From f2c6d310aeb4d6b6ed92ea1ec2988d6fe58ff2d7 Mon Sep 17 00:00:00 2001
From: Chris Kleeschulte <chrisk@bitpay.com>
Date: Tue, 11 Aug 2015 12:31:54 -0400
Subject: [PATCH] GetProgress

- uses the same routine as the log reporter in bitcoin
- essentially divides the chainParams checkpoints by the current tip
---
 src/libbitcoind.cc | 13 +++++++++++++
 src/libbitcoind.h  |  1 +
 2 files changed, 14 insertions(+)

diff --git a/src/libbitcoind.cc b/src/libbitcoind.cc
index 6aaec133..f2e6befd 100644
--- a/src/libbitcoind.cc
+++ b/src/libbitcoind.cc
@@ -216,6 +216,18 @@ NAN_METHOD(VerifyScript) {
 static bool
 set_cooked(void);
 
+/**
+ * GetProgress()
+ * bitcoind.getProgress()
+ * provides a float value >= indicating the progress of the blockchain sync
+ */
+NAN_METHOD(GetProgress) {
+  const CChainParams& chainParams = Params();
+  float progress = 0;
+  progress = Checkpoints::GuessVerificationProgress(chainParams.Checkpoints(), chainActive.Tip());
+  NanReturnValue(progress);
+};
+
 NAN_METHOD(StartTxMon) {
   Isolate* isolate = Isolate::GetCurrent();
   HandleScope scope(isolate);
@@ -1670,6 +1682,7 @@ init(Handle<Object> target) {
   NODE_SET_METHOD(target, "sendTransaction", SendTransaction);
   NODE_SET_METHOD(target, "estimateFee", EstimateFee);
   NODE_SET_METHOD(target, "startTxMon", StartTxMon);
+  NODE_SET_METHOD(target, "getProgress", GetProgress);
 
 }
 
diff --git a/src/libbitcoind.h b/src/libbitcoind.h
index 307f5968..8bd4836d 100644
--- a/src/libbitcoind.h
+++ b/src/libbitcoind.h
@@ -31,3 +31,4 @@ NAN_METHOD(VerifyScript);
 NAN_METHOD(SendTransaction);
 NAN_METHOD(EstimateFee);
 NAN_METHOD(StartTxMon);
+NAN_METHOD(GetProgress);