chore: fmt.Errorf(static) → errors.New

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

chain/chain.go

@@ -8,10 +8,11 @@
 package chain
 
 import (
+	"errors"
 	"fmt"
 
-	store "forge.lthn.ai/core/go-store"
 	"forge.lthn.ai/core/go-blockchain/types"
+	store "forge.lthn.ai/core/go-store"
 )
 
 // Chain manages blockchain storage and indexing.
@@ -41,7 +42,7 @@ func (c *Chain) TopBlock() (*types.Block, *BlockMeta, error) {
 		return nil, nil, err
 	}
 	if h == 0 {
-		return nil, nil, fmt.Errorf("chain: no blocks stored")
+		return nil, nil, errors.New("chain: no blocks stored")
 	}
 	return c.GetBlockByHeight(h - 1)
 }

chain/sync.go

@@ -10,6 +10,7 @@ import (
 	"context"
 	"encoding/hex"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"log"
 	"regexp"
@@ -413,7 +414,7 @@ var aggregatedRE = regexp.MustCompile(`"AGGREGATED"\s*:\s*\{([^}]+)\}`)
 func parseBlockHeader(objectInJSON string) (*types.BlockHeader, error) {
 	m := aggregatedRE.FindStringSubmatch(objectInJSON)
 	if m == nil {
-		return nil, fmt.Errorf("AGGREGATED section not found in object_in_json")
+		return nil, errors.New("AGGREGATED section not found in object_in_json")
 	}
 
 	var hj blockHeaderJSON

chain/validate.go

@@ -7,6 +7,7 @@ package chain
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 
 	"forge.lthn.ai/core/go-blockchain/config"
@@ -31,7 +32,7 @@ func (c *Chain) ValidateHeader(b *types.Block, expectedHeight uint64) error {
 	// Genesis block: prev_id must be zero.
 	if expectedHeight == 0 {
 		if !b.PrevID.IsZero() {
-			return fmt.Errorf("validate: genesis block has non-zero prev_id")
+			return errors.New("validate: genesis block has non-zero prev_id")
 		}
 		return nil
 	}

consensus/reward.go

@@ -6,6 +6,7 @@
 package consensus
 
 import (
+	"errors"
 	"fmt"
 	"math/bits"
 
@@ -55,7 +56,7 @@ func BlockReward(baseReward, blockSize, medianSize uint64) (uint64, error) {
 
 	// Since hi1 should be 0 for reasonable block sizes, simplify:
 	if hi1 > 0 {
-		return 0, fmt.Errorf("consensus: reward overflow")
+		return 0, errors.New("consensus: reward overflow")
 	}
 	hi2, lo2 := bits.Mul64(baseReward, lo1)
 

consensus/verify.go

@@ -6,6 +6,7 @@
 package consensus
 
 import (
+	"errors"
 	"fmt"
 
 	"forge.lthn.ai/core/go-blockchain/config"
@@ -222,7 +223,7 @@ func verifyV2Signatures(tx *types.Transaction, getZCRingOutputs ZCRingOutputsFn)
 	// Verify BPP range proof if present.
 	if len(proofs.bppProofBytes) > 0 && len(proofs.bppCommitments) > 0 {
 		if !crypto.VerifyBPP(proofs.bppProofBytes, proofs.bppCommitments) {
-			return fmt.Errorf("consensus: BPP range proof verification failed")
+			return errors.New("consensus: BPP range proof verification failed")
 		}
 	}
 

crypto/clsag.go

@@ -8,7 +8,7 @@ package crypto
 import "C"
 
 import (
-	"fmt"
+	"errors"
 	"unsafe"
 )
 
@@ -20,7 +20,7 @@ func PointMul8(pk [32]byte) ([32]byte, error) {
 		(*C.uint8_t)(unsafe.Pointer(&result[0])),
 	)
 	if rc != 0 {
-		return result, fmt.Errorf("crypto: point_mul8 failed")
+		return result, errors.New("crypto: point_mul8 failed")
 	}
 	return result, nil
 }
@@ -34,7 +34,7 @@ func PointDiv8(pk [32]byte) ([32]byte, error) {
 		(*C.uint8_t)(unsafe.Pointer(&result[0])),
 	)
 	if rc != 0 {
-		return result, fmt.Errorf("crypto: point_div8 failed")
+		return result, errors.New("crypto: point_div8 failed")
 	}
 	return result, nil
 }
@@ -48,7 +48,7 @@ func PointSub(a, b [32]byte) ([32]byte, error) {
 		(*C.uint8_t)(unsafe.Pointer(&result[0])),
 	)
 	if rc != 0 {
-		return result, fmt.Errorf("crypto: point_sub failed")
+		return result, errors.New("crypto: point_sub failed")
 	}
 	return result, nil
 }
@@ -81,7 +81,7 @@ func GenerateCLSAGGG(hash [32]byte, ring []byte, ringSize int,
 		(*C.uint8_t)(unsafe.Pointer(&sig[0])),
 	)
 	if rc != 0 {
-		return nil, fmt.Errorf("crypto: generate_CLSAG_GG failed")
+		return nil, errors.New("crypto: generate_CLSAG_GG failed")
 	}
 	return sig, nil
 }

crypto/keygen.go

@@ -8,6 +8,7 @@ package crypto
 import "C"
 
 import (
+	"errors"
 	"fmt"
 	"unsafe"
 )
@@ -51,7 +52,7 @@ func GenerateKeyDerivation(pub [32]byte, sec [32]byte) ([32]byte, error) {
 		(*C.uint8_t)(unsafe.Pointer(&d[0])),
 	)
 	if rc != 0 {
-		return d, fmt.Errorf("crypto: generate_key_derivation failed")
+		return d, errors.New("crypto: generate_key_derivation failed")
 	}
 	return d, nil
 }
@@ -66,7 +67,7 @@ func DerivePublicKey(derivation [32]byte, index uint64, base [32]byte) ([32]byte
 		(*C.uint8_t)(unsafe.Pointer(&derived[0])),
 	)
 	if rc != 0 {
-		return derived, fmt.Errorf("crypto: derive_public_key failed")
+		return derived, errors.New("crypto: derive_public_key failed")
 	}
 	return derived, nil
 }
@@ -81,7 +82,7 @@ func DeriveSecretKey(derivation [32]byte, index uint64, base [32]byte) ([32]byte
 		(*C.uint8_t)(unsafe.Pointer(&derived[0])),
 	)
 	if rc != 0 {
-		return derived, fmt.Errorf("crypto: derive_secret_key failed")
+		return derived, errors.New("crypto: derive_secret_key failed")
 	}
 	return derived, nil
 }

crypto/keyimage.go

@@ -8,7 +8,7 @@ package crypto
 import "C"
 
 import (
-	"fmt"
+	"errors"
 	"unsafe"
 )
 
@@ -22,7 +22,7 @@ func GenerateKeyImage(pub [32]byte, sec [32]byte) ([32]byte, error) {
 		(*C.uint8_t)(unsafe.Pointer(&ki[0])),
 	)
 	if rc != 0 {
-		return ki, fmt.Errorf("crypto: generate_key_image failed")
+		return ki, errors.New("crypto: generate_key_image failed")
 	}
 	return ki, nil
 }

crypto/signature.go

@@ -8,7 +8,7 @@ package crypto
 import "C"
 
 import (
-	"fmt"
+	"errors"
 	"unsafe"
 )
 
@@ -22,7 +22,7 @@ func GenerateSignature(hash [32]byte, pub [32]byte, sec [32]byte) ([64]byte, err
 		(*C.uint8_t)(unsafe.Pointer(&sig[0])),
 	)
 	if rc != 0 {
-		return sig, fmt.Errorf("crypto: generate_signature failed")
+		return sig, errors.New("crypto: generate_signature failed")
 	}
 	return sig, nil
 }
@@ -60,7 +60,7 @@ func GenerateRingSignature(hash [32]byte, image [32]byte, pubs [][32]byte,
 		(*C.uint8_t)(unsafe.Pointer(&flatSigs[0])),
 	)
 	if rc != 0 {
-		return nil, fmt.Errorf("crypto: generate_ring_signature failed")
+		return nil, errors.New("crypto: generate_ring_signature failed")
 	}
 
 	sigs := make([][64]byte, n)

wallet/account.go

@@ -15,6 +15,7 @@ import (
 	"crypto/rand"
 	"encoding/hex"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 
@@ -54,8 +55,8 @@ type Account struct {
 	SpendSecretKey types.SecretKey `json:"spend_secret_key"`
 	ViewPublicKey  types.PublicKey `json:"view_public_key"`
 	ViewSecretKey  types.SecretKey `json:"view_secret_key"`
-	CreatedAt      uint64         `json:"created_at"`
-	Flags          uint8          `json:"flags"`
+	CreatedAt      uint64          `json:"created_at"`
+	Flags          uint8           `json:"flags"`
 }
 
 // GenerateAccount creates a new account with random spend keys and a
@@ -162,7 +163,7 @@ func LoadAccount(s *store.Store, password string) (*Account, error) {
 	}
 
 	if len(blob) < saltLen+nonceLen+1 {
-		return nil, fmt.Errorf("wallet: account data too short")
+		return nil, errors.New("wallet: account data too short")
 	}
 
 	salt := blob[:saltLen]

wallet/builder.go

@@ -11,6 +11,7 @@ package wallet
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"sort"
 
@@ -170,7 +171,7 @@ func (b *V1Builder) buildInput(src *Transfer) (types.TxInputToKey, inputMeta, er
 		}
 	}
 	if realIdx < 0 {
-		return types.TxInputToKey{}, inputMeta{}, fmt.Errorf("real output not found in ring")
+		return types.TxInputToKey{}, inputMeta{}, errors.New("real output not found in ring")
 	}
 
 	// Build key offsets and public key list.

wallet/mnemonic.go

@@ -2,6 +2,7 @@ package wallet
 
 import (
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"hash/crc32"
 	"strings"
@@ -43,7 +44,7 @@ func MnemonicDecode(phrase string) ([32]byte, error) {
 
 	expected := checksumIndex(words[:24])
 	if words[24] != words[expected] {
-		return key, fmt.Errorf("wallet: mnemonic checksum failed")
+		return key, errors.New("wallet: mnemonic checksum failed")
 	}
 
 	n := uint32(numWords)

wallet/wallet.go

@@ -10,15 +10,16 @@
 package wallet
 
 import (
+	"errors"
 	"fmt"
 	"sort"
 	"strconv"
 
-	store "forge.lthn.ai/core/go-store"
 	"forge.lthn.ai/core/go-blockchain/chain"
 	"forge.lthn.ai/core/go-blockchain/rpc"
 	"forge.lthn.ai/core/go-blockchain/types"
 	"forge.lthn.ai/core/go-blockchain/wire"
+	store "forge.lthn.ai/core/go-store"
 )
 
 const (
@@ -165,7 +166,7 @@ func (w *Wallet) Balance() (confirmed, locked uint64, err error) {
 // Send constructs and submits a transaction.
 func (w *Wallet) Send(destinations []Destination, fee uint64) (*types.Transaction, error) {
 	if w.builder == nil || w.client == nil {
-		return nil, fmt.Errorf("wallet: no RPC client configured")
+		return nil, errors.New("wallet: no RPC client configured")
 	}
 
 	chainHeight, err := w.chain.Height()