README.md

@@ -21,7 +21,6 @@ Usage:
 	hashcash new [subject *] [expires in 5m] [difficulty 10]
 	hashcash parse <hashcash>
 	hashcash solve <hashcash>
-	hashcash hash <hashcash>
 	hashcash verify <hashcash> [subject *]
 ```
 

cmd/hashcash/hashcash.go

@@ -1,8 +1,6 @@
 package main
 
 import (
-	"crypto/sha256"
-	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"os"
@@ -17,7 +15,6 @@ func help() {
 	fmt.Println("\thashcash new [subject *] [difficulty 10] [expires in 5m]")
 	fmt.Println("\thashcash parse <hashcash>")
 	fmt.Println("\thashcash solve <hashcash>")
-	fmt.Println("\thashcash hash <hashcash>")
 	fmt.Println("\thashcash verify <hashcash> [subject *]")
 }
 
@@ -110,17 +107,6 @@ func main() {
 
 		fmt.Println(h.String())
 		return
-	case "hash":
-		var token string
-		if 3 != nargs {
-			help()
-			os.Exit(1)
-			return
-		}
-		token = args[2]
-		hash := sha256.Sum256([]byte(token))
-		fmt.Println(hex.EncodeToString(hash[:]))
-		return
 	case "verify":
 		var token string
 		if nargs < 3 {

hashcash.go

@@ -216,10 +216,6 @@ func (h *Hashcash) Verify(subject string) error {
 }
 
 func verifyBits(hash []byte, bits, n int) bool {
-	if 0 == bits {
-		return true
-	}
-
 	for i := 0; i < n; i++ {
 		if bits > 8 {
 			bits -= 8
@@ -231,12 +227,15 @@ func verifyBits(hash []byte, bits, n int) bool {
 
 		// (bits % 8) == bits
 		pad := 8 - bits
-		if 0 == hash[i]>>pad {
+		if 0 != hash[i]>>pad {
-			return true
+			return false
-		}
 		}
 
-	return false
+		return true
+	}
+
+	// 0 == bits
+	return true
 }
 
 // Solve will search for a solution, returning an error if the difficulty is