API - Add last share difficulty for devices and pool

API-README

@@ -392,13 +392,15 @@ Added API commands:
 
 Modified API commands:
  Change pool field name 'Diff1 Shares' to 'Diff1 Work'
- 'devs' - add 'Diff1 Work', 'Difficulty Accepted', 'Difficulty Rejected'
-          to all devices
- 'gpu|N' - add 'Diff1 Work', 'Difficulty Accepted', 'Difficulty Rejected'
- 'pga|N' - add 'Diff1 Work', 'Difficulty Accepted', 'Difficulty Rejected'
+ 'devs' - add 'Diff1 Work', 'Difficulty Accepted', 'Difficulty Rejected',
+              'Last Share Difficulty' to all devices
+ 'gpu|N' - add 'Diff1 Work', 'Difficulty Accepted',
+              'Difficulty Rejected', 'Last Share Difficulty'
+ 'pga|N' - add 'Diff1 Work', 'Difficulty Accepted',
+              'Difficulty Rejected', 'Last Share Difficulty'
  'notify' - add '*Dev Throttle' (for BFL Singles)
- 'pools' - add 'Proxy Type', 'Proxy', 'Difficulty Accepted',
-               'Difficulty Rejected', 'Difficulty Stale'
+ 'pools' - add 'Proxy Type', 'Proxy', 'Difficulty Accepted', 'Difficulty Rejected',
+               'Difficulty Stale', 'Last Share Difficulty'
  'config' - add 'Queue', 'Expiry'
 
 ----------

api.c

@@ -1387,6 +1387,7 @@ static void gpustatus(int gpu, bool isjson)
 		root = api_add_int(root, "Diff1 Work", &(cgpu->diff1), false);
 		root = api_add_diff(root, "Difficulty Accepted", &(cgpu->diff_accepted), false);
 		root = api_add_diff(root, "Difficulty Rejected", &(cgpu->diff_rejected), false);
+		root = api_add_diff(root, "Last Share Difficulty", &(cgpu->last_share_diff), false);
 
 		root = print_data(root, buf, isjson);
 		strcat(io_buffer, buf);
@@ -1473,6 +1474,7 @@ static void pgastatus(int pga, bool isjson)
 		root = api_add_int(root, "Diff1 Work", &(cgpu->diff1), false);
 		root = api_add_diff(root, "Difficulty Accepted", &(cgpu->diff_accepted), false);
 		root = api_add_diff(root, "Difficulty Rejected", &(cgpu->diff_rejected), false);
+		root = api_add_diff(root, "Last Share Difficulty", &(cgpu->last_share_diff), false);
 
 		root = print_data(root, buf, isjson);
 		strcat(io_buffer, buf);
@@ -1508,6 +1510,7 @@ static void cpustatus(int cpu, bool isjson)
 		root = api_add_int(root, "Diff1 Work", &(cgpu->diff1), false);
 		root = api_add_diff(root, "Difficulty Accepted", &(cgpu->diff_accepted), false);
 		root = api_add_diff(root, "Difficulty Rejected", &(cgpu->diff_rejected), false);
+		root = api_add_diff(root, "Last Share Difficulty", &(cgpu->last_share_diff), false);
 
 		root = print_data(root, buf, isjson);
 		strcat(io_buffer, buf);
@@ -1890,6 +1893,7 @@ static void poolstatus(__maybe_unused SOCKETTYPE c, __maybe_unused char *param,
 		root = api_add_diff(root, "Difficulty Accepted", &(pool->diff_accepted), false);
 		root = api_add_diff(root, "Difficulty Rejected", &(pool->diff_rejected), false);
 		root = api_add_diff(root, "Difficulty Stale", &(pool->diff_stale), false);
+		root = api_add_diff(root, "Last Share Difficulty", &(pool->last_share_diff), false);
 
 		if (isjson && (i > 0))
 			strcat(io_buffer, COMMA);

cgminer.c

@@ -1877,7 +1877,9 @@ static bool submit_upstream_work(const struct work *work, CURL *curl, bool resub
 		pool->seq_rejects = 0;
 		cgpu->last_share_pool = pool->pool_no;
 		cgpu->last_share_pool_time = time(NULL);
+		cgpu->last_share_diff = work->work_difficulty;
 		pool->last_share_time = cgpu->last_share_pool_time;
+		pool->last_share_diff = work->work_difficulty;
 		applog(LOG_DEBUG, "PROOF OF WORK RESULT: true (yay!!!)");
 		if (!QUIET) {
 			if (total_pools > 1)

miner.h

@@ -405,6 +405,7 @@ struct cgpu_info {
 	double diff_rejected;
 	int last_share_pool;
 	time_t last_share_pool_time;
+	double last_share_diff;
 
 	time_t device_last_well;
 	time_t device_last_not_well;
@@ -800,6 +801,7 @@ struct pool {
 	struct list_head curlring;
 
 	time_t last_share_time;
+	double last_share_diff;
 
 	struct cgminer_stats cgminer_stats;
 	struct cgminer_pool_stats cgminer_pool_stats;