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chaintopology: track three different feerates.

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Depending on what we're doing, we can want different ones.  So use
IMMEDIATE (estimatesmartfee 2 CONSERVATIVE), NORMAL (estimatesmartfee
4 ECONOMICAL) and SLOW (estimatesmartfee 100 ECONOMICAL).

If one isn't available, we try making each one half the previous.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2017-11-21 14:00:29 +10:30
committed by Christian Decker
parent ef4d54df94
commit 7151c65535
5 changed files with 166 additions and 48 deletions
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67
lightningd/bitcoind.c
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@@ -259,30 +259,73 @@ static bool extract_feerate(struct bitcoin_cli *bcli,
return json_tok_double(output, feeratetok, feerate);
}
struct estimatefee {
size_t i;
const u32 *blocks;
const char **estmode;
void (*cb)(struct bitcoind *bitcoind, const u64 satoshi_per_kw[],
void *);
void *arg;
u64 *satoshi_per_kw;
};
static void do_one_estimatefee(struct bitcoind *bitcoind,
struct estimatefee *efee);
static void process_estimatefee(struct bitcoin_cli *bcli)
{
double feerate;
u64 satoshi_per_kw;
void (*cb)(struct bitcoind *, u64, void *) = bcli->cb;
struct estimatefee *efee = bcli->cb_arg;
/* FIXME: We could trawl recent blocks for median fee... */
if (!extract_feerate(bcli, bcli->output, bcli->output_bytes, &feerate)) {
log_unusual(bcli->bitcoind->log, "Unable to estimate fee");
satoshi_per_kw = 0;
log_unusual(bcli->bitcoind->log, "Unable to estimate %s/%u fee",
efee->estmode[efee->i], efee->blocks[efee->i]);
efee->satoshi_per_kw[efee->i] = 0;
} else
/* Rate in satoshi per kw. */
satoshi_per_kw = feerate * 100000000 / 4;
efee->satoshi_per_kw[efee->i] = feerate * 100000000 / 4;
cb(bcli->bitcoind, satoshi_per_kw, bcli->cb_arg);
efee->i++;
if (efee->i == tal_count(efee->satoshi_per_kw)) {
efee->cb(bcli->bitcoind, efee->satoshi_per_kw, efee->arg);
tal_free(efee);
} else {
/* Next */
do_one_estimatefee(bcli->bitcoind, efee);
}
}
void bitcoind_estimate_fee_(struct bitcoind *bitcoind,
void (*cb)(struct bitcoind *bitcoind,
u64, void *),
void *arg)
static void do_one_estimatefee(struct bitcoind *bitcoind,
struct estimatefee *efee)
{
start_bitcoin_cli(bitcoind, NULL, process_estimatefee, false, cb, arg,
"estimatesmartfee", "2", "CONSERVATIVE", NULL);
char blockstr[STR_MAX_CHARS(u32)];
sprintf(blockstr, "%u", efee->blocks[efee->i]);
start_bitcoin_cli(bitcoind, NULL, process_estimatefee, false, NULL, efee,
"estimatesmartfee", blockstr, efee->estmode[efee->i],
NULL);
}
void bitcoind_estimate_fees_(struct bitcoind *bitcoind,
const u32 blocks[], const char *estmode[],
size_t num_estimates,
void (*cb)(struct bitcoind *bitcoind,
const u64 satoshi_per_kw[], void *),
void *arg)
{
struct estimatefee *efee = tal(bitcoind, struct estimatefee);
efee->i = 0;
efee->blocks = tal_dup_arr(efee, u32, blocks, num_estimates, 0);
efee->estmode = tal_dup_arr(efee, const char *, estmode, num_estimates,
0);
efee->cb = cb;
efee->arg = arg;
efee->satoshi_per_kw = tal_arr(efee, u64, num_estimates);
do_one_estimatefee(bitcoind, efee);
}
static void process_sendrawtx(struct bitcoin_cli *bcli)