From 8c7f2724ffcdf595f1f2f75d3cb820e42d44ce7a Mon Sep 17 00:00:00 2001
From: g-homebase <gabidi@gmail.com>
Date: Tue, 3 Sep 2019 17:31:34 -0400
Subject: [PATCH] Added getblockhash call

---
 api_auth_docker/api-sample.properties     |  1 +
 doc/API.v0.md                             | 18 +++++++++++++
 doc/openapi/v0/cyphernode-api.yaml        | 32 +++++++++++++++++++++++
 proxy_docker/app/script/blockchainrpc.sh  |  7 +++++
 proxy_docker/app/script/requesthandler.sh |  7 +++++
 5 files changed, 65 insertions(+)

diff --git a/api_auth_docker/api-sample.properties b/api_auth_docker/api-sample.properties
index 12dfd37..4d59d81 100644
--- a/api_auth_docker/api-sample.properties
+++ b/api_auth_docker/api-sample.properties
@@ -5,6 +5,7 @@ action_helloworld=stats
 action_getblockchaininfo=stats
 action_installation_info=stats
 action_getmempoolinfo=stats
+action_getblockhash=stats
 
 # Watcher can do what the stats can do, plus:
 action_watch=watcher
diff --git a/doc/API.v0.md b/doc/API.v0.md
index 619f893..d62a1a2 100644
--- a/doc/API.v0.md
+++ b/doc/API.v0.md
@@ -376,6 +376,24 @@ Proxy response:
 }
 ```
 
+### Get the Block Hash from Height (called by application)
+
+Returns the best block hash matching height provided.
+
+```http
+GET http://cyphernode:8888/getblockhash/593104
+```
+
+Proxy response:
+
+```json
+{
+  "result":"00000000000000000005dc459f0575b17413dbe7685e3e0fd382ed521f1be68b",
+  "error":null,
+  "id":null
+}
+```
+
 ### Get the Best Block Hash (called by application)
 
 Returns the best block hash of the watching Bitcoin node.
diff --git a/doc/openapi/v0/cyphernode-api.yaml b/doc/openapi/v0/cyphernode-api.yaml
index 46e6e81..b1c2415 100644
--- a/doc/openapi/v0/cyphernode-api.yaml
+++ b/doc/openapi/v0/cyphernode-api.yaml
@@ -436,6 +436,38 @@ paths:
               schema:
                 $ref: '#/components/schemas/ApiResponseTemporarilyUnavailable'
 
+  /getblockhash:
+    get:
+      tags:
+        - "block"
+        - "core features"
+      summary: "Get block hash matching height provided."
+      description: "Returns the block matching the height provided of the watching Bitcoin node."
+      operationId: "getBlockHash"
+      responses:
+        '200':
+          description: "successful operation"
+          content:
+            application/json:
+              schema:
+                type: "object"
+                required:
+                  - "result"
+                properties:
+                  result:
+                    $ref: '#/components/schemas/TypeHashString'
+                  error:
+                    type: "string"
+                  id:
+                    type: "string"
+        '403':
+          $ref: '#/components/schemas/ApiResponseNotAllowed'
+        '503':
+          description: "Resource temporarily unavailable"
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ApiResponseTemporarilyUnavailable'
   /getbestblockhash:
     get:
       tags:
diff --git a/proxy_docker/app/script/blockchainrpc.sh b/proxy_docker/app/script/blockchainrpc.sh
index 89bcca7..661d91f 100644
--- a/proxy_docker/app/script/blockchainrpc.sh
+++ b/proxy_docker/app/script/blockchainrpc.sh
@@ -84,3 +84,10 @@ get_mempool_info() {
   send_to_watcher_node "${data}" | jq ".result"
   return $?
 }
+get_blockhash() {
+  trace "Entering get_blockhash()..."
+  local blockheight=${1}
+  local data="{\"method\":\"getblockhash\",\"params\":[${blockheight}]}"
+  send_to_watcher_node "${data}" | jq ".result"
+  return $?
+}
diff --git a/proxy_docker/app/script/requesthandler.sh b/proxy_docker/app/script/requesthandler.sh
index 5bf6771..dad4ca2 100644
--- a/proxy_docker/app/script/requesthandler.sh
+++ b/proxy_docker/app/script/requesthandler.sh
@@ -182,6 +182,13 @@ main() {
           response_to_client "${response}" ${?}
           break
           ;;
+        getblockhash)
+          # curl (GET) http://192.168.111.152:8080/getblockhash/522322
+
+          response=$(get_blockhash $(echo "${line}" | cut -d ' ' -f2 | cut -d '/' -f3))
+          response_to_client "${response}" ${?}
+          break
+          ;;
         getblockinfo)
           # curl (GET) http://192.168.111.152:8080/getblockinfo/000000006f82a384c208ecfa04d05beea02d420f3f398ddda5c7f900de5718ea