#include "pay.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /*----------------------------------------------------------------------------- Internal sendpay interface -----------------------------------------------------------------------------*/ /* sendpay command */ struct sendpay_command { struct list_node list; struct sha256 payment_hash; void (*cb)(const struct sendpay_result *, void*); void *cbarg; }; static void destroy_sendpay_command(struct sendpay_command *pc) { list_del(&pc->list); } /* Owned by cxt, if cxt is deleted, then cb will * no longer be called. */ static void add_sendpay_waiter(const tal_t *cxt, const struct sha256 *payment_hash, struct lightningd *ld, void (*cb)(const struct sendpay_result *, void*), void *cbarg) { struct sendpay_command *pc = tal(cxt, struct sendpay_command); pc->payment_hash = *payment_hash; pc->cb = cb; pc->cbarg = cbarg; list_add(&ld->sendpay_commands, &pc->list); tal_add_destructor(pc, destroy_sendpay_command); } /* Owned by cxt; if cxt is deleted, then cb will * no longer be called. */ static void add_waitsendpay_waiter(const tal_t *cxt, const struct sha256 *payment_hash, struct lightningd *ld, void (*cb)(const struct sendpay_result *, void*), void *cbarg) { struct sendpay_command *pc = tal(cxt, struct sendpay_command); pc->payment_hash = *payment_hash; pc->cb = cb; pc->cbarg = cbarg; list_add(&ld->waitsendpay_commands, &pc->list); tal_add_destructor(pc, destroy_sendpay_command); } /* Caller responsible for freeing ctx. */ static void waitsendpay_resolve(const tal_t *ctx, struct lightningd *ld, const struct sha256 *payment_hash, const struct sendpay_result *result) { struct sendpay_command *pc; struct sendpay_command *next; list_for_each_safe(&ld->waitsendpay_commands, pc, next, list) { if (!structeq(payment_hash, &pc->payment_hash)) continue; /* Delete later (in our own caller) if callback did * not delete. */ tal_steal(ctx, pc); pc->cb(result, pc->cbarg); } } static struct sendpay_result* sendpay_result_success(const tal_t *ctx, const struct preimage *payment_preimage, const struct wallet_payment *payment) { struct sendpay_result *result = tal(ctx, struct sendpay_result); result->succeeded = true; result->preimage = *payment_preimage; result->payment = payment; return result; } static void payment_trigger_success(struct lightningd *ld, const struct sha256 *payment_hash) { struct sendpay_result *result; struct wallet_payment *payment; payment = wallet_payment_by_hash(tmpctx, ld->wallet, payment_hash); assert(payment); result = sendpay_result_success(tmpctx, payment->payment_preimage, payment); waitsendpay_resolve(tmpctx, ld, payment_hash, result); } static struct sendpay_result* sendpay_result_route_failure(const tal_t *ctx, bool retry_plausible, struct routing_failure *fail, const u8 *onionreply, const char *details) { struct sendpay_result *result = tal(ctx, struct sendpay_result); result->succeeded = false; result->errorcode = (!fail) ? PAY_UNPARSEABLE_ONION : (!retry_plausible) ? PAY_DESTINATION_PERM_FAIL : /*otherwise*/ PAY_TRY_OTHER_ROUTE ; result->onionreply = onionreply; result->routing_failure = fail; result->details = details; return result; } static void payment_route_failure(struct lightningd *ld, const struct sha256 *payment_hash, bool retry_plausible, struct routing_failure *fail, const u8 *onionreply, const char *details) { struct sendpay_result *result; result = sendpay_result_route_failure(tmpctx, retry_plausible, fail, onionreply, details); waitsendpay_resolve(tmpctx, ld, payment_hash, result); } static struct sendpay_result * sendpay_result_simple_fail(const tal_t *ctx, int errorcode, char const *details) { struct sendpay_result *result = tal(ctx, struct sendpay_result); result->succeeded = false; result->errorcode = errorcode; result->details = details; return result; } static struct sendpay_result * sendpay_result_in_progress(const tal_t *ctx, const struct wallet_payment* payment, char const *details) { struct sendpay_result *result = tal(ctx, struct sendpay_result); result->succeeded = false; result->errorcode = PAY_IN_PROGRESS; result->payment = payment; result->details = details; return result; } void payment_succeeded(struct lightningd *ld, struct htlc_out *hout, const struct preimage *rval) { wallet_payment_set_status(ld->wallet, &hout->payment_hash, PAYMENT_COMPLETE, rval); payment_trigger_success(ld, &hout->payment_hash); } /* Return NULL if the wrapped onion error message has no * channel_update field, or return the embedded * channel_update message otherwise. */ static u8 *channel_update_from_onion_error(const tal_t *ctx, const u8 *onion_message) { u8 *channel_update = NULL; u64 unused64; u32 unused32; /* Identify failcodes that have some channel_update. * * TODO > BOLT 1.0: Add new failcodes when updating to a * new BOLT version. */ if (!fromwire_temporary_channel_failure(ctx, onion_message, &channel_update) && !fromwire_amount_below_minimum(ctx, onion_message, &unused64, &channel_update) && !fromwire_fee_insufficient(ctx, onion_message, &unused64, &channel_update) && !fromwire_incorrect_cltv_expiry(ctx, onion_message, &unused32, &channel_update) && !fromwire_expiry_too_soon(ctx, onion_message, &channel_update)) /* No channel update. */ channel_update = NULL; return channel_update; } /* Return a struct routing_failure for an immediate failure * (returned directly from send_htlc_out). The returned * failure is allocated from the given context. */ static struct routing_failure* immediate_routing_failure(const tal_t *ctx, const struct lightningd *ld, enum onion_type failcode, const struct short_channel_id *channel0) { struct routing_failure *routing_failure; assert(failcode); routing_failure = tal(ctx, struct routing_failure); routing_failure->erring_index = 0; routing_failure->failcode = failcode; routing_failure->erring_node = ld->id; routing_failure->erring_channel = *channel0; routing_failure->channel_update = NULL; return routing_failure; } /* Return a struct routing_failure for a local failure allocated * from the given context. */ static struct routing_failure* local_routing_failure(const tal_t *ctx, const struct lightningd *ld, const struct htlc_out *hout, const struct wallet_payment *payment) { struct routing_failure *routing_failure; assert(hout->failcode); routing_failure = tal(ctx, struct routing_failure); routing_failure->erring_index = 0; routing_failure->failcode = hout->failcode; routing_failure->erring_node = ld->id; routing_failure->erring_channel = payment->route_channels[0]; routing_failure->channel_update = NULL; return routing_failure; } /* Return false if permanent failure at the destination, true if * retrying is plausible. Fill *routing_failure with NULL if * we cannot report the remote failure, or with the routing * failure to report (allocated from ctx) otherwise. */ static struct routing_failure* remote_routing_failure(const tal_t *ctx, bool *p_retry_plausible, bool *p_report_to_gossipd, const struct wallet_payment *payment, const struct onionreply *failure) { enum onion_type failcode = fromwire_peektype(failure->msg); u8 *channel_update; struct routing_failure *routing_failure; const struct pubkey *route_nodes; const struct pubkey *erring_node; const struct short_channel_id *route_channels; const struct short_channel_id *erring_channel; static const struct short_channel_id dummy_channel = { 0 }; int origin_index; bool retry_plausible; bool report_to_gossipd; routing_failure = tal(ctx, struct routing_failure); route_nodes = payment->route_nodes; route_channels = payment->route_channels; origin_index = failure->origin_index; channel_update = channel_update_from_onion_error(routing_failure, failure->msg); retry_plausible = true; report_to_gossipd = true; assert(origin_index < tal_count(route_nodes)); /* Check if at destination. */ if (origin_index == tal_count(route_nodes) - 1) { erring_channel = &dummy_channel; /* BOLT #4: * * - if the _final node_ is returning the error: * - if the PERM bit is set: * - SHOULD fail the payment. * */ if (failcode & PERM) retry_plausible = false; else retry_plausible = true; /* Only send message to gossipd if NODE error; * there is no "next" channel to report as * failing if this is the last node. */ if (failcode & NODE) report_to_gossipd = true; else report_to_gossipd = false; } else /* Report the *next* channel as failing. */ erring_channel = &route_channels[origin_index + 1]; erring_node = &route_nodes[origin_index]; routing_failure->erring_index = (unsigned int) (origin_index + 1); routing_failure->failcode = failcode; routing_failure->erring_node = *erring_node; routing_failure->erring_channel = *erring_channel; routing_failure->channel_update = channel_update; *p_retry_plausible = retry_plausible; *p_report_to_gossipd = report_to_gossipd; return routing_failure; } static void random_mark_channel_unroutable(struct log *log, struct subd *gossip, struct short_channel_id *route_channels) { size_t num_channels = tal_count(route_channels); size_t i; const struct short_channel_id *channel; u8 *msg; assert(num_channels != 0); /* Select one channel by random. */ randombytes_buf(&i, sizeof(i)); i = i % num_channels; channel = &route_channels[i]; log_debug(log, "Disable randomly %dth channel (%s) along route " "(guessing due to bad reply)", (int) i, type_to_string(tmpctx, struct short_channel_id, channel)); msg = towire_gossip_mark_channel_unroutable(tmpctx, channel); subd_send_msg(gossip, msg); } static void report_routing_failure(struct log *log, struct subd *gossip, struct routing_failure *fail) { u8 *gossip_msg; assert(fail); log_debug(log, "Reporting route failure to gossipd: 0x%04x (%s) " "node %s channel %s update %s", fail->failcode, onion_type_name(fail->failcode), type_to_string(tmpctx, struct pubkey, &fail->erring_node), type_to_string(tmpctx, struct short_channel_id, &fail->erring_channel), tal_hex(tmpctx, fail->channel_update)); gossip_msg = towire_gossip_routing_failure(tmpctx, &fail->erring_node, &fail->erring_channel, (u16) fail->failcode, fail->channel_update); subd_send_msg(gossip, gossip_msg); } void payment_store(struct lightningd *ld, const struct sha256 *payment_hash) { struct sendpay_command *pc; struct sendpay_command *next; struct sendpay_result *result; const struct wallet_payment *payment; wallet_payment_store(ld->wallet, payment_hash); payment = wallet_payment_by_hash(tmpctx, ld->wallet, payment_hash); assert(payment); /* Invent a sendpay result with PAY_IN_PROGRESS. */ result = sendpay_result_in_progress(tmpctx, payment, "Payment is still in progress"); /* Trigger any sendpay commands waiting for the store to occur. */ list_for_each_safe(&ld->sendpay_commands, pc, next, list) { if (!structeq(payment_hash, &pc->payment_hash)) continue; /* Delete later if callback did not delete. */ tal_steal(tmpctx, pc); pc->cb(result, pc->cbarg); } } void payment_failed(struct lightningd *ld, const struct htlc_out *hout, const char *localfail) { struct wallet_payment *payment; struct routing_failure* fail = NULL; const char *failmsg; bool retry_plausible; bool report_to_gossipd; payment = wallet_payment_by_hash(tmpctx, ld->wallet, &hout->payment_hash); #ifdef COMPAT_V052 /* Prior to "pay: delete HTLC when we delete payment." we would * delete a payment on retry, but leave the HTLC. */ if (!payment) { log_unusual(hout->key.channel->log, "No payment for %s:" " was this an old database?", type_to_string(tmpctx, struct sha256, &hout->payment_hash)); return; } /* FIXME: Prior to 299b280f7, we didn't put route_nodes and * route_channels in db. If this happens, it's an old payment, * so we can simply mark it failed in db and return. */ if (!payment->route_channels) { log_unusual(hout->key.channel->log, "No route_channels for htlc %s:" " was this an old database?", type_to_string(tmpctx, struct sha256, &hout->payment_hash)); wallet_payment_set_status(ld->wallet, &hout->payment_hash, PAYMENT_FAILED, NULL); return; } #endif /* This gives more details than a generic failure message */ if (localfail) { fail = local_routing_failure(tmpctx, ld, hout, payment); failmsg = localfail; retry_plausible = true; report_to_gossipd = true; } else { /* Must be remote fail. */ assert(!hout->failcode); failmsg = "reply from remote"; /* Try to parse reply. */ struct secret *path_secrets = payment->path_secrets; struct onionreply *reply = unwrap_onionreply(tmpctx, path_secrets, tal_count(path_secrets), hout->failuremsg); if (!reply) { log_info(hout->key.channel->log, "htlc %"PRIu64" failed with bad reply (%s)", hout->key.id, tal_hex(tmpctx, hout->failuremsg)); /* Cannot report failure. */ fail = NULL; /* Select a channel to mark unroutable by random */ random_mark_channel_unroutable(hout->key.channel->log, ld->gossip, payment->route_channels); /* Can now retry; we selected a channel to mark * unroutable by random */ retry_plausible = true; /* Already reported something to gossipd, do not * report anything else */ report_to_gossipd = false; } else { enum onion_type failcode = fromwire_peektype(reply->msg); log_info(hout->key.channel->log, "htlc %"PRIu64" " "failed from %ith node " "with code 0x%04x (%s)", hout->key.id, reply->origin_index, failcode, onion_type_name(failcode)); fail = remote_routing_failure(tmpctx, &retry_plausible, &report_to_gossipd, payment, reply); } } /* Save to DB */ payment_store(ld, &hout->payment_hash); wallet_payment_set_status(ld->wallet, &hout->payment_hash, PAYMENT_FAILED, NULL); wallet_payment_set_failinfo(ld->wallet, &hout->payment_hash, fail ? NULL : hout->failuremsg, (fail && !retry_plausible), fail ? fail->erring_index : -1, fail ? fail->failcode : 0, fail ? &fail->erring_node : NULL, fail ? &fail->erring_channel : NULL, fail ? fail->channel_update : NULL); /* Report to gossipd if we decided we should. */ if (report_to_gossipd) report_routing_failure(ld->log, ld->gossip, fail); /* Report to client. */ payment_route_failure(ld, &hout->payment_hash, retry_plausible, fail, hout->failuremsg, failmsg); } /* Wait for a payment. If cxt is deleted, then cb will * no longer be called. * Return false if we called callback already, true if * callback is scheduled for later. */ bool wait_payment(const tal_t *cxt, struct lightningd *ld, const struct sha256 *payment_hash, void (*cb)(const struct sendpay_result *, void*), void *cbarg) { struct wallet_payment *payment; struct sendpay_result *result; char const *details; bool cb_not_called; u8 *failonionreply; bool faildestperm; int failindex; enum onion_type failcode; struct pubkey *failnode; struct short_channel_id *failchannel; u8 *failupdate; struct routing_failure *fail; payment = wallet_payment_by_hash(tmpctx, ld->wallet, payment_hash); if (!payment) { details = tal_fmt(tmpctx, "Never attempted payment for '%s'", type_to_string(tmpctx, struct sha256, payment_hash)); result = sendpay_result_simple_fail(tmpctx, PAY_NO_SUCH_PAYMENT, details); cb(result, cbarg); cb_not_called = false; goto end; } switch (payment->status) { case PAYMENT_PENDING: add_waitsendpay_waiter(cxt, payment_hash, ld, cb, cbarg); cb_not_called = true; goto end; case PAYMENT_COMPLETE: result = sendpay_result_success(tmpctx, payment->payment_preimage, payment); cb(result, cbarg); cb_not_called = false; goto end; case PAYMENT_FAILED: /* Get error from DB */ wallet_payment_get_failinfo(tmpctx, ld->wallet, payment_hash, &failonionreply, &faildestperm, &failindex, &failcode, &failnode, &failchannel, &failupdate); /* Old DB might not save failure information */ if (!failonionreply && !failnode) result = sendpay_result_simple_fail(tmpctx, PAY_UNSPECIFIED_ERROR, "Payment failure reason unknown"); else if (failonionreply) { /* failed to parse returned onion error */ result = sendpay_result_route_failure(tmpctx, true, NULL, failonionreply, "reply from remote"); } else { /* Parsed onion error, get its details */ assert(failnode); assert(failchannel); fail = tal(tmpctx, struct routing_failure); fail->erring_index = failindex; fail->failcode = failcode; fail->erring_node = *failnode; fail->erring_channel = *failchannel; fail->channel_update = failupdate; result = sendpay_result_route_failure(tmpctx, !faildestperm, fail, NULL, "route failure"); } cb(result, cbarg); cb_not_called = false; goto end; } /* Impossible. */ abort(); end: return cb_not_called; } /* Returns false if cb was called, true if cb not yet called. */ bool send_payment(const tal_t *ctx, struct lightningd* ld, const struct sha256 *rhash, const struct route_hop *route, u64 msatoshi, void (*cb)(const struct sendpay_result *, void*), void *cbarg) { const u8 *onion; u8 sessionkey[32]; unsigned int base_expiry; struct onionpacket *packet; struct secret *path_secrets; enum onion_type failcode; size_t i, n_hops = tal_count(route); struct hop_data *hop_data = tal_arr(tmpctx, struct hop_data, n_hops); struct pubkey *ids = tal_arr(tmpctx, struct pubkey, n_hops); struct wallet_payment *payment = NULL; struct htlc_out *hout; struct short_channel_id *channels; struct routing_failure *fail; struct channel *channel; struct sendpay_result *result; /* Expiry for HTLCs is absolute. And add one to give some margin. */ base_expiry = get_block_height(ld->topology) + 1; /* Extract IDs for each hop: create_onionpacket wants array. */ for (i = 0; i < n_hops; i++) ids[i] = route[i].nodeid; /* Copy hop_data[n] from route[n+1] (ie. where it goes next) */ for (i = 0; i < n_hops - 1; i++) { hop_data[i].realm = 0; hop_data[i].channel_id = route[i+1].channel_id; hop_data[i].amt_forward = route[i+1].amount; hop_data[i].outgoing_cltv = base_expiry + route[i+1].delay; } /* And finally set the final hop to the special values in * BOLT04 */ hop_data[i].realm = 0; hop_data[i].outgoing_cltv = base_expiry + route[i].delay; memset(&hop_data[i].channel_id, 0, sizeof(struct short_channel_id)); hop_data[i].amt_forward = route[i].amount; /* Now, do we already have a payment? */ payment = wallet_payment_by_hash(tmpctx, ld->wallet, rhash); if (payment) { /* FIXME: We should really do something smarter here! */ log_debug(ld->log, "send_payment: found previous"); if (payment->status == PAYMENT_PENDING) { log_add(ld->log, "Payment is still in progress"); result = sendpay_result_in_progress(tmpctx, payment, "Payment is still in progress"); cb(result, cbarg); return false; } if (payment->status == PAYMENT_COMPLETE) { log_add(ld->log, "... succeeded"); /* Must match successful payment parameters. */ if (payment->msatoshi != msatoshi) { char *msg = tal_fmt(tmpctx, "Already succeeded " "with amount %"PRIu64, payment->msatoshi); result = sendpay_result_simple_fail(tmpctx, PAY_RHASH_ALREADY_USED, msg); cb(result, cbarg); return false; } if (!structeq(&payment->destination, &ids[n_hops-1])) { char *msg = tal_fmt(tmpctx, "Already succeeded to %s", type_to_string(tmpctx, struct pubkey, &payment->destination)); result = sendpay_result_simple_fail(tmpctx, PAY_RHASH_ALREADY_USED, msg); cb(result, cbarg); return false; } result = sendpay_result_success(tmpctx, payment->payment_preimage, payment); cb(result, cbarg); return false; } log_add(ld->log, "... retrying"); } channel = active_channel_by_id(ld, &ids[0], NULL); if (!channel) { /* Report routing failure to gossipd */ fail = immediate_routing_failure(ctx, ld, WIRE_UNKNOWN_NEXT_PEER, &route[0].channel_id); report_routing_failure(ld->log, ld->gossip, fail); /* Report routing failure to caller */ result = sendpay_result_route_failure(tmpctx, true, fail, NULL, "No connection to first " "peer found"); cb(result, cbarg); return false; } randombytes_buf(&sessionkey, sizeof(sessionkey)); /* Onion will carry us from first peer onwards. */ packet = create_onionpacket(tmpctx, ids, hop_data, sessionkey, rhash->u.u8, sizeof(struct sha256), &path_secrets); onion = serialize_onionpacket(tmpctx, packet); log_info(ld->log, "Sending %u over %zu hops to deliver %"PRIu64"", route[0].amount, n_hops, msatoshi); failcode = send_htlc_out(channel, route[0].amount, base_expiry + route[0].delay, rhash, onion, NULL, &hout); if (failcode) { /* Report routing failure to gossipd */ fail = immediate_routing_failure(ctx, ld, failcode, &route[0].channel_id); report_routing_failure(ld->log, ld->gossip, fail); /* Report routing failure to caller */ result = sendpay_result_route_failure(tmpctx, true, fail, NULL, "First peer not ready"); cb(result, cbarg); return false; } /* Copy channels used along the route. */ channels = tal_arr(tmpctx, struct short_channel_id, n_hops); for (i = 0; i < n_hops; ++i) channels[i] = route[i].channel_id; /* If we're retrying, delete all trace of previous one. We delete * outgoing HTLC, too, otherwise it gets reported to onchaind as * a possibility, and we end up in handle_missing_htlc_output-> * onchain_failed_our_htlc->payment_failed with no payment. */ if (payment) { wallet_payment_delete(ld->wallet, rhash); wallet_local_htlc_out_delete(ld->wallet, channel, rhash); } /* If hout fails, payment should be freed too. */ payment = tal(hout, struct wallet_payment); payment->id = 0; payment->payment_hash = *rhash; payment->destination = ids[n_hops - 1]; payment->status = PAYMENT_PENDING; payment->msatoshi = msatoshi; payment->msatoshi_sent = route[0].amount; payment->timestamp = time_now().ts.tv_sec; payment->payment_preimage = NULL; payment->path_secrets = tal_steal(payment, path_secrets); payment->route_nodes = tal_steal(payment, ids); payment->route_channels = tal_steal(payment, channels); /* We write this into db when HTLC is actually sent. */ wallet_payment_setup(ld->wallet, payment); add_sendpay_waiter(ctx, rhash, ld, cb, cbarg); return true; } /*----------------------------------------------------------------------------- JSON-RPC sendpay interface -----------------------------------------------------------------------------*/ static void json_sendpay_success(struct command *cmd, const struct sendpay_result *r) { struct json_result *response; assert(r->payment->status == PAYMENT_COMPLETE); response = new_json_result(cmd); json_object_start(response, NULL); json_add_payment_fields(response, r->payment); json_object_end(response); command_success(cmd, response); } static void json_waitsendpay_on_resolve(const struct sendpay_result *r, void *vcmd) { struct command *cmd = (struct command*) vcmd; struct json_result *data = NULL; const char *msg = NULL; struct routing_failure *fail; if (r->succeeded) json_sendpay_success(cmd, r); else { switch (r->errorcode) { /* We will never handle this case */ case PAY_IN_PROGRESS: abort(); case PAY_RHASH_ALREADY_USED: case PAY_UNSPECIFIED_ERROR: case PAY_NO_SUCH_PAYMENT: data = NULL; msg = r->details; break; case PAY_UNPARSEABLE_ONION: data = new_json_result(cmd); json_object_start(data, NULL); json_add_hex(data, "onionreply", r->onionreply, tal_len(r->onionreply)); json_object_end(data); assert(r->details != NULL); msg = tal_fmt(cmd, "failed: WIRE_PERMANENT_NODE_FAILURE " "(%s)", r->details); break; case PAY_DESTINATION_PERM_FAIL: case PAY_TRY_OTHER_ROUTE: fail = r->routing_failure; data = new_json_result(cmd); json_object_start(data, NULL); json_add_num(data, "erring_index", fail->erring_index); json_add_num(data, "failcode", (unsigned) fail->failcode); json_add_hex(data, "erring_node", &fail->erring_node, sizeof(fail->erring_node)); json_add_short_channel_id(data, "erring_channel", &fail->erring_channel); if (fail->channel_update) json_add_hex(data, "channel_update", fail->channel_update, tal_len(fail->channel_update)); json_object_end(data); assert(r->details != NULL); msg = tal_fmt(cmd, "failed: %s (%s)", onion_type_name(fail->failcode), r->details); break; } assert(msg); command_fail_detailed(cmd, r->errorcode, data, "%s", msg); } } static void json_sendpay_on_resolve(const struct sendpay_result* r, void *vcmd) { struct command *cmd = (struct command*) vcmd; if (!r->succeeded && r->errorcode == PAY_IN_PROGRESS) { /* This is normal for sendpay. Succeed. */ struct json_result *response = new_json_result(cmd); json_object_start(response, NULL); json_add_string(response, "message", "Monitor status with listpayments or waitsendpay"); json_add_payment_fields(response, r->payment); json_object_end(response); command_success(cmd, response); } else json_waitsendpay_on_resolve(r, cmd); } static void json_sendpay(struct command *cmd, const char *buffer, const jsmntok_t *params) { jsmntok_t *routetok, *rhashtok; jsmntok_t *msatoshitok; const jsmntok_t *t, *end; size_t n_hops; struct sha256 rhash; struct route_hop *route; u64 msatoshi; if (!json_get_params(cmd, buffer, params, "route", &routetok, "payment_hash", &rhashtok, "?msatoshi", &msatoshitok, NULL)) { return; } if (!hex_decode(buffer + rhashtok->start, rhashtok->end - rhashtok->start, &rhash, sizeof(rhash))) { command_fail(cmd, "'%.*s' is not a valid sha256 hash", rhashtok->end - rhashtok->start, buffer + rhashtok->start); return; } if (routetok->type != JSMN_ARRAY) { command_fail(cmd, "'%.*s' is not an array", routetok->end - routetok->start, buffer + routetok->start); return; } end = json_next(routetok); n_hops = 0; route = tal_arr(cmd, struct route_hop, n_hops); for (t = routetok + 1; t < end; t = json_next(t)) { const jsmntok_t *amttok, *idtok, *delaytok, *chantok; if (t->type != JSMN_OBJECT) { command_fail(cmd, "Route %zu '%.*s' is not an object", n_hops, t->end - t->start, buffer + t->start); return; } amttok = json_get_member(buffer, t, "msatoshi"); idtok = json_get_member(buffer, t, "id"); delaytok = json_get_member(buffer, t, "delay"); chantok = json_get_member(buffer, t, "channel"); if (!amttok || !idtok || !delaytok || !chantok) { command_fail(cmd, "Route %zu needs msatoshi/id/channel/delay", n_hops); return; } tal_resize(&route, n_hops + 1); /* What that hop will forward */ if (!json_tok_number(buffer, amttok, &route[n_hops].amount)) { command_fail(cmd, "Route %zu invalid msatoshi", n_hops); return; } if (!json_tok_short_channel_id(buffer, chantok, &route[n_hops].channel_id)) { command_fail(cmd, "Route %zu invalid channel_id", n_hops); return; } if (!json_tok_pubkey(buffer, idtok, &route[n_hops].nodeid)) { command_fail(cmd, "Route %zu invalid id", n_hops); return; } if (!json_tok_number(buffer, delaytok, &route[n_hops].delay)) { command_fail(cmd, "Route %zu invalid delay", n_hops); return; } n_hops++; } if (n_hops == 0) { command_fail(cmd, "Empty route"); return; } if (msatoshitok) { if (!json_tok_u64(buffer, msatoshitok, &msatoshi)) { command_fail(cmd, "'%.*s' is not a number", msatoshitok->end - msatoshitok->start, buffer + msatoshitok->start); return; } /* The given msatoshi is the actual payment that * the payee is requesting. The final hop amount, is * what we actually give, which can be from the * msatoshi to twice msatoshi. */ /* if not: msatoshi <= finalhop.amount <= 2 * msatoshi, * fail. */ if (!(msatoshi <= route[n_hops-1].amount && route[n_hops-1].amount <= 2 * msatoshi)) { command_fail(cmd, "msatoshi %"PRIu64" out of range", msatoshi); return; } } else msatoshi = route[n_hops-1].amount; if (send_payment(cmd, cmd->ld, &rhash, route, msatoshi, &json_sendpay_on_resolve, cmd)) command_still_pending(cmd); } static const struct json_command sendpay_command = { "sendpay", json_sendpay, "Send along {route} in return for preimage of {payment_hash}" }; AUTODATA(json_command, &sendpay_command); static void waitsendpay_timeout(struct command *cmd) { command_fail_detailed(cmd, PAY_IN_PROGRESS, NULL, "Timed out while waiting"); } static void json_waitsendpay(struct command *cmd, const char *buffer, const jsmntok_t *params) { jsmntok_t *rhashtok; jsmntok_t *timeouttok; struct sha256 rhash; unsigned int timeout; if (!json_get_params(cmd, buffer, params, "payment_hash", &rhashtok, "?timeout", &timeouttok, NULL)) return; if (!hex_decode(buffer + rhashtok->start, rhashtok->end - rhashtok->start, &rhash, sizeof(rhash))) { command_fail(cmd, "'%.*s' is not a valid sha256 hash", rhashtok->end - rhashtok->start, buffer + rhashtok->start); return; } if (timeouttok && !json_tok_number(buffer, timeouttok, &timeout)) { command_fail(cmd, "'%.*s' is not a valid number", timeouttok->end - timeouttok->start, buffer + timeouttok->start); return; } if (!wait_payment(cmd, cmd->ld, &rhash, &json_waitsendpay_on_resolve, cmd)) return; if (timeouttok) new_reltimer(&cmd->ld->timers, cmd, time_from_sec(timeout), &waitsendpay_timeout, cmd); command_still_pending(cmd); } static const struct json_command waitsendpay_command = { "waitsendpay", json_waitsendpay, "Wait for payment attempt on {payment_hash} to succeed or fail, " "but only up to {timeout} seconds." }; AUTODATA(json_command, &waitsendpay_command); static void json_listpayments(struct command *cmd, const char *buffer, const jsmntok_t *params) { const struct wallet_payment **payments; struct json_result *response = new_json_result(cmd); jsmntok_t *bolt11tok, *rhashtok; struct sha256 *rhash = NULL; if (!json_get_params(cmd, buffer, params, "?bolt11", &bolt11tok, "?payment_hash", &rhashtok, NULL)) { return; } if (bolt11tok) { struct bolt11 *b11; char *b11str, *fail; if (rhashtok) { command_fail(cmd, "Can only specify one of" " {bolt11} or {payment_hash}"); return; } b11str = tal_strndup(cmd, buffer + bolt11tok->start, bolt11tok->end - bolt11tok->start); b11 = bolt11_decode(cmd, b11str, NULL, &fail); if (!b11) { command_fail(cmd, "Invalid bolt11: %s", fail); return; } rhash = &b11->payment_hash; } else if (rhashtok) { rhash = tal(cmd, struct sha256); if (!hex_decode(buffer + rhashtok->start, rhashtok->end - rhashtok->start, rhash, sizeof(*rhash))) { command_fail(cmd, "'%.*s' is not a valid sha256 hash", rhashtok->end - rhashtok->start, buffer + rhashtok->start); return; } } payments = wallet_payment_list(cmd, cmd->ld->wallet, rhash); json_object_start(response, NULL); json_array_start(response, "payments"); for (int i=0; i