Added basic examples

examples/sign_message/sign_message.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"log"
+
+	"github.com/bitcoinschema/go-bitcoin"
+)
+
+func main() {
+	// Create a private key for the example
+	privateKey, err := bitcoin.CreatePrivateKeyString()
+	if err != nil {
+		log.Fatalf("error occurred: %s", err.Error())
+	}
+
+	// Sign the message (returning a signature)
+	var signature string
+	if signature, err = bitcoin.SignMessage(privateKey, "This is the example message"); err != nil {
+		log.Fatalf("error occurred: %s", err.Error())
+	}
+
+	// Final signature for the given message
+	log.Printf("private key: %s signature: %s", privateKey, signature)
+}

examples/verify_signature/verify_signature.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"log"
+
+	"github.com/bitcoinschema/go-bitcoin"
+)
+
+func main() {
+
+	// Example values (from sign_message.go)
+	privateKey := "ac40784f09304a88b8db0cfcaff3a4e7d81b6b6ccdef68fad8ddf853ea1d1dce"
+	signature := "H/sEz5QDQYkXCox9shPB4MMVAVUM/JzfbPHNpPRwNl+hMI2gxy3x7xs9Ed5ryuny5s2hY4Qxc5uirqjMyEEON6k="
+	message := "This is the example message"
+
+	// Get an address from private key
+	address, err := bitcoin.AddressFromPrivateKey(privateKey)
+	if err != nil {
+		log.Fatalf("error occurred: %s", err.Error())
+	}
+
+	// Verify the signature
+	if err = bitcoin.VerifyMessage(address, signature, message); err != nil {
+		log.Fatalf("verify failed: %s", err.Error())
+	} else {
+		log.Println("verification successful!")
+	}
+}