moved a lot

internal/crypto/vote.go

@@ -0,0 +1,14 @@
+package crypto
+
+import (
+    "crypto/sha256"
+    "encoding/binary"
+)
+
+func VoteMessage(issueID, optionID int64, nonce []byte) [32]byte {
+	buf := make([]byte, 16+len(nonce))
+	binary.BigEndian.PutUint64(buf[0:8], uint64(issueID))
+	binary.BigEndian.PutUint64(buf[8:16], uint64(optionID))
+	copy(buf[16:], nonce)
+	return sha256.Sum256(buf)
+}