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bitcoind: keep running fee estimate.

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This avoids us having to query it when we create anchor transaction, and
lets us always use dynamic fee information.

The config options for max and min are now percentages, rather than absolute.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2016-08-18 14:23:46 +09:30
parent ab38fd7542
commit 02cb7abd9d
11 changed files with 97 additions and 101 deletions
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23
daemon/chaintopology.c
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@@ -12,6 +12,7 @@
#include <ccan/asort/asort.h>
#include <ccan/io/io.h>
#include <ccan/structeq/structeq.h>
#include <inttypes.h>
struct block {
int height;
@@ -62,6 +63,7 @@ struct topology {
struct block *root;
struct block *tip;
struct block_map block_map;
u64 feerate;
};
static void start_poll_chaintip(struct lightningd_state *dstate);
@@ -304,6 +306,13 @@ static void free_blocks(struct lightningd_state *dstate, struct block *b)
}
}
static void update_fee(struct lightningd_state *dstate, u64 rate, u64 *feerate)
{
log_debug(dstate->base_log, "Feerate %"PRIu64" -> %"PRIu64,
rate, *feerate);
*feerate = rate;
}
/* B is the new chain (linked by ->next); update topology */
static void topology_changed(struct lightningd_state *dstate,
struct block *prev,
@@ -325,6 +334,9 @@ static void topology_changed(struct lightningd_state *dstate,
/* Maybe need to rebroadcast. */
rebroadcast_txs(dstate);
/* Once per new block head, update fee estimate. */
bitcoind_estimate_fee(dstate, update_fee, &dstate->topology->feerate);
}
static struct block *new_block(struct lightningd_state *dstate,
@@ -460,11 +472,22 @@ u32 get_block_height(struct lightningd_state *dstate)
return dstate->topology->tip->height;
}
u64 get_feerate(struct lightningd_state *dstate)
{
if (dstate->topology->feerate == 0) {
log_info(dstate->base_log,
"No fee estimate: using default fee rate");
return dstate->config.default_fee_rate;
}
return dstate->topology->feerate;
}
void setup_topology(struct lightningd_state *dstate)
{
dstate->topology = tal(dstate, struct topology);
block_map_init(&dstate->topology->block_map);
dstate->topology->feerate = 0;
bitcoind_getblockcount(dstate, get_init_blockhash, NULL);
/* Once it gets first block, it calls io_break() and we return. */