Function handle_invoice

plugins/offers_inv_hook.c:320–403

}

struct command_result *handle_invoice(struct command *cmd,
				      const u8 *invbin,
				      struct tlv_onionmsg_payload_reply_path *reply_path STEALS)
{
	size_t len = tal_count(invbin);
	struct inv *inv = tal(cmd, struct inv);
	struct out_req *req;
	struct command_result *err;
	int bad_feature;
	struct sha256 m, shash;

	inv->reply_path = tal_steal(inv, reply_path);

	inv->inv = fromwire_tlv_invoice(cmd, &invbin, &len);
	if (!inv->inv) {
		return fail_inv(cmd, inv,
				"Invalid invoice %s",
				tal_hex(tmpctx, invbin));
	}

	/* BOLT-offers #12:
	 *
	 * The reader of an invoice_request:
	 *...
	 *   - MUST fail the request if `features` contains unknown even bits.
	 */
	bad_feature = features_unsupported(plugin_feature_set(cmd->plugin),
					   inv->inv->features,
					   BOLT11_FEATURE);
	if (bad_feature != -1) {
		return fail_inv(cmd, inv,
				"Unsupported inv feature %i",
				bad_feature);
	}

	/* BOLT-offers #12:
	 *
	 * The reader of an invoice_request:
	 *...
	 *   - if `chain` is not present:
	 *     - MUST fail the request if bitcoin is not a supported chain.
	 *   - otherwise:
	 *     - MUST fail the request if `chain` is not a supported chain.
	 */
	if (!bolt12_chain_matches(inv->inv->chain, chainparams)) {
		return fail_inv(cmd, inv,
				"Wrong chain %s",
				tal_hex(tmpctx, inv->inv->chain));
	}

	/* BOLT-offers #12:
	 * - MUST reject the invoice if `signature` is not a valid signature
	 *   using `node_id` as described in
	 *   [Signature Calculation](#signature-calculation).
	 */
	err = inv_must_have(cmd, inv, node_id);
	if (err)
		return err;