Add config option to prioritise more clients than supporting clients with high hashrates

ckproxy.conf

@@ -19,6 +19,7 @@
 "mindiff" : 1,
 "startdiff" : 42,
 "maxdiff" : 0,
+"clientsvspeed" : false,
 "logdir" : "logs"
 }
 Comments from here on are ignored.

src/ckpool.c

@@ -1174,6 +1174,7 @@ static void parse_config(ckpool_t *ckp)
 		if (arr_size)
 			parse_proxies(ckp, arr_val, arr_size);
 	}
+	json_get_bool(&ckp->clientsvspeed, json_conf, "clientsvspeed");
 	json_decref(json_conf);
 }
 

src/ckpool.h

@@ -139,6 +139,9 @@ struct ckpool_instance {
 	/* Are we running as a proxy */
 	bool proxy;
 
+	/* Do we prefer more proxy clients over support for >5TH clients */
+	bool clientsvspeed;
+
 	/* Are we running without ckdb */
 	bool standalone;
 

src/stratifier.c

@@ -986,15 +986,27 @@ static void update_subscribe(ckpool_t *ckp)
 	sdata->proxy_base.enonce1constlen = strlen(sdata->proxy_base.enonce1) / 2;
 	hex2bin(sdata->proxy_base.enonce1bin, sdata->proxy_base.enonce1, sdata->proxy_base.enonce1constlen);
 	sdata->proxy_base.nonce2len = json_integer_value(json_object_get(val, "nonce2len"));
+	if (ckp->clientsvspeed) {
+		if (sdata->proxy_base.nonce2len > 5)
+			sdata->proxy_base.enonce1varlen = 4;
+		else if (sdata->proxy_base.nonce2len > 3)
+			sdata->proxy_base.enonce1varlen = 2;
+		else
+			sdata->proxy_base.enonce1varlen = 1;
+	} else {
 		if (sdata->proxy_base.nonce2len > 7)
 			sdata->proxy_base.enonce1varlen = 4;
 		else if (sdata->proxy_base.nonce2len > 5)
 			sdata->proxy_base.enonce1varlen = 2;
 		else
 			sdata->proxy_base.enonce1varlen = 1;
+	}
 	sdata->proxy_base.enonce2varlen = sdata->proxy_base.nonce2len - sdata->proxy_base.enonce1varlen;
 	ck_wunlock(&sdata->workbase_lock);
 
+	LOGNOTICE("Upstream pool extranonce2 length %d, max proxy clients %lld",
+		  sdata->proxy_base.nonce2len, 1ll << (sdata->proxy_base.enonce1varlen * 8));
+
 	json_decref(val);
 	drop_allclients(ckp);
 }