From 8865d42ec3fd654121878f8b4057a8b9c80e47f3 Mon Sep 17 00:00:00 2001
From: Ivan Socolsky <jungans@gmail.com>
Date: Thu, 10 Mar 2016 12:32:16 -0300
Subject: [PATCH] improve fee computation for P2PKH wallets

---
 lib/model/txproposal.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/model/txproposal.js b/lib/model/txproposal.js
index f6dd382..2697c4c 100644
--- a/lib/model/txproposal.js
+++ b/lib/model/txproposal.js
@@ -228,7 +228,13 @@ TxProposal.prototype.getRawTx = function() {
 };
 
 TxProposal.prototype.getEstimatedSizeForSingleInput = function() {
-  return this.requiredSignatures * 72 + this.walletN * 36 + 44;
+  switch (this.addressType) {
+    case Constants.SCRIPT_TYPES.P2PKH:
+      return 147;
+    default:
+    case Constants.SCRIPT_TYPES.P2SH:
+      return this.requiredSignatures * 72 + this.walletN * 36 + 44;
+  }
 };
 
 TxProposal.prototype.getEstimatedSize = function() {