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Add blkmk_get_mdata function for miners which need to build the merkle root themselves

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This commit is contained in:
Luke Dashjr
2014-02-27 17:10:03 +00:00
parent 83daccfeef
commit 847b04d030
2 changed files with 65 additions and 3 deletions
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67
blkmaker.c
View File

@@ -213,7 +213,7 @@ bool build_merkle_root(unsigned char *mrklroot_out, blktemplate_t *tmpl, unsigne
static const int cbScriptSigLen = 4 + 1 + 36;
static
bool _blkmk_append_cb(blktemplate_t *tmpl, void *vout, const void *append, size_t appendsz) {
bool _blkmk_append_cb(blktemplate_t * const tmpl, void * const vout, const void * const append, const size_t appendsz, size_t * const appended_at_offset) {
unsigned char *out = vout;
unsigned char *in = tmpl->cbtxn->data;
size_t insz = tmpl->cbtxn->datasz;
@@ -222,6 +222,8 @@ bool _blkmk_append_cb(blktemplate_t *tmpl, void *vout, const void *append, size_
return false;
int cbPostScriptSig = cbScriptSigLen + 1 + in[cbScriptSigLen];
if (appended_at_offset)
*appended_at_offset = cbPostScriptSig;
unsigned char *outPostScriptSig = &out[cbPostScriptSig];
void *outExtranonce = (void*)outPostScriptSig;
outPostScriptSig += appendsz;
@@ -254,7 +256,7 @@ ssize_t blkmk_append_coinbase_safe(blktemplate_t *tmpl, const void *append, size
return -2;
tmpl->cbtxn->data = newp;
if (!_blkmk_append_cb(tmpl, newp, append, appendsz))
if (!_blkmk_append_cb(tmpl, newp, append, appendsz, NULL))
return -3;
tmpl->cbtxn->datasz += appendsz;
@@ -272,7 +274,7 @@ bool _blkmk_extranonce(blktemplate_t *tmpl, void *vout, unsigned int workid, siz
return true;
}
if (!_blkmk_append_cb(tmpl, vout, &workid, sizeof(workid)))
if (!_blkmk_append_cb(tmpl, vout, &workid, sizeof(workid), NULL))
return false;
*offs += insz + sizeof(workid);
@@ -289,7 +291,17 @@ void blkmk_set_times(blktemplate_t *tmpl, void * const out_hdrbuf, const time_t
timehdr = tmpl->maxtime;
my_htole32(out_hdrbuf, timehdr);
if (out_expire)
{
*out_expire = tmpl->expires - time_passed - 1;
if (can_roll_ntime)
{
// If the caller can roll the time header, we need to expire before reaching the maxtime
int16_t maxtime_expire_limit = (tmpl->maxtime - timehdr) + 1;
if (*out_expire > maxtime_expire_limit)
*out_expire = maxtime_expire_limit;
}
}
}
size_t blkmk_get_data(blktemplate_t *tmpl, void *buf, size_t bufsz, time_t usetime, int16_t *out_expire, unsigned int *out_dataid) {
@@ -320,6 +332,55 @@ size_t blkmk_get_data(blktemplate_t *tmpl, void *buf, size_t bufsz, time_t useti
return 76;
}
bool blkmk_get_mdata(blktemplate_t * const tmpl, void * const buf, const size_t bufsz, const time_t usetime, int16_t * const out_expire, void * const _out_cbtxn, size_t * const out_cbtxnsz, size_t * const cbextranonceoffset, int * const out_branchcount, void * const _out_branches, size_t extranoncesz)
{
if (!(true
&& blkmk_time_left(tmpl, usetime)
&& tmpl->cbtxn
&& blkmk_build_merkle_branches(tmpl)
&& bufsz >= 76
))
return false;
if (extranoncesz == sizeof(unsigned int))
// Avoid overlapping with blkmk_get_data use
++extranoncesz;
void ** const out_branches = _out_branches;
void ** const out_cbtxn = _out_cbtxn;
unsigned char *cbuf = buf;
my_htole32(&cbuf[0], tmpl->version);
memcpy(&cbuf[4], &tmpl->prevblk, 32);
*out_cbtxnsz = tmpl->cbtxn->datasz + extranoncesz;
*out_cbtxn = malloc(*out_cbtxnsz);
if (!*out_cbtxn)
return false;
unsigned char dummy[extranoncesz];
memset(dummy, 0, extranoncesz);
if (!_blkmk_append_cb(tmpl, *out_cbtxn, dummy, extranoncesz, cbextranonceoffset))
{
free(*out_cbtxn);
return false;
}
blkmk_set_times(tmpl, &cbuf[68], usetime, out_expire, true);
memcpy(&cbuf[72], &tmpl->diffbits, 4);
*out_branchcount = tmpl->_mrklbranchcount;
const size_t branches_bytesz = (sizeof(libblkmaker_hash_t) * tmpl->_mrklbranchcount);
*out_branches = malloc(branches_bytesz);
if (!*out_branches)
{
free(*out_cbtxn);
return false;
}
memcpy(*out_branches, tmpl->_mrklbranch, branches_bytesz);
return true;
}
blktime_diff_t blkmk_time_left(const blktemplate_t *tmpl, time_t nowtime) {
double age = difftime(nowtime, tmpl->_time_rcvd);
if (age >= tmpl->expires)

1
blkmaker.h
View File

@@ -18,6 +18,7 @@ extern uint64_t blkmk_init_generation3(blktemplate_t *, const void *script, size
extern ssize_t blkmk_append_coinbase_safe(blktemplate_t *, const void *append, size_t appendsz);
extern bool _blkmk_extranonce(blktemplate_t *tmpl, void *vout, unsigned int workid, size_t *offs);
extern size_t blkmk_get_data(blktemplate_t *, void *buf, size_t bufsz, time_t usetime, int16_t *out_expire, unsigned int *out_dataid);
extern bool blkmk_get_mdata(blktemplate_t *, void *buf, size_t bufsz, time_t usetime, int16_t *out_expire, void *out_cbtxn, size_t *out_cbtxnsz, size_t *cbextranonceoffset, int *out_branchcount, void *out_branches, size_t extranoncesz);
extern blktime_diff_t blkmk_time_left(const blktemplate_t *, time_t nowtime);
extern unsigned long blkmk_work_left(const blktemplate_t *);
#define BLKMK_UNLIMITED_WORK_COUNT ULONG_MAX