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139 lines
4 KiB
C++
139 lines
4 KiB
C++
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// http://www.righto.com/2014/02/bitcoin-mining-hard-way-algorithms.html
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// https://en.bitcoin.it/wiki/Merged_mining_specification#Merged_mining_coinbase
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#include "stratum.h"
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#define TX_VALUE(v, s) ((unsigned int)(v>>s)&0xff)
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static void encode_tx_value(char *encoded, json_int_t value)
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{
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sprintf(encoded, "%02x%02x%02x%02x%02x%02x%02x%02x",
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TX_VALUE(value, 0), TX_VALUE(value, 8), TX_VALUE(value, 16), TX_VALUE(value, 24),
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TX_VALUE(value, 32), TX_VALUE(value, 40), TX_VALUE(value, 48), TX_VALUE(value, 56));
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}
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static void job_pack_tx(YAAMP_COIND *coind, char *data, json_int_t amount, char *key)
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{
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int ol = strlen(data);
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char evalue[64];
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encode_tx_value(evalue, amount);
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sprintf(data+strlen(data), "%s", evalue);
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if(coind->pos && !key)
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sprintf(data+strlen(data), "2321%sac", coind->pubkey);
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else
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sprintf(data+strlen(data), "1976a914%s88ac", key? key: coind->script_pubkey);
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// debuglog("pack tx %s\n", data+ol);
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// debuglog("pack tx %lld\n", amount);
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}
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void coinbase_aux(YAAMP_JOB_TEMPLATE *templ, char *aux_script)
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{
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vector<string> hashlist = coind_aux_hashlist(templ->auxs, templ->auxs_size);
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while(hashlist.size() > 1)
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{
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vector<string> l;
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for(int i = 0; i < hashlist.size()/2; i++)
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{
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string s = hashlist[i*2] + hashlist[i*2+1];
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char bin[YAAMP_HASHLEN_BIN*2];
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char out[YAAMP_HASHLEN_STR];
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binlify((unsigned char *)bin, s.c_str());
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sha256_double_hash_hex(bin, out, YAAMP_HASHLEN_BIN*2);
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l.push_back(out);
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}
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hashlist = l;
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}
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char merkle_hash[4*1024];
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memset(merkle_hash, 0, 4*1024);
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string_be(hashlist[0].c_str(), merkle_hash);
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sprintf(aux_script+strlen(aux_script), "fabe6d6d%s%02x00000000000000", merkle_hash, templ->auxs_size);
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// debuglog("aux_script is %s\n", aux_script);
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}
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void coinbase_create(YAAMP_COIND *coind, YAAMP_JOB_TEMPLATE *templ, json_value *json_result)
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{
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char eheight[64];
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ser_number(templ->height, eheight);
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char etime[64];
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ser_number(time(NULL), etime);
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char entime[64];
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memset(entime, 0, 64);
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if(coind->pos)
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ser_string_be(templ->ntime, entime, 1);
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char eversion1[64] = "01000000";
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if(coind->txmessage)
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strcpy(eversion1, "02000000");
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char script1[4*1024];
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sprintf(script1, "%s%s%s08", eheight, templ->flags, etime);
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char script2[4*1024] = "7961616d702e636f6d00"; // yaamp.com
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if(!coind->pos && !coind->isaux && templ->auxs_size)
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coinbase_aux(templ, script2);
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int script_len = strlen(script1)/2 + strlen(script2)/2 + 8;
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sprintf(templ->coinb1,
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"%s%s010000000000000000000000000000000000000000000000000000000000000000ffffffff%02x%s", // 8+8+74+2 -> height
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eversion1, entime, script_len, script1);
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sprintf(templ->coinb2, "%s00000000", script2);
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json_int_t available = templ->value;
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if(strcmp(coind->symbol, "DRK") == 0 || strcmp(coind->symbol, "DASH") == 0)
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// if(strcmp(coind->symbol, "DRK") == 0)
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{
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char charity_payee[1024] = "";
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strcpy(charity_payee, json_get_string(json_result, "payee"));
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json_int_t charity_amount = json_get_int(json_result, "payee_amount");
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bool charity_payments = json_get_bool(json_result, "masternode_payments");
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bool charity_enforce = json_get_bool(json_result, "enforce_masternode_payments");
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if(charity_payments && charity_enforce)
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{
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strcat(templ->coinb2, "02");
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available -= charity_amount;
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char script_payee[1024];
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base58_decode(charity_payee, script_payee);
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job_pack_tx(coind, templ->coinb2, charity_amount, script_payee);
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}
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else
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strcat(templ->coinb2, "01");
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}
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else
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strcat(templ->coinb2, "01");
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job_pack_tx(coind, templ->coinb2, available, NULL);
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strcat(templ->coinb2, "00000000"); // locktime
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coind->reward = (double)available/100000000*coind->reward_mul;
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// debuglog("coinbase %f\n", coind->reward);
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// debuglog("new job: %x, %s, %s, %s\n", coind->templ->id, coind->templ->version, coind->templ->nbits, coind->templ->ntime);
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// debuglog("coinb1 %s\n", templ->coinb1);
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// debuglog("coinb2 %s\n", templ->coinb2);
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}
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