Use double precision for pool difficulty

src/mining.cpp

@@ -111,7 +111,7 @@ void runStratumWorker(void *name) {
 
   // connect to pool
   
-  float currentPoolDifficulty = atof(DEFAULT_DIFFICULTY);
+  double currentPoolDifficulty = DEFAULT_DIFFICULTY;
 
   while(true) {
       

src/mining.h

@@ -5,7 +5,7 @@
 // Mining
 #define MAX_NONCE       5000000U
 #define TARGET_NONCE    471136297U
-#define DEFAULT_DIFFICULTY  "1e-9"
+#define DEFAULT_DIFFICULTY  1e-9
 #define KEEPALIVE_TIME_ms       30000
 #define POOLINACTIVITY_TIME_ms  60000
 
@@ -21,7 +21,7 @@ typedef struct{
   uint8_t bytearray_pooltarget[32];
   uint8_t merkle_result[32];
   uint8_t bytearray_blockheader[80];
-  float poolDifficulty;
+  double poolDifficulty;
   bool inRun;
   bool newJob;
   bool newJob2;

src/stratum.cpp

@@ -216,7 +216,7 @@ bool tx_mining_submit(WiFiClient& client, mining_subscribe mWorker, mining_job m
     return true;
 }
 
-bool parse_mining_set_difficulty(String line, float& difficulty)
+bool parse_mining_set_difficulty(String line, double& difficulty)
 {
     Serial.println("    Parsing Method [SET DIFFICULTY]");
     if(!verifyPayload(&line)) return false;
@@ -226,8 +226,8 @@ bool parse_mining_set_difficulty(String line, float& difficulty)
     if (error) return false;
     if (!doc.containsKey("params")) return false;
 
-    Serial.print("    difficulty: "); Serial.println((float)doc["params"][0],12);
-    difficulty = (float)doc["params"][0];
+    Serial.print("    difficulty: "); Serial.println((double)doc["params"][0],12);
+    difficulty = (double)doc["params"][0];
 
     #ifdef DEBUG_MINING
     Serial.print("    job_id: "); Serial.println(job_id);
@@ -236,12 +236,12 @@ bool parse_mining_set_difficulty(String line, float& difficulty)
     return true;
 }
 
-bool tx_suggest_difficulty(WiFiClient& client, const char * difficulty)
+bool tx_suggest_difficulty(WiFiClient& client, double difficulty)
 {
     char payload[BUFFER] = {0};
 
     id = getNextId(id);
-    sprintf(payload, "{\"id\": %d, \"method\": \"mining.suggest_difficulty\", \"params\": [%s]}\n", id, difficulty);
+    sprintf(payload, "{\"id\": %d, \"method\": \"mining.suggest_difficulty\", \"params\": [%.10g]}\n", id, difficulty);
     
     Serial.print("  Sending  : "); Serial.print(payload);
     return client.print(payload);

src/stratum.h

@@ -62,8 +62,8 @@ bool parse_mining_notify(String line, mining_job& mJob);
 bool tx_mining_submit(WiFiClient& client, mining_subscribe mWorker, mining_job mJob, unsigned long nonce);
 
 //Difficulty Methods 
-bool tx_suggest_difficulty(WiFiClient& client, const char * difficulty);
-bool parse_mining_set_difficulty(String line, float& difficulty);
+bool tx_suggest_difficulty(WiFiClient& client, double difficulty);
+bool parse_mining_set_difficulty(String line, double& difficulty);
 
 
 #endif // STRATUM_API_H

src/utils.cpp

@@ -155,7 +155,7 @@ miner_data init_miner_data(void){
   
   miner_data newMinerData;
 
-  newMinerData.poolDifficulty = atof(DEFAULT_DIFFICULTY);
+  newMinerData.poolDifficulty = DEFAULT_DIFFICULTY;
   newMinerData.inRun = false;
   newMinerData.newJob = false;