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Create a store of the transactions with GBT in the minimum size form required to generate work items with a varied coinbase.

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This commit is contained in:
Con Kolivas 2012-11-03 13:27:41 +11:00
parent 4a72a1574f
commit 8d0f748246
2 changed files with 59 additions and 1 deletions
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56
cgminer.c
View File

@ -1378,6 +1378,61 @@ static void __build_gbt_coinbase(struct pool *pool)
pool->gbt_coinbase = coinbase;
}
static void gen_hash(unsigned char *data, unsigned char *hash, int len);
/* Process transactions with GBT by storing the binary value of the first
* transaction, and the hashes of the remaining transactions since these
* remain constant with an altered coinbase when generating work. Must be
* entered under gbt_lock */
static bool __build_gbt_txns(struct pool *pool, json_t *res_val)
{
json_t *txn_array;
const char *txn0;
bool ret = false;
int i;
free(pool->txn0);
pool->txn0 = NULL;
free(pool->txn_hashes);
pool->txn_hashes = NULL;
pool->gbt_txns = 0;
txn_array = json_object_get(res_val, "transactions");
if (!json_is_array(txn_array))
goto out;
ret = true;
pool->gbt_txns = json_array_size(txn_array);
if (!pool->gbt_txns)
goto out;
txn0 = json_string_value(json_object_get(json_array_get(txn_array, 0), "data"));
if (!hex2bin(pool->txn0, txn0, strlen(txn0) / 2))
quit(1, "Failed to hex2bin txn0");
pool->txn_hashes = calloc(32 * pool->gbt_txns, 1);
if (unlikely(!pool->txn_hashes))
quit(1, "Failed to calloc txn_hashes in __build_gbt_txns");
for (i = 1; i < pool->gbt_txns; i++) {
json_t *txn_val = json_object_get(json_array_get(txn_array, i), "data");
const char *txn = json_string_value(txn_val);
int txn_len = strlen(txn), binlen;
unsigned char *txn_bin;
binlen = txn_len % 4 ? txn_len + 4 - (txn_len % 4) : txn_len;
txn_bin = calloc(binlen, 1);
if (unlikely(!txn_bin))
quit(1, "Failed to calloc txn_bin in __build_gbt_txns");
if (unlikely(!hex2bin(txn_bin, txn, txn_len / 2)))
quit(1, "Failed to hex2bin txn_bin");
gen_hash(txn_bin, pool->txn_hashes + (32 * (i - 1)), txn_len);
free(txn_bin);
}
out:
return ret;
}
static bool gbt_decode(struct pool *pool, json_t *res_val)
{
const char *previousblockhash;
@ -1432,6 +1487,7 @@ static bool gbt_decode(struct pool *pool, json_t *res_val)
pool->gbt_submitold = submitold;
pool->gbt_bits = strdup(bits);
__build_gbt_coinbase(pool);
__build_gbt_txns(pool, res_val);
mutex_unlock(&pool->gbt_lock);
return true;

4
miner.h
View File

@ -897,7 +897,9 @@ struct pool {
bool gbt_submitold;
char *gbt_bits;
unsigned char *gbt_coinbase;
unsigned char *txn0;
unsigned char *txn_hashes;
int gbt_txns;
};
#define GETWORK_MODE_TESTPOOL 'T'