Function json_fundchannel_start

lightningd/opening_control.c:1294–1518

* json_fundchannel_start - Entrypoint for funding a channel */

 * json_fundchannel_start - Entrypoint for funding a channel
 */
static struct command_result *json_fundchannel_start(struct command *cmd,
						     const char *buffer,
						     const jsmntok_t *obj UNNEEDED,
						     const jsmntok_t *params)
{
	struct funding_channel * fc = tal(cmd, struct funding_channel);
	struct node_id *id;
	struct peer *peer;
	bool *announce_channel;
	u32 *feerate_non_anchor, feerate_anchor, *mindepth;
	struct amount_sat *amount, *reserve;
	struct amount_msat *push_msat;
	u32 *upfront_shutdown_script_wallet_index;
	struct channel_id tmp_channel_id;
	struct channel_type *ctype;

	fc->cmd = cmd;
	fc->cancels = tal_arr(fc, struct command *, 0);
	fc->uc = NULL;
	fc->inflight = false;
	fc->funding_scriptpubkey = NULL;

	if (!param_check(fc->cmd, buffer, params,
			 p_req("id", param_node_id, &id),
			 p_req("amount", param_sat, &amount),
			 p_opt("feerate", param_feerate, &feerate_non_anchor),
			 p_opt_def("announce", param_bool, &announce_channel, true),
			 p_opt("close_to", param_bitcoin_address, &fc->our_upfront_shutdown_script),
			 p_opt("push_msat", param_msat, &push_msat),
			 p_opt("mindepth", param_u32, &mindepth),
			 p_opt("reserve", param_sat, &reserve),
			 p_opt("channel_type", param_channel_type, &ctype),
			 NULL))
		return command_param_failed();

	if (ctype) {
		fc->channel_type = tal_steal(fc, ctype);
		if (!cmd->ld->dev_any_channel_type &&
		    !channel_type_accept(tmpctx,
					 ctype->features,
					 cmd->ld->our_features)) {
			return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
					    "channel_type not supported");
		}
		/* BOLT #2:
		 *
		 * The sender:
		 *   - if `channel_type` includes `option_zeroconf`:
		 *      - MUST set `minimum_depth` to zero.
		 *   - otherwise:
		 *     - SHOULD set `minimum_depth` to a number of blocks it
		 *       considers reasonable to avoid double-spending of the
		 *       funding transaction.
		 */
		if (channel_type_has(ctype, OPT_ZEROCONF)) {
			if (mindepth && *mindepth != 0) {
				return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
						    "Cannot set non-zero mindepth for zero-conf channel_type");