: %v", test.desc, test.ldbErr)
 		if gotErr.Description != wantDesc {
 			t.Errorf("%q: mismatched error description:\nwant: %v\n got: %v\n",
 				test.name, wantDesc, gotErr.Description)
@@ -88,7 +88,7 @@ func TestConvertLdbErr(t *testing.T) {
 		}
 
 		// Validate the raw error.
-		if gotErr.RawErr != test.ldbErr {
+		if !errors.Is(gotErr.RawErr, test.ldbErr) {
 			t.Errorf("%q: mismatched raw error:\nwant: %v\n got: %v\n",
 				test.name, test.ldbErr, gotErr.RawErr)
 			continue
diff --git a/internal/fees/estimator.go b/internal/fees/estimator.go
index f6e0b46367..d22c18a9da 100644
--- a/internal/fees/estimator.go
+++ b/internal/fees/estimator.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2018-2022 The Decred developers
+// Copyright (c) 2018-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -228,13 +228,13 @@ func NewEstimator(cfg *EstimatorConfig) (*Estimator, error) {
 	if cfg.DatabaseFile != "" {
 		db, err := leveldb.OpenFile(cfg.DatabaseFile, nil)
 		if err != nil {
-			return nil, fmt.Errorf("error opening estimator database: %v", err)
+			return nil, fmt.Errorf("error opening estimator database: %w", err)
 		}
 		res.db = db
 
 		err = res.loadFromDatabase(cfg.ReplaceBucketsOnLoad)
 		if err != nil {
-			return nil, fmt.Errorf("error loading estimator data from db: %v",
+			return nil, fmt.Errorf("error loading estimator data from db: %w",
 				err)
 		}
 	}
@@ -307,7 +307,7 @@ func (stats *Estimator) loadFromDatabase(replaceBuckets bool) error {
 
 	version, err := stats.db.Get(dbKeyVersion, nil)
 	if err != nil && !errors.Is(err, leveldb.ErrNotFound) {
-		return fmt.Errorf("error reading version from db: %v", err)
+		return fmt.Errorf("error reading version from db: %w", err)
 	}
 	if len(version) < 1 {
 		// No data in the file. Fill with the current config.
@@ -326,19 +326,19 @@ func (stats *Estimator) loadFromDatabase(replaceBuckets bool) error {
 
 		err := binary.Write(b, dbByteOrder, stats.bucketFeeBounds)
 		if err != nil {
-			return fmt.Errorf("error writing bucket fees to db: %v", err)
+			return fmt.Errorf("error writing bucket fees to db: %w", err)
 		}
 		batch.Put(dbKeyBucketFees, b.Bytes())
 
 		err = stats.db.Write(batch, nil)
 		if err != nil {
-			return fmt.Errorf("error writing initial estimator db file: %v",
+			return fmt.Errorf("error writing initial estimator db file: %w",
 				err)
 		}
 
 		err = stats.updateDatabase()
 		if err != nil {
-			return fmt.Errorf("error adding initial estimator data to db: %v",
+			return fmt.Errorf("error adding initial estimator data to db: %w",
 				err)
 		}
 
@@ -354,7 +354,7 @@ func (stats *Estimator) loadFromDatabase(replaceBuckets bool) error {
 	maxConfirmsBytes, err := stats.db.Get(dbKeyMaxConfirms, nil)
 	if err != nil {
 		return fmt.Errorf("error reading max confirmation range from db file: "+
-			"%v", err)
+			"%w", err)
 	}
 	if len(maxConfirmsBytes) != 4 {
 		return errors.New("wrong number of bytes in stored maxConfirms")
@@ -367,7 +367,7 @@ func (stats *Estimator) loadFromDatabase(replaceBuckets bool) error {
 
 	feesBytes, err := stats.db.Get(dbKeyBucketFees, nil)
 	if err != nil {
-		return fmt.Errorf("error reading fee bounds from db file: %v", err)
+		return fmt.Errorf("error reading fee bounds from db file: %w", err)
 	}
 	if feesBytes == nil {
 		return errors.New("fee bounds not found in database file")
@@ -381,7 +381,7 @@ func (stats *Estimator) loadFromDatabase(replaceBuckets bool) error {
 	err = binary.Read(bytes.NewReader(feesBytes), dbByteOrder,
 		&fileBucketFees)
 	if err != nil {
-		return fmt.Errorf("error decoding file bucket fees: %v", err)
+		return fmt.Errorf("error decoding file bucket fees: %w", err)
 	}
 
 	if !replaceBuckets {
@@ -450,7 +450,7 @@ func (stats *Estimator) loadFromDatabase(replaceBuckets bool) error {
 	}
 	err = iter.Error()
 	if err != nil {
-		return fmt.Errorf("error on bucket iterator: %v", err)
+		return fmt.Errorf("error on bucket iterator: %w", err)
 	}
 
 	stats.bucketFeeBounds = fileBucketFees
@@ -502,8 +502,7 @@ func (stats *Estimator) updateDatabase() error {
 
 	err := stats.db.Write(batch, nil)
 	if err != nil {
-		return fmt.Errorf("error writing update to estimator db file: %v",
-			err)
+		return fmt.Errorf("error writing update to estimator db file: %w", err)
 	}
 
 	return nil
diff --git a/internal/staging/banmanager/banmanager.go b/internal/staging/banmanager/banmanager.go
index 96ceb519d4..f85bfb81e5 100644
--- a/internal/staging/banmanager/banmanager.go
+++ b/internal/staging/banmanager/banmanager.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2021 The Decred developers
+// Copyright (c) 2021-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -119,7 +119,7 @@ func (bm *BanManager) AddPeer(p *peer.Peer) error {
 	host, _, err := net.SplitHostPort(p.Addr())
 	if err != nil {
 		p.Disconnect()
-		return fmt.Errorf("cannot split hostport %v", err)
+		return fmt.Errorf("cannot split hostport %w", err)
 	}
 
 	bm.mtx.Lock()
diff --git a/rpcclient/infrastructure.go b/rpcclient/infrastructure.go
index a764709dc3..d9285b7f3c 100644
--- a/rpcclient/infrastructure.go
+++ b/rpcclient/infrastructure.go
@@ -759,7 +759,7 @@ func (c *Client) handleSendPostMessage(details *sendPostDetails) {
 	respBytes, err := io.ReadAll(httpResponse.Body)
 	httpResponse.Body.Close()
 	if err != nil {
-		err = fmt.Errorf("error reading json reply: %v", err)
+		err = fmt.Errorf("error reading json reply: %w", err)
 		jReq.responseChan <- &response{err: err}
 		return
 	}
diff --git a/service_windows.go b/service_windows.go
index a85c63d865..931e13fa04 100644
--- a/service_windows.go
+++ b/service_windows.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2016 The btcsuite developers
-// Copyright (c) 2015-2016 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -183,13 +183,13 @@ func startService() error {
 
 	service, err := serviceManager.OpenService(svcName)
 	if err != nil {
-		return fmt.Errorf("could not access service: %v", err)
+		return fmt.Errorf("could not access service: %w", err)
 	}
 	defer service.Close()
 
 	err = service.Start(os.Args...)
 	if err != nil {
-		return fmt.Errorf("could not start service: %v", err)
+		return fmt.Errorf("could not start service: %w", err)
 	}
 
 	return nil
@@ -208,13 +208,13 @@ func controlService(c svc.Cmd, to svc.State) error {
 
 	service, err := serviceManager.OpenService(svcName)
 	if err != nil {
-		return fmt.Errorf("could not access service: %v", err)
+		return fmt.Errorf("could not access service: %w", err)
 	}
 	defer service.Close()
 
 	status, err := service.Control(c)
 	if err != nil {
-		return fmt.Errorf("could not send control=%d: %v", c, err)
+		return fmt.Errorf("could not send control=%d: %w", c, err)
 	}
 
 	// Send the control message.
@@ -227,8 +227,7 @@ func controlService(c svc.Cmd, to svc.State) error {
 		time.Sleep(300 * time.Millisecond)
 		status, err = service.Query()
 		if err != nil {
-			return fmt.Errorf("could not retrieve service "+
-				"status: %v", err)
+			return fmt.Errorf("could not retrieve service status: %w", err)
 		}
 	}
 
diff --git a/txscript/sign/sign.go b/txscript/sign/sign.go
index 1406ab9395..dc3f0c536d 100644
--- a/txscript/sign/sign.go
+++ b/txscript/sign/sign.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2015 The btcsuite developers
-// Copyright (c) 2015-2021 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -48,14 +48,14 @@ func RawTxInSignature(tx *wire.MsgTx, idx int, subScript []byte,
 		}
 		sig, err := priv.Sign(hash)
 		if err != nil {
-			return nil, fmt.Errorf("cannot sign tx input: %s", err)
+			return nil, fmt.Errorf("cannot sign tx input: %w", err)
 		}
 		sigBytes = sig.Serialize()
 	case dcrec.STSchnorrSecp256k1:
 		priv := secp256k1.PrivKeyFromBytes(key)
 		sig, err := schnorr.Sign(priv, hash)
 		if err != nil {
-			return nil, fmt.Errorf("cannot sign tx input: %s", err)
+			return nil, fmt.Errorf("cannot sign tx input: %w", err)
 		}
 		sigBytes = sig.Serialize()
 	default:
@@ -645,7 +645,7 @@ func TSpendSignatureScript(msgTx *wire.MsgTx, privKey []byte) ([]byte, error) {
 	priv := secp256k1.PrivKeyFromBytes(privKey)
 	sig, err := schnorr.Sign(priv, hash)
 	if err != nil {
-		return nil, fmt.Errorf("cannot sign tx input: %s", err)
+		return nil, fmt.Errorf("cannot sign tx input: %w", err)
 	}
 	sigBytes := sig.Serialize()
 	pkBytes := priv.PubKey().SerializeCompressed()
diff --git a/txscript/sign/sign_test.go b/txscript/sign/sign_test.go
index 58bca15055..8f323222f4 100644
--- a/txscript/sign/sign_test.go
+++ b/txscript/sign/sign_test.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2016 The btcsuite developers
-// Copyright (c) 2015-2021 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -103,14 +103,12 @@ func checkScripts(msg string, tx *wire.MsgTx, idx int, sigScript, pkScript []byt
 	var scriptFlags txscript.ScriptFlags
 	vm, err := txscript.NewEngine(pkScript, tx, idx, scriptFlags, 0, nil)
 	if err != nil {
-		return fmt.Errorf("failed to make script engine for %s: %v",
-			msg, err)
+		return fmt.Errorf("failed to make script engine for %s: %w", msg, err)
 	}
 
 	err = vm.Execute()
 	if err != nil {
-		return fmt.Errorf("invalid script signature for %s: %v", msg,
-			err)
+		return fmt.Errorf("invalid script signature for %s: %w", msg, err)
 	}
 
 	return nil
@@ -123,7 +121,7 @@ func signAndCheck(msg string, tx *wire.MsgTx, idx int, pkScript []byte,
 	sigScript, err := SignTxOutput(testingParams, tx, idx, pkScript,
 		hashType, kdb, sdb, nil, isTreasuryEnabled)
 	if err != nil {
-		return fmt.Errorf("failed to sign output %s: %v", msg, err)
+		return fmt.Errorf("failed to sign output %s: %w", msg, err)
 	}
 
 	return checkScripts(msg, tx, idx, sigScript, pkScript)
@@ -140,7 +138,7 @@ func signBadAndCheck(msg string, tx *wire.MsgTx, idx int, pkScript []byte,
 	sigScript, err := SignTxOutput(testingParams, tx,
 		idx, pkScript, hashType, kdb, sdb, nil, isTreasuryEnabled)
 	if err != nil {
-		return fmt.Errorf("failed to sign output %s: %v", msg, err)
+		return fmt.Errorf("failed to sign output %s: %w", msg, err)
 	}
 
 	// Be sure to reset the value in when we're done creating the
diff --git a/wire/error.go b/wire/error.go
index df41e642ff..9f6ebd2b31 100644
--- a/wire/error.go
+++ b/wire/error.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2015 The btcsuite developers
-// Copyright (c) 2015-2020 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -222,8 +222,8 @@ func (m MessageError) Error() string {
 }
 
 // messageError creates an Error given a set of arguments.
-func messageError(Func string, c ErrorCode, desc string) *MessageError {
-	return &MessageError{Func: Func, ErrorCode: c, Description: desc}
+func messageError(funcName string, c ErrorCode, desc string) *MessageError {
+	return &MessageError{Func: funcName, ErrorCode: c, Description: desc}
 }
 
 // Is implements the interface to work with the standard library's errors.Is.