Use -ac_name for initial randomx key and ASSETCHAINS_MAGIC for randomx input

src/miner.cpp

@@ -1178,23 +1178,10 @@ void static RandomXMiner()
 
                 char randomxHash[RANDOMX_HASH_SIZE];
                 fprintf(stderr,"RandomXMiner: created randomxHash of size %d\n", RANDOMX_HASH_SIZE);
-                // Initial randomx key is chain magic || ac_name which is >= 2^40 bits of entropy assuming strlen(ac_name) >= 1
-                // For ac_name=DRAGONX we have 4 + 7 = 11 bytes or 2^88 bits of entropy
-                //int randomxKeySize = sizeof(randomxKey); // 4 + strlen(SMART_CHAIN_SYMBOL)];
-                char randomxKey[] = "RANDOMX";
-                //fprintf(stderr,"RandomXMiner: creating randomxKey of size %d\n", randomxKeySize);
-                /*
-                randomxKey[0] = ASSETCHAINS_MAGIC & 0xff;
-                randomxKey[1] = (ASSETCHAINS_MAGIC >> 8) & 0xff;
-                randomxKey[2] = (ASSETCHAINS_MAGIC >> 16) & 0xff;
-                randomxKey[3] = (ASSETCHAINS_MAGIC >> 24) & 0xff;
-                
-                for(int i=0; i++; i<strlen(SMART_CHAIN_SYMBOL) ) {
-                    randomxKey[4+i] = SMART_CHAIN_SYMBOL[i];
-                    fprintf(stderr,"RandomXMiner: added %s to randomxKey\n", SMART_CHAIN_SYMBOL[i]);
-                }
-                fprintf(stderr,"RandomXMiner: created randomxKey=%s\n", randomxKey);
-                */
+                // Initial randomx key is ac_name which is >= 2^40 bits of entropy assuming strlen(ac_name) >= 5
+                // For ac_name=DRAGONX we have 7 bytes or 2^56 bits of entropy
+                char randomxKey[65]; // randomx spec says keysize of >60 bytes is implementation-specific
+                strncpy(randomxKey, SMART_CHAIN_SYMBOL, 65);
 
                 crypto_generichash_blake2b_state state;
                 // Hash = blake2b( key || ac_name)
@@ -1203,8 +1190,11 @@ void static RandomXMiner()
                 //crypto_generichash_blake2b_update(&state, (unsigned char*)&SMART_CHAIN_SYMBOL[0], sizeof(SMART_CHAIN_SYMBOL));
                 //uchar randomxInput[32];
                 //crypto_generichash_blake2b_final(&state, randomxInput, 32);
-                unsigned char randomxInput[] = "RANDOMX";
-                fprintf(stderr,"RandomXMiner: created randomxInput\n");
+                //unsigned char randomxInput[] = "RANDOMX";
+                char randomxInput[80];
+                sprintf(randomxInput, "%08x", ASSETCHAINS_MAGIC);
+
+                fprintf(stderr,"RandomXMiner: created randomxInput=%s\n", randomxInput);
 
                 randomx_flags flags         = randomx_get_flags();
                 randomx_cache *randomxCache = randomx_alloc_cache(flags);
@@ -1237,7 +1227,7 @@ void static RandomXMiner()
                     //crypto_generichash_blake2b_update(&new_state, (unsigned char *)&randomxBlockKey, 32);
                     //crypto_generichash_blake2b_final(&new_state, randomxInput, 32);
 
-                    randomx_init_cache(randomxCache, &randomxBlockKey, sizeof randomxKey);
+                    randomx_init_cache(randomxCache, &randomxBlockKey, sizeof randomxBlockKey);
                     fprintf(stderr,"RandomXMiner: initialized cache with randomxBlockKey=%s\n", randomxBlockKey.ToString().c_str());
                 }
 

test_randomx

@@ -1,6 +1,6 @@
 #!/bin/bash
 
- ./src/hushd -ac_randomx_interval=10 -ac_randomx_lag=3 -ac_halving=20 -ac_algo=randomx -ac_name=RANDOMX3 -ac_private=1 -ac_blocktime=20 -ac_reward=500000000 -ac_supply=55555 -gen=1 -genproclimit=1 -testnode=1
+ ./src/hushd -ac_randomx_interval=10 -ac_randomx_lag=3 -ac_halving=20 -ac_algo=randomx -ac_name=RANDOMX5 -ac_private=1 -ac_blocktime=20 -ac_reward=500000000 -ac_supply=55555 -gen=1 -genproclimit=1 -testnode=1
 
 # to run via the debugger
 # type "run" when gdb prompt appears