From 1e095d487d4d193b98c1fdf8bc1408b0c6753cce Mon Sep 17 00:00:00 2001
From: junderw <junderwood@bitcoinbank.co.jp>
Date: Tue, 22 May 2018 18:51:21 +0900
Subject: [PATCH] restore typeforce with Buffer hash instead of Function
 getHash

---
 src/block.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/block.js b/src/block.js
index 33a2cb9..710262f 100644
--- a/src/block.js
+++ b/src/block.js
@@ -1,8 +1,8 @@
 var Buffer = require('safe-buffer').Buffer
 var bcrypto = require('./crypto')
 var fastMerkleRoot = require('merkle-lib/fastRoot')
-// var typeforce = require('typeforce')
-// var types = require('./types')
+var typeforce = require('typeforce')
+var types = require('./types')
 var varuint = require('varuint-bitcoin')
 
 var Transaction = require('./transaction')
@@ -150,7 +150,7 @@ Block.calculateTarget = function (bits) {
 }
 
 Block.calculateMerkleRoot = function (transactions) {
-  // typeforce([{ getHash: types.Function }], transactions) ToDo: What should this be?
+  typeforce([{ hash: types.Buffer }], transactions)
   if (transactions.length === 0) throw TypeError('Cannot compute merkle root for zero transactions')
 
   var hashes = transactions.map(function (transaction) {