Function channel_amount_receivable

lightningd/peer_control.c:892–933

}

struct amount_msat channel_amount_receivable(const struct channel *channel)
{
	struct amount_msat their_msat, receivable;
	bool wumbo;

	/* Compute how much we can receive via this channel in one payment */
	if (!amount_sat_sub_msat(&their_msat,
				 channel->funding_sats, channel->our_msat))
		their_msat = AMOUNT_MSAT(0);

	if (!amount_msat_sub_sat(&receivable,
				 their_msat,
				 channel->our_config.channel_reserve))
		return AMOUNT_MSAT(0);

	/* Take away any currently-offered HTLCs. */
	subtract_received_htlcs(channel, &receivable);

	/* If they're opener, subtract txfees they'll need to spend this */
	if (channel->opener == REMOTE) {
		if (!amount_msat_deduct_sat(&receivable,
					    commit_txfee(channel,
							 receivable, REMOTE)))
			return AMOUNT_MSAT(0);
	}

	/* They can't offer an HTLC less than what we will accept. */
	if (amount_msat_less(receivable, channel->our_config.htlc_minimum))
		return AMOUNT_MSAT(0);

	wumbo = feature_negotiated(channel->peer->ld->our_features,
				   channel->peer->their_features,
				   OPT_LARGE_CHANNELS);

	/* They can't offer an HTLC over the max payment threshold either. */
	if (amount_msat_greater(receivable, chainparams->max_payment)
	    && !wumbo) {
		receivable = chainparams->max_payment;
	}

	return receivable;
}

static void NON_NULL_ARGS(1, 2, 4, 5) json_add_channel(struct command *cmd,
						       struct json_stream *response,