zpay32: migrate fuzz tests

zpay32/fuzz_test.go

@@ -0,0 +1,64 @@
+package zpay32
+
+import (
+	"encoding/hex"
+	"fmt"
+	"testing"
+
+	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/btcsuite/btcd/btcec/v2/ecdsa"
+	"github.com/btcsuite/btcd/chaincfg"
+	"github.com/btcsuite/btcd/chaincfg/chainhash"
+)
+
+func Fuzz_decode(f *testing.F) {
+	f.Fuzz(func(t *testing.T, data string) {
+		inv, err := Decode(data, &chaincfg.TestNet3Params)
+		if err != nil {
+			return
+		}
+
+		// Call these functions as a sanity check to make sure the
+		// invoice is well-formed.
+		_ = inv.MinFinalCLTVExpiry()
+		_ = inv.Expiry()
+	})
+}
+
+func Fuzz_encode(f *testing.F) {
+	f.Fuzz(func(t *testing.T, data string) {
+		inv, err := Decode(data, &chaincfg.TestNet3Params)
+		if err != nil {
+			return
+		}
+
+		// Call these functions as a sanity check to make sure the
+		// invoice is well-formed.
+		_ = inv.MinFinalCLTVExpiry()
+		_ = inv.Expiry()
+
+		// Initialize the static key we will be using for this fuzz
+		// test.
+		testPrivKeyBytes, _ := hex.DecodeString("e126f68f7eafcc8b74f54d269fe206be715000f94dac067d1c04a8ca3b2db734")
+		testPrivKey, _ := btcec.PrivKeyFromBytes(testPrivKeyBytes)
+
+		// Then, initialize the testMessageSigner so we can encode out
+		// invoices with this private key.
+		testMessageSigner := MessageSigner{
+			SignCompact: func(msg []byte) ([]byte, error) {
+				hash := chainhash.HashB(msg)
+				sig, err := ecdsa.SignCompact(testPrivKey, hash, true)
+				if err != nil {
+					return nil,
+						fmt.Errorf("can't sign the "+
+							"message: %v", err)
+				}
+				return sig, nil
+			},
+		}
+		_, err = inv.Encode(testMessageSigner)
+		if err != nil {
+			return
+		}
+	})
+}