BatchVerifier: Rename and unexport local functions in verify/txn

data/transactions/verify/txn.go

@@ -99,42 +99,26 @@ func (g *GroupContext) Equal(other *GroupContext) bool {
 		g.minAvmVersion == other.minAvmVersion
 }
 
-// Txn verifies a SignedTxn as being signed and having no obviously inconsistent data.
+// txnBatchVerifyPrep verifies a SignedTxn having no obviously inconsistent data.
 // Block-assembly time checks of LogicSig and accounting rules may still block the txn.
-func Txn(s *transactions.SignedTxn, txnIdx int, groupCtx *GroupContext) error {
-	batchVerifier := crypto.MakeBatchVerifier()
-
-	if err := TxnBatchVerify(s, txnIdx, groupCtx, batchVerifier); err != nil {
-		return err
-	}
-
-	// this case is used for comapact certificate where no signature is supplied
-	if batchVerifier.GetNumberOfEnqueuedSignatures() == 0 {
-		return nil
-	}
-	return batchVerifier.Verify()
-}
-
-// TxnBatchVerify verifies a SignedTxn having no obviously inconsistent data.
-// Block-assembly time checks of LogicSig and accounting rules may still block the txn.
-// it is the caller responsibility to call batchVerifier.verify()
-func TxnBatchVerify(s *transactions.SignedTxn, txnIdx int, groupCtx *GroupContext, verifier *crypto.BatchVerifier) error {
+// it is the caller responsibility to call batchVerifier.Verify()
+func txnBatchVerifyPrep(s *transactions.SignedTxn, txnIdx int, groupCtx *GroupContext, verifier *crypto.BatchVerifier) error {
 	if !groupCtx.consensusParams.SupportRekeying && (s.AuthAddr != basics.Address{}) {
-		return errors.New("nonempty AuthAddr but rekeying not supported")
+		return errors.New("nonempty AuthAddr but rekeying is not supported")
 	}
 
 	if err := s.Txn.WellFormed(groupCtx.specAddrs, groupCtx.consensusParams); err != nil {
 		return err
 	}
 
-	return stxnVerifyCore(s, txnIdx, groupCtx, verifier)
+	return stxnCoreChecks(s, txnIdx, groupCtx, verifier)
 }
 
 // TxnGroup verifies a []SignedTxn as being signed and having no obviously inconsistent data.
 func TxnGroup(stxs []transactions.SignedTxn, contextHdr bookkeeping.BlockHeader, cache VerifiedTransactionCache, ledger logic.LedgerForSignature) (groupCtx *GroupContext, err error) {
 	batchVerifier := crypto.MakeBatchVerifier()
 
-	if groupCtx, err = TxnGroupBatchVerify(stxs, contextHdr, cache, ledger, batchVerifier); err != nil {
+	if groupCtx, err = txnGroupBatchVerifyPrep(stxs, contextHdr, cache, ledger, batchVerifier); err != nil {
 		return nil, err
 	}
 
@@ -149,9 +133,9 @@ func TxnGroup(stxs []transactions.SignedTxn, contextHdr bookkeeping.BlockHeader,
 	return
 }
 
-// TxnGroupBatchVerify verifies a []SignedTxn having no obviously inconsistent data.
-// it is the caller responsibility to call batchVerifier.verify()
-func TxnGroupBatchVerify(stxs []transactions.SignedTxn, contextHdr bookkeeping.BlockHeader, cache VerifiedTransactionCache, ledger logic.LedgerForSignature, verifier *crypto.BatchVerifier) (groupCtx *GroupContext, err error) {
+// txnGroupBatchVerifyPrep verifies a []SignedTxn having no obviously inconsistent data.
+// it is the caller responsibility to call batchVerifier.Verify()
+func txnGroupBatchVerifyPrep(stxs []transactions.SignedTxn, contextHdr bookkeeping.BlockHeader, cache VerifiedTransactionCache, ledger logic.LedgerForSignature, verifier *crypto.BatchVerifier) (groupCtx *GroupContext, err error) {
 	groupCtx, err = PrepareGroupContext(stxs, contextHdr, ledger)
 	if err != nil {
 		return nil, err
@@ -160,7 +144,7 @@ func TxnGroupBatchVerify(stxs []transactions.SignedTxn, contextHdr bookkeeping.B
 	minFeeCount := uint64(0)
 	feesPaid := uint64(0)
 	for i, stxn := range stxs {
-		err = TxnBatchVerify(&stxn, i, groupCtx, verifier)
+		err = txnBatchVerifyPrep(&stxn, i, groupCtx, verifier)
 		if err != nil {
 			err = fmt.Errorf("transaction %+v invalid : %w", stxn, err)
 			return
@@ -190,7 +174,7 @@ func TxnGroupBatchVerify(stxs []transactions.SignedTxn, contextHdr bookkeeping.B
 	return
 }
 
-func stxnVerifyCore(s *transactions.SignedTxn, txnIdx int, groupCtx *GroupContext, batchVerifier *crypto.BatchVerifier) error {
+func stxnCoreChecks(s *transactions.SignedTxn, txnIdx int, groupCtx *GroupContext, batchVerifier *crypto.BatchVerifier) error {
 	numSigs := 0
 	hasSig := false
 	hasMsig := false
@@ -246,7 +230,7 @@ func stxnVerifyCore(s *transactions.SignedTxn, txnIdx int, groupCtx *GroupContex
 func LogicSigSanityCheck(txn *transactions.SignedTxn, groupIndex int, groupCtx *GroupContext) error {
 	batchVerifier := crypto.MakeBatchVerifier()
 
-	if err := LogicSigSanityCheckBatchVerify(txn, groupIndex, groupCtx, batchVerifier); err != nil {
+	if err := logicSigSanityCheckBatchVerifyPrep(txn, groupIndex, groupCtx, batchVerifier); err != nil {
 		return err
 	}
 
@@ -258,10 +242,10 @@ func LogicSigSanityCheck(txn *transactions.SignedTxn, groupIndex int, groupCtx *
 	return batchVerifier.Verify()
 }
 
-// LogicSigSanityCheckBatchVerify checks that the signature is valid and that the program is basically well formed.
+// logicSigSanityCheckBatchVerifyPrep checks that the signature is valid and that the program is basically well formed.
 // It does not evaluate the logic.
-// it is the caller responsibility to call batchVerifier.verify()
-func LogicSigSanityCheckBatchVerify(txn *transactions.SignedTxn, groupIndex int, groupCtx *GroupContext, batchVerifier *crypto.BatchVerifier) error {
+// it is the caller responsibility to call batchVerifier.Verify()
+func logicSigSanityCheckBatchVerifyPrep(txn *transactions.SignedTxn, groupIndex int, groupCtx *GroupContext, batchVerifier *crypto.BatchVerifier) error {
 	lsig := txn.Lsig
 
 	if groupCtx.consensusParams.LogicSigVersion == 0 {
@@ -404,7 +388,7 @@ func PaysetGroups(ctx context.Context, payset [][]transactions.SignedTxn, blkHea
 
 					batchVerifier := crypto.MakeBatchVerifierWithHint(len(payset))
 					for i, signTxnsGrp := range txnGroups {
-						groupCtxs[i], grpErr = TxnGroupBatchVerify(signTxnsGrp, blkHeader, nil, ledger, batchVerifier)
+						groupCtxs[i], grpErr = txnGroupBatchVerifyPrep(signTxnsGrp, blkHeader, nil, ledger, batchVerifier)
 						// abort only if it's a non-cache error.
 						if grpErr != nil {
 							return grpErr

data/transactions/verify/txn_test.go

@@ -51,6 +51,20 @@ var spec = transactions.SpecialAddresses{
 	RewardsPool: poolAddr,
 }
 
+func verifyTxn(s *transactions.SignedTxn, txnIdx int, groupCtx *GroupContext) error {
+	batchVerifier := crypto.MakeBatchVerifier()
+
+	if err := txnBatchVerifyPrep(s, txnIdx, groupCtx, batchVerifier); err != nil {
+		return err
+	}
+
+	// this case is used for comapact certificate where no signature is supplied
+	if batchVerifier.GetNumberOfEnqueuedSignatures() == 0 {
+		return nil
+	}
+	return batchVerifier.Verify()
+}
+
 func keypair() *crypto.SignatureSecrets {
 	var seed crypto.Seed
 	crypto.RandBytes(seed[:])
@@ -117,14 +131,14 @@ func TestSignedPayment(t *testing.T) {
 	groupCtx, err := PrepareGroupContext(stxns, blockHeader, nil)
 	require.NoError(t, err)
 	require.NoError(t, payment.WellFormed(spec, proto), "generateTestObjects generated an invalid payment")
-	require.NoError(t, Txn(&stxn, 0, groupCtx), "generateTestObjects generated a bad signedtxn")
+	require.NoError(t, verifyTxn(&stxn, 0, groupCtx), "generateTestObjects generated a bad signedtxn")
 
 	stxn2 := payment.Sign(secret)
 	require.Equal(t, stxn2.Sig, stxn.Sig, "got two different signatures for the same transaction (our signing function is deterministic)")
 
 	stxn2.MessUpSigForTesting()
 	require.Equal(t, stxn.ID(), stxn2.ID(), "changing sig caused txid to change")
-	require.Error(t, Txn(&stxn2, 0, groupCtx), "verify succeeded with bad sig")
+	require.Error(t, verifyTxn(&stxn2, 0, groupCtx), "verify succeeded with bad sig")
 
 	require.True(t, crypto.SignatureVerifier(addr).Verify(payment, stxn.Sig), "signature on the transaction is not the signature of the hash of the transaction under the spender's key")
 }
@@ -137,15 +151,15 @@ func TestTxnValidationEncodeDecode(t *testing.T) {
 	for _, txn := range signed {
 		groupCtx, err := PrepareGroupContext([]transactions.SignedTxn{txn}, blockHeader, nil)
 		require.NoError(t, err)
-		if Txn(&txn, 0, groupCtx) != nil {
+		if verifyTxn(&txn, 0, groupCtx) != nil {
 			t.Errorf("signed transaction %#v did not verify", txn)
 		}
 
 		x := protocol.Encode(&txn)
 		var signedTx transactions.SignedTxn
 		protocol.Decode(x, &signedTx)
 
-		if Txn(&signedTx, 0, groupCtx) != nil {
+		if verifyTxn(&signedTx, 0, groupCtx) != nil {
 			t.Errorf("signed transaction %#v did not verify", txn)
 		}
 	}
@@ -159,14 +173,14 @@ func TestTxnValidationEmptySig(t *testing.T) {
 	for _, txn := range signed {
 		groupCtx, err := PrepareGroupContext([]transactions.SignedTxn{txn}, blockHeader, nil)
 		require.NoError(t, err)
-		if Txn(&txn, 0, groupCtx) != nil {
+		if verifyTxn(&txn, 0, groupCtx) != nil {
 			t.Errorf("signed transaction %#v did not verify", txn)
 		}
 
 		txn.Sig = crypto.Signature{}
 		txn.Msig = crypto.MultisigSig{}
 		txn.Lsig = transactions.LogicSig{}
-		if Txn(&txn, 0, groupCtx) == nil {
+		if verifyTxn(&txn, 0, groupCtx) == nil {
 			t.Errorf("transaction %#v verified without sig", txn)
 		}
 	}
@@ -205,42 +219,42 @@ func TestTxnValidationStateProof(t *testing.T) {
 	groupCtx, err := PrepareGroupContext([]transactions.SignedTxn{stxn}, blockHeader, nil)
 	require.NoError(t, err)
 
-	err = Txn(&stxn, 0, groupCtx)
+	err = verifyTxn(&stxn, 0, groupCtx)
 	require.NoError(t, err, "state proof txn %#v did not verify", stxn)
 
 	stxn2 := stxn
 	stxn2.Txn.Type = protocol.PaymentTx
 	stxn2.Txn.Header.Fee = basics.MicroAlgos{Raw: proto.MinTxnFee}
-	err = Txn(&stxn2, 0, groupCtx)
+	err = verifyTxn(&stxn2, 0, groupCtx)
 	require.Error(t, err, "payment txn %#v verified from StateProofSender", stxn2)
 
 	secret := keypair()
 	stxn2 = stxn
 	stxn2.Txn.Header.Sender = basics.Address(secret.SignatureVerifier)
 	stxn2.Txn.Header.Fee = basics.MicroAlgos{Raw: proto.MinTxnFee}
 	stxn2 = stxn2.Txn.Sign(secret)
-	err = Txn(&stxn2, 0, groupCtx)
+	err = verifyTxn(&stxn2, 0, groupCtx)
 	require.Error(t, err, "state proof txn %#v verified from non-StateProofSender", stxn2)
 
 	// state proof txns are not allowed to have non-zero values for many fields
 	stxn2 = stxn
 	stxn2.Txn.Header.Fee = basics.MicroAlgos{Raw: proto.MinTxnFee}
-	err = Txn(&stxn2, 0, groupCtx)
+	err = verifyTxn(&stxn2, 0, groupCtx)
 	require.Error(t, err, "state proof txn %#v verified", stxn2)
 
 	stxn2 = stxn
 	stxn2.Txn.Header.Note = []byte{'A'}
-	err = Txn(&stxn2, 0, groupCtx)
+	err = verifyTxn(&stxn2, 0, groupCtx)
 	require.Error(t, err, "state proof txn %#v verified", stxn2)
 
 	stxn2 = stxn
 	stxn2.Txn.Lease[0] = 1
-	err = Txn(&stxn2, 0, groupCtx)
+	err = verifyTxn(&stxn2, 0, groupCtx)
 	require.Error(t, err, "state proof txn %#v verified", stxn2)
 
 	stxn2 = stxn
 	stxn2.Txn.RekeyTo = basics.Address(secret.SignatureVerifier)
-	err = Txn(&stxn2, 0, groupCtx)
+	err = verifyTxn(&stxn2, 0, groupCtx)
 	require.Error(t, err, "state proof txn %#v verified", stxn2)
 }
 
@@ -258,7 +272,7 @@ func TestDecodeNil(t *testing.T) {
 		// This used to panic when run on a zero value of SignedTxn.
 		groupCtx, err := PrepareGroupContext([]transactions.SignedTxn{st}, blockHeader, nil)
 		require.NoError(t, err)
-		Txn(&st, 0, groupCtx)
+		verifyTxn(&st, 0, groupCtx)
 	}
 }
 
@@ -425,7 +439,7 @@ func BenchmarkTxn(b *testing.B) {
 		groupCtx, err := PrepareGroupContext(txnGroup, blk.BlockHeader, nil)
 		require.NoError(b, err)
 		for i, txn := range txnGroup {
-			err := Txn(&txn, i, groupCtx)
+			err := verifyTxn(&txn, i, groupCtx)
 			require.NoError(b, err)
 		}
 	}

test/e2e-go/upgrades/rekey_support_test.go

@@ -128,8 +128,8 @@ func TestRekeyUpgrade(t *testing.T) {
 	_, err = client.BroadcastTransaction(rekeyed)
 	// non empty err means the upgrade have not happened yet (as expected), ensure the error
 	if err != nil {
-		// should be either "nonempty AuthAddr but rekeying not supported" or "txn dead"
-		if !strings.Contains(err.Error(), "nonempty AuthAddr but rekeying not supported") &&
+		// should be either "nonempty AuthAddr but rekeying is not supported" or "txn dead"
+		if !strings.Contains(err.Error(), "nonempty AuthAddr but rekeying is not supported") &&
 			!strings.Contains(err.Error(), "txn dead") {
 			a.NoErrorf(err, "error message should be one of :\n%s\n%s", "nonempty AuthAddr but rekeying not supported", "txn dead")
 		}