Function estimatefees_callback

lightningd/bitcoind.c:166–225

};

static void estimatefees_callback(const char *buf, const jsmntok_t *toks,
				  const jsmntok_t *idtok,
				  struct estimatefee_call *call)
{
	const jsmntok_t *resulttok, *feeratetok;
	u32 *feerates = tal_arr(call, u32, NUM_FEERATES);

	resulttok = json_get_member(buf, toks, "result");
	if (!resulttok)
		bitcoin_plugin_error(call->bitcoind, buf, toks,
				     "estimatefees",
				     "bad 'result' field");

	for (int f = 0; f < NUM_FEERATES; f++) {
		feeratetok = json_get_member(buf, resulttok, feerate_name(f));
		if (!feeratetok)
			bitcoin_plugin_error(call->bitcoind, buf, toks,
					     "estimatefees",
					     "missing '%s' field", feerate_name(f));
		/* We still use the bcli plugin for min and max, even with
		 * force_feerates */
		if (f < tal_count(call->bitcoind->ld->force_feerates)) {
			feerates[f] = call->bitcoind->ld->force_feerates[f];
			continue;
		}

		/* FIXME: We could trawl recent blocks for median fee... */
		if (!json_to_u32(buf, feeratetok, &feerates[f])) {
			if (chainparams->testnet)
				log_debug(call->bitcoind->log,
					  "Unable to estimate %s fees",
					  feerate_name(f));
			else
				log_unusual(call->bitcoind->log,
					    "Unable to estimate %s fees",
					    feerate_name(f));

#if DEVELOPER
			/* This is needed to test for failed feerate estimates
			* in DEVELOPER mode */
			feerates[f] = 0;
#else
			/* If we are in testnet mode we want to allow payments
			* with the minimal fee even if the estimate didn't
			* work out. This is less disruptive than erring out
			* all the time. */
			if (chainparams->testnet)
				feerates[f] = FEERATE_FLOOR;
			else
				feerates[f] = 0;
#endif
		} else
			/* Rate in satoshi per kw. */
			feerates[f] = feerate_from_style(feerates[f],
							 FEERATE_PER_KBYTE);
	}

	call->cb(call->bitcoind, feerates, call->arg);