Function update_knowledge_from_error

plugins/xpay/xpay.c:895–1196

}

static void update_knowledge_from_error(struct command *aux_cmd,
					const char *buf,
					const jsmntok_t *error,
					struct attempt *attempt)
{
	const jsmntok_t *tok;
	struct onionreply *reply;
	struct out_req *req;
	const u8 *replymsg;
	int index;
	enum onion_wire failcode;
	bool from_final;
	const char *failcode_name, *errmsg, *description;
	enum jsonrpc_errcode ecode;

	tok = json_get_member(buf, error, "code");
	if (!tok || !json_to_jsonrpc_errcode(buf, tok, &ecode))
		plugin_err(aux_cmd->plugin, "Invalid injectpaymentonion result '%.*s'",
			   json_tok_full_len(error), json_tok_full(buf, error));

	if (ecode == PAY_INJECTPAYMENTONION_ALREADY_PAID) {
		/* pay was OK when this happened, so we fake it up. */
		if (attempt->payment->pay_compat && attempt->payment->cmd) {
			payment_already_paid(attempt->payment);
			return;
		}
		payment_give_up(aux_cmd, attempt->payment,
				PAY_INJECTPAYMENTONION_ALREADY_PAID,
				"Already paid this invoice successfully");
		return;
	}
	if (ecode != PAY_INJECTPAYMENTONION_FAILED) {
		payment_give_up(aux_cmd, attempt->payment,
				PLUGIN_ERROR,
				"Unexpected injectpaymentonion error %i: %.*s",
				ecode,
				json_tok_full_len(error),
				json_tok_full(buf, error));
		return;
	}

	tok = json_get_member(buf, error, "data");
	if (!tok)
		plugin_err(aux_cmd->plugin, "Invalid injectpaymentonion result '%.*s'",
			   json_tok_full_len(error), json_tok_full(buf, error));
	tok = json_get_member(buf, tok, "onionreply");
	if (!tok)
		plugin_err(aux_cmd->plugin, "Invalid injectpaymentonion result '%.*s'",
			   json_tok_full_len(error), json_tok_full(buf, error));
	reply = new_onionreply(tmpctx, take(json_tok_bin_from_hex(NULL, buf, tok)));

	replymsg = unwrap_onionreply(tmpctx,
				     attempt->shared_secrets,
				     tal_count(attempt->shared_secrets),
				     reply,
				     &index);

	/* Garbled?  Blame random hop. */