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decred: last vote bit should not be changed

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This commit is contained in:
Tanguy Pruvot 2016-04-16 00:57:53 +02:00
parent fbd30f784c
commit 838f108dd4
1 changed files with 8 additions and 2 deletions
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10
ccminer.cpp
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@ -659,7 +659,10 @@ static bool work_decode(const json_t *val, struct work *work)
cbin2hex(work->job_id, (const char*)&work->data[17], 4);
if (opt_algo == ALGO_DECRED) {
uint16_t vote = (opt_vote << 1) | 1;
uint16_t vote;
// always keep last bit of votebits
memcpy(&vote, &work->data[25], 2);
vote = (opt_vote << 1) | (vote & 1);
memcpy(&work->data[25], &vote, 2);
// some random extradata to make it unique
work->data[36] = (rand()*4);
@ -1395,11 +1398,14 @@ static bool stratum_gen_work(struct stratum_ctx *sctx, struct work *work)
work->data[1 + i] = le32dec((uint32_t *)sctx->job.prevhash + i);
if (opt_algo == ALGO_DECRED) {
uint16_t vote = (opt_vote << 1) | 1;
uint16_t vote;
for (i = 0; i < 8; i++) // reversed prevhash
work->data[1 + i] = swab32(work->data[1 + i]);
// decred header (coinb1) [merkle...nonce]
memcpy(&work->data[9], sctx->job.coinbase, 108);
// last vote bit should never be changed
memcpy(&vote, &work->data[25], 2);
vote = (opt_vote << 1) | (vote & 1);
memcpy(&work->data[25], &vote, 2);
// extradata
if (sctx->xnonce1_size > sizeof(work->data)-(36*4)) {