From 31e07203bd98d69be476cbff105ad659b4efa862 Mon Sep 17 00:00:00 2001
From: Jonas Schnelli <dev@jonasschnelli.ch>
Date: Thu, 13 Jul 2017 17:06:27 +0200
Subject: Add wallet endpoint support to bitcoin-cli (-usewallet)

---
 src/bitcoin-cli.cpp | 16 +++++++++++++++-
 src/httpserver.cpp  | 11 +++++++++++
 src/httpserver.h    |  2 ++
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
index 8b48c7f8e4..c2bc15584f 100644
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -46,6 +46,7 @@ std::string HelpMessageCli()
     strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));
     strUsage += HelpMessageOpt("-rpcclienttimeout=<n>", strprintf(_("Timeout in seconds during HTTP requests, or 0 for no timeout. (default: %d)"), DEFAULT_HTTP_CLIENT_TIMEOUT));
     strUsage += HelpMessageOpt("-stdin", _("Read extra arguments from standard input, one per line until EOF/Ctrl-D (recommended for sensitive information such as passphrases)"));
+    strUsage += HelpMessageOpt("-usewallet=<walletname>", _("Send RPC for non-default wallet on RPC server (argument is wallet filename in bitcoind directory, required if bitcoind/-Qt runs with multiple wallets)"));
 
     return strUsage;
 }
@@ -241,7 +242,20 @@ UniValue CallRPC(const std::string& strMethod, const UniValue& params)
     assert(output_buffer);
     evbuffer_add(output_buffer, strRequest.data(), strRequest.size());
 
-    int r = evhttp_make_request(evcon.get(), req.get(), EVHTTP_REQ_POST, "/");
+    // check if we should use a special wallet endpoint
+    std::string endpoint = "/";
+    std::string walletName = GetArg("-usewallet", "");
+    if (!walletName.empty()) {
+        char *encodedURI = evhttp_uriencode(walletName.c_str(), walletName.size(), false);
+        if (encodedURI) {
+            endpoint = "/wallet/"+ std::string(encodedURI);
+            free(encodedURI);
+        }
+        else {
+            throw CConnectionFailed("uri-encode failed");
+        }
+    }
+    int r = evhttp_make_request(evcon.get(), req.get(), EVHTTP_REQ_POST, endpoint.c_str());
     req.release(); // ownership moved to evcon in above call
     if (r != 0) {
         throw CConnectionFailed("send http request failed");
diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index 290a2efca2..ba01255400 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -666,3 +666,14 @@ void UnregisterHTTPHandler(const std::string &prefix, bool exactMatch)
     }
 }
 
+std::string urlDecode(const std::string &urlEncoded) {
+    std::string res;
+    if (!urlEncoded.empty()) {
+        char *decoded = evhttp_uridecode(urlEncoded.c_str(), false, NULL);
+        if (decoded) {
+            res = std::string(decoded);
+            free(decoded);
+        }
+    }
+    return res;
+}
diff --git a/src/httpserver.h b/src/httpserver.h
index 9df56e5fc5..3e434bf0a0 100644
--- a/src/httpserver.h
+++ b/src/httpserver.h
@@ -148,4 +148,6 @@ private:
     struct event* ev;
 };
 
+std::string urlDecode(const std::string &urlEncoded);
+
 #endif // BITCOIN_HTTPSERVER_H
-- 
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