From ffad2cc8f690bffdaed0231a9a737cb200272d15 Mon Sep 17 00:00:00 2001
From: Luk Lu <luk.lu@faronear.org>
Date: Thu, 7 May 2020 16:57:19 +0800
Subject: [PATCH] =?UTF-8?q?fixed:=20big-integer=20=E6=B2=A1=E6=9C=89=20sub?=
 =?UTF-8?q?=20=E6=96=B9=E6=B3=95=EF=BC=8C=E6=94=B9=E6=88=90=20subtract?=
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---
 index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 5b82276..56d86b5 100644
--- a/index.js
+++ b/index.js
@@ -622,7 +622,7 @@ module.exports = {
   distanceSig(hash, sig){ // hash为64hex字符，sig为128hex字符。返回用hex表达的距离。
     if (this.isSignature(sig) && this.isHash(hash)){
       var hashSig=this.hash(sig) // 把签名也转成32字节的哈希，同样长度方便比较
-      return new BigInt(hash,16).sub(new BigInt(hashSig,16)).abs().toString(16)
+      return new BigInt(hash,16).subtract(new BigInt(hashSig,16)).abs().toString(16)
     }
     return null
   }