address from private key

address.go

@@ -0,0 +1,19 @@
+package bitcoin
+
+import (
+	"github.com/bitcoinsv/bsvd/bsvec"
+	"github.com/bitcoinsv/bsvd/chaincfg"
+	"github.com/bitcoinsv/bsvutil"
+)
+
+func AddressFromPrivKey(privKey string) string {
+	pubKey := PrivateKey(privKey).PubKey()
+	return Address(pubKey).EncodeAddress()
+}
+
+// Address gets a bsvutil.LegacyAddressPubKeyHash
+func Address(publicKey *bsvec.PublicKey) (address *bsvutil.LegacyAddressPubKeyHash) {
+	publicKeyHash := bsvutil.Hash160(publicKey.SerializeCompressed())
+	address, _ = bsvutil.NewLegacyAddressPubKeyHash(publicKeyHash, &chaincfg.MainNetParams)
+	return
+}

go.mod

@@ -4,6 +4,7 @@ go 1.14
 
 require (
 	github.com/bitcoinsv/bsvd v0.0.0-20190609155523-4c29707f7173
+	github.com/bitcoinsv/bsvutil v0.0.0-20181216182056-1d77cf353ea9
 	github.com/itchyny/base58-go v0.1.0
 	github.com/piotrnar/gocoin v0.0.0-20200912093848-56d57d5b6be5
 	golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a

go.sum

@@ -1,5 +1,7 @@
 github.com/bitcoinsv/bsvd v0.0.0-20190609155523-4c29707f7173 h1:2yTIV9u7H0BhRDGXH5xrAwAz7XibWJtX2dNezMeNsUo=
 github.com/bitcoinsv/bsvd v0.0.0-20190609155523-4c29707f7173/go.mod h1:BZ1UcC9+tmcDEcdVXgpt13hMczwJxWzpAn68wNs7zRA=
+github.com/bitcoinsv/bsvutil v0.0.0-20181216182056-1d77cf353ea9 h1:hFI8rT84FCA0FFy3cFrkW5Nz4FyNKlIdCvEvvTNySKg=
+github.com/bitcoinsv/bsvutil v0.0.0-20181216182056-1d77cf353ea9/go.mod h1:p44KuNKUH5BC8uX4ONEODaHUR4+ibC8todEAOGQEJAM=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/itchyny/base58-go v0.1.0 h1:zF5spLDo956exUAD17o+7GamZTRkXOZlqJjRciZwd1I=
 github.com/itchyny/base58-go v0.1.0/go.mod h1:SrMWPE3DFuJJp1M/RUhu4fccp/y9AlB8AL3o3duPToU=

privateKey.go

@@ -0,0 +1,23 @@
+package bitcoin
+
+import (
+	"crypto/ecdsa"
+	"math/big"
+
+	"github.com/bitcoinsv/bsvd/bsvec"
+)
+
+func PrivateKey(privKey string) (ecdsaPrivKey *bsvec.PrivateKey) {
+	privKeyBytes := HexDecode(privKey)
+	x, y := bsvec.S256().ScalarBaseMult(privKeyBytes)
+	ecdsaPubKey := ecdsa.PublicKey{
+		Curve: bsvec.S256(),
+		X:     x,
+		Y:     y,
+	}
+	ecdsaPrivKey = &bsvec.PrivateKey{
+		PublicKey: ecdsaPubKey,
+		D:         new(big.Int).SetBytes(privKeyBytes),
+	}
+	return
+}

sign.go

@@ -1,9 +1,7 @@
 package bitcoin
 
 import (
-	"crypto/ecdsa"
 	"encoding/base64"
-	"math/big"
 
 	"github.com/bitcoinsv/bsvd/bsvec"
 	"github.com/bitcoinsv/bsvd/chaincfg/chainhash"
@@ -17,17 +15,7 @@ func SignMessage(privKey string, message string) string {
 	bytes = append(bytes, prefixBytes...)
 	bytes = append(bytes, byte(len(messageBytes)))
 	bytes = append(bytes, messageBytes...)
-	privKeyBytes := HexDecode(privKey)
-	x, y := bsvec.S256().ScalarBaseMult(privKeyBytes)
-	ecdsaPubKey := ecdsa.PublicKey{
-		Curve: bsvec.S256(),
-		X:     x,
-		Y:     y,
-	}
-	ecdsaPrivKey := &bsvec.PrivateKey{
-		PublicKey: ecdsaPubKey,
-		D:         new(big.Int).SetBytes(privKeyBytes),
-	}
+	ecdsaPrivKey := PrivateKey(privKey)
 
 	sigbytes, err := bsvec.SignCompact(bsvec.S256(), ecdsaPrivKey, chainhash.DoubleHashB(bytes), true)
 	if err != nil {