/* This plugin covers both sending and receiving offers */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define HEADER_LEN crypto_secretstream_xchacha20poly1305_HEADERBYTES #define ABYTES crypto_secretstream_xchacha20poly1305_ABYTES struct pubkey id; u32 blockheight; u16 cltv_final; bool offers_enabled; bool disable_connect; bool dev_invoice_bpath_scid; struct short_channel_id *dev_invoice_internal_scid; struct secret invoicesecret_base; struct secret offerblinding_base; struct secret nodealias_base; static struct gossmap *global_gossmap; static void init_gossmap(struct plugin *plugin) { size_t num_cupdates_rejected; global_gossmap = notleak_with_children(gossmap_load(plugin, GOSSIP_STORE_FILENAME, &num_cupdates_rejected)); if (!global_gossmap) plugin_err(plugin, "Could not load gossmap %s: %s", GOSSIP_STORE_FILENAME, strerror(errno)); if (num_cupdates_rejected) plugin_log(plugin, LOG_DBG, "gossmap ignored %zu channel updates", num_cupdates_rejected); } struct gossmap *get_gossmap(struct plugin *plugin) { if (!global_gossmap) init_gossmap(plugin); else gossmap_refresh(global_gossmap, NULL); return global_gossmap; } static struct command_result *finished(struct command *cmd, const char *buf, const jsmntok_t *result, void *unused) { return command_hook_success(cmd); } static struct command_result *injectonionmessage_error(struct command *cmd, const char *buf, const jsmntok_t *err, void *unused) { /* This can happen if the peer goes offline or wasn't directly * connected: "Unknown first peer" */ plugin_log(cmd->plugin, LOG_DBG, "injectonionmessage gave JSON error: %.*s", json_tok_full_len(err), json_tok_full(buf, err)); return command_hook_success(cmd); } struct command_result * inject_onionmessage_(struct command *cmd, const struct onion_message *omsg, struct command_result *(*cb)(struct command *command, const char *buf, const jsmntok_t *result, void *arg), struct command_result *(*errcb)(struct command *command, const char *buf, const jsmntok_t *result, void *arg), void *arg) { struct out_req *req; req = jsonrpc_request_start(cmd->plugin, cmd, "injectonionmessage", cb, errcb, arg); json_add_pubkey(req->js, "blinding", &omsg->first_blinding); json_array_start(req->js, "hops"); for (size_t i = 0; i < tal_count(omsg->hops); i++) { json_object_start(req->js, NULL); json_add_pubkey(req->js, "id", &omsg->hops[i]->pubkey); json_add_hex_talarr(req->js, "tlv", omsg->hops[i]->raw_payload); json_object_end(req->js); } json_array_end(req->js); return send_outreq(cmd->plugin, req); } /* Holds the details while we wait for establish_onion_path to connect */ struct onion_reply { struct blinded_path *reply_path; struct tlv_onionmsg_tlv *payload; }; static struct command_result *send_onion_reply_after_established(struct command *cmd, const struct pubkey *path, struct onion_reply *onion_reply) { struct onion_message *omsg; omsg = outgoing_onion_message(tmpctx, path, NULL, onion_reply->reply_path, onion_reply->payload); return inject_onionmessage(cmd, omsg, finished, injectonionmessage_error, onion_reply); } static struct command_result *send_onion_reply_not_established(struct command *cmd, const char *why, struct onion_reply *onion_reply) { plugin_log(cmd->plugin, LOG_DBG, "Failed to connect for reply via %s: %s", fmt_sciddir_or_pubkey(tmpctx, &onion_reply->reply_path->first_node_id), why); return command_hook_success(cmd); } static struct blinded_path *blinded_path_dup(const tal_t *ctx, const struct blinded_path *old) { struct blinded_path *bp = tal(ctx, struct blinded_path); *bp = *old; bp->path = tal_arr(bp, struct onionmsg_hop *, tal_count(old->path)); for (size_t i = 0; i < tal_count(bp->path); i++) { bp->path[i] = tal(bp->path, struct onionmsg_hop); bp->path[i]->blinded_node_id = old->path[i]->blinded_node_id; bp->path[i]->encrypted_recipient_data = tal_dup_talarr(bp->path[i], u8, old->path[i]->encrypted_recipient_data); } return bp; } struct command_result * send_onion_reply(struct command *cmd, struct blinded_path *reply_path, struct tlv_onionmsg_tlv *payload) { struct onion_reply *onion_reply; onion_reply = tal(cmd, struct onion_reply); onion_reply->reply_path = blinded_path_dup(onion_reply, reply_path); onion_reply->payload = tal_steal(onion_reply, payload); if (!gossmap_scidd_pubkey(get_gossmap(cmd->plugin), &onion_reply->reply_path->first_node_id)) { plugin_log(cmd->plugin, LOG_DBG, "Cannot resolve initial reply scidd %s", fmt_short_channel_id_dir(tmpctx, &onion_reply->reply_path->first_node_id.scidd)); return command_hook_success(cmd); } return establish_onion_path(cmd, get_gossmap(cmd->plugin), &id, &onion_reply->reply_path->first_node_id.pubkey, disable_connect, send_onion_reply_after_established, send_onion_reply_not_established, onion_reply); } static struct command_result *onion_message_recv(struct command *cmd, const char *buf, const jsmntok_t *params) { const jsmntok_t *om, *secrettok, *replytok, *invreqtok, *invtok; struct blinded_path *reply_path = NULL; struct secret *secret; if (!offers_enabled) return command_hook_success(cmd); om = json_get_member(buf, params, "onion_message"); secrettok = json_get_member(buf, om, "pathsecret"); if (secrettok) { secret = tal(tmpctx, struct secret); json_to_secret(buf, secrettok, secret); } else secret = NULL; /* Might be reply for fetchinvoice (which always has a secret, * so we can tell it's a response). */ if (secret) { struct command_result *res; res = handle_invoice_onion_message(cmd, buf, om, secret); if (res) return res; } replytok = json_get_member(buf, om, "reply_blindedpath"); if (replytok) { reply_path = json_to_blinded_path(cmd, buf, replytok); if (!reply_path) plugin_err(cmd->plugin, "Invalid reply path %.*s?", json_tok_full_len(replytok), json_tok_full(buf, replytok)); } invreqtok = json_get_member(buf, om, "invoice_request"); if (invreqtok) { const u8 *invreqbin = json_tok_bin_from_hex(tmpctx, buf, invreqtok); if (reply_path) return handle_invoice_request(cmd, invreqbin, reply_path, secret); else plugin_log(cmd->plugin, LOG_DBG, "invoice_request without reply_path"); } invtok = json_get_member(buf, om, "invoice"); if (invtok) { const u8 *invbin = json_tok_bin_from_hex(tmpctx, buf, invtok); if (invbin) return handle_invoice(cmd, invbin, reply_path, secret); } return command_hook_success(cmd); } struct find_best_peer_data { struct command_result *(*cb)(struct command *, const struct chaninfo *, void *); int needed_feature; void *arg; }; static struct command_result *listincoming_done(struct command *cmd, const char *buf, const jsmntok_t *result, struct find_best_peer_data *data) { const jsmntok_t *arr, *t; size_t i; struct chaninfo *best = NULL; arr = json_get_member(buf, result, "incoming"); json_for_each_arr(i, t, arr) { struct chaninfo ci; const jsmntok_t *pftok; u8 *features; const char *err; struct amount_msat feebase; err = json_scan(tmpctx, buf, t, "{id:%," "incoming_capacity_msat:%," "htlc_min_msat:%," "htlc_max_msat:%," "fee_base_msat:%," "fee_proportional_millionths:%," "cltv_expiry_delta:%}", JSON_SCAN(json_to_pubkey, &ci.id), JSON_SCAN(json_to_msat, &ci.capacity), JSON_SCAN(json_to_msat, &ci.htlc_min), JSON_SCAN(json_to_msat, &ci.htlc_max), JSON_SCAN(json_to_msat, &feebase), JSON_SCAN(json_to_u32, &ci.feeppm), JSON_SCAN(json_to_u32, &ci.cltv)); if (err) { plugin_log(cmd->plugin, LOG_BROKEN, "Could not parse listincoming: %s", err); continue; } ci.feebase = feebase.millisatoshis; /* Raw: feebase */ /* Not presented if there's no channel_announcement for peer: * we could use listpeers, but if it's private we probably * don't want to blinded route through it! */ pftok = json_get_member(buf, t, "peer_features"); if (!pftok) continue; features = json_tok_bin_from_hex(tmpctx, buf, pftok); if (!feature_offered(features, data->needed_feature)) continue; if (!best || amount_msat_greater(ci.capacity, best->capacity)) best = tal_dup(tmpctx, struct chaninfo, &ci); } /* Free data if they don't */ tal_steal(tmpctx, data); return data->cb(cmd, best, data->arg); } struct command_result *find_best_peer_(struct command *cmd, int needed_feature, struct command_result *(*cb)(struct command *, const struct chaninfo *, void *), void *arg) { struct out_req *req; struct find_best_peer_data *data = tal(cmd, struct find_best_peer_data); data->cb = cb; data->arg = arg; data->needed_feature = needed_feature; req = jsonrpc_request_start(cmd->plugin, cmd, "listincoming", listincoming_done, forward_error, data); return send_outreq(cmd->plugin, req); } static const struct plugin_hook hooks[] = { { "onion_message_recv", onion_message_recv }, { "onion_message_recv_secret", onion_message_recv }, { "invoice_payment", invoice_payment, }, }; static struct command_result *block_added_notify(struct command *cmd, const char *buf, const jsmntok_t *params) { json_scan(cmd, buf, params, "{block:{height:%}}", JSON_SCAN(json_to_u32, &blockheight)); return notification_handled(cmd); } static const struct plugin_notification notifications[] = { { "block_added", block_added_notify, }, }; struct decodable { const char *type; struct bolt11 *b11; struct tlv_offer *offer; struct tlv_invoice *invoice; struct tlv_invoice_request *invreq; struct rune *rune; u8 *emergency_recover; }; static u8 *encrypted_decode(const tal_t *ctx, const char *str, char **fail) { if (strlen(str) < 8) { *fail = tal_fmt(ctx, "invalid payload"); return NULL; } size_t hrp_maxlen = strlen(str) - 6; char *hrp = tal_arr(ctx, char, hrp_maxlen); size_t data_maxlen = strlen(str) - 8; u5 *data = tal_arr(ctx, u5, data_maxlen); size_t datalen = 0; if (bech32_decode(hrp, data, &datalen, str, (size_t)-1) == BECH32_ENCODING_NONE) { *fail = tal_fmt(ctx, "invalid bech32 encoding"); goto fail; } if (!streq(hrp, "clnemerg")) { *fail = tal_fmt(ctx, "hrp should be `clnemerg`"); goto fail; } u8 *data8bit = tal_arr(data, u8, 0); bech32_pull_bits(&data8bit, data, datalen*5); return data8bit; fail: tal_free(data); return NULL; } static struct command_result *param_decodable(struct command *cmd, const char *name, const char *buffer, const jsmntok_t *token, struct decodable *decodable) { char *likely_fail = NULL, *fail; jsmntok_t tok; /* BOLT #11: * * If a URI scheme is desired, the current recommendation is to either * use 'lightning:' as a prefix before the BOLT-11 encoding */ tok = *token; if (json_tok_startswith(buffer, &tok, "lightning:") || json_tok_startswith(buffer, &tok, "LIGHTNING:")) tok.start += strlen("lightning:"); decodable->offer = offer_decode(cmd, buffer + tok.start, tok.end - tok.start, plugin_feature_set(cmd->plugin), NULL, json_tok_startswith(buffer, &tok, "lno1") ? &likely_fail : &fail); if (decodable->offer) { decodable->type = "bolt12 offer"; return NULL; } decodable->invoice = invoice_decode(cmd, buffer + tok.start, tok.end - tok.start, plugin_feature_set(cmd->plugin), NULL, json_tok_startswith(buffer, &tok, "lni1") ? &likely_fail : &fail); if (decodable->invoice) { decodable->type = "bolt12 invoice"; return NULL; } decodable->invreq = invrequest_decode(cmd, buffer + tok.start, tok.end - tok.start, plugin_feature_set(cmd->plugin), NULL, json_tok_startswith(buffer, &tok, "lnr1") ? &likely_fail : &fail); if (decodable->invreq) { decodable->type = "bolt12 invoice_request"; return NULL; } decodable->emergency_recover = encrypted_decode(cmd, tal_strndup(tmpctx, buffer + tok.start, tok.end - tok.start), json_tok_startswith(buffer, &tok, "clnemerg1") ? &likely_fail : &fail); if (decodable->emergency_recover) { decodable->type = "emergency recover"; return NULL; } /* If no other was likely, bolt11 decoder gives us failure string. */ decodable->b11 = bolt11_decode(cmd, tal_strndup(tmpctx, buffer + tok.start, tok.end - tok.start), plugin_feature_set(cmd->plugin), NULL, NULL, likely_fail ? &fail : &likely_fail); if (decodable->b11) { decodable->type = "bolt11 invoice"; return NULL; } decodable->rune = rune_from_base64n(decodable, buffer + tok.start, tok.end - tok.start); if (decodable->rune) { decodable->type = "rune"; return NULL; } /* Return failure message from most likely parsing candidate */ return command_fail_badparam(cmd, name, buffer, &tok, likely_fail); } static void json_add_chains(struct json_stream *js, const char *fieldname, const struct bitcoin_blkid *chains) { json_array_start(js, fieldname); for (size_t i = 0; i < tal_count(chains); i++) json_add_sha256(js, NULL, &chains[i].shad.sha); json_array_end(js); } static void json_add_onionmsg_path(struct json_stream *js, const char *fieldname, const struct onionmsg_hop *hop) { json_object_start(js, fieldname); json_add_pubkey(js, "blinded_node_id", &hop->blinded_node_id); json_add_hex_talarr(js, "encrypted_recipient_data", hop->encrypted_recipient_data); json_object_end(js); } /* Returns true if valid */ static bool json_add_blinded_paths(struct json_stream *js, const char *fieldname, struct blinded_path **paths, struct blinded_payinfo **blindedpay) { json_array_start(js, fieldname); for (size_t i = 0; i < tal_count(paths); i++) { json_object_start(js, NULL); if (paths[i]->first_node_id.is_pubkey) { json_add_pubkey(js, "first_node_id", &paths[i]->first_node_id.pubkey); } else { json_add_short_channel_id(js, "first_scid", paths[i]->first_node_id.scidd.scid); json_add_u32(js, "first_scid_dir", paths[i]->first_node_id.scidd.dir); } json_add_pubkey(js, "blinding", &paths[i]->blinding); /* Don't crash if we're short a payinfo! */ if (i < tal_count(blindedpay)) { json_object_start(js, "payinfo"); json_add_amount_msat(js, "fee_base_msat", amount_msat(blindedpay[i]->fee_base_msat)); json_add_u32(js, "fee_proportional_millionths", blindedpay[i]->fee_proportional_millionths); json_add_u32(js, "cltv_expiry_delta", blindedpay[i]->cltv_expiry_delta); json_add_hex_talarr(js, "features", blindedpay[i]->features); json_object_end(js); } json_array_start(js, "path"); for (size_t j = 0; j < tal_count(paths[i]->path); j++) { json_add_onionmsg_path(js, NULL, paths[i]->path[j]); } json_array_end(js); json_object_end(js); } json_array_end(js); /* BOLT-offers #12: * - MUST reject the invoice if `invoice_blindedpay` does not contain * exactly one `blinded_payinfo` per `invoice_paths`.`blinded_path`. */ if (blindedpay && tal_count(blindedpay) != tal_count(paths)) { json_add_str_fmt(js, "warning_invalid_invoice_blindedpay", "invoice has %zu blinded_payinfo but %zu paths", tal_count(blindedpay), tal_count(paths)); return false; } /* BOLT-offers #12: * - if `num_hops` is 0 in any `blinded_path` in `offer_paths`: * - MUST NOT respond to the offer. */ for (size_t i = 0; i < tal_count(paths); i++) { if (tal_count(paths[i]->path) == 0) { json_add_str_fmt(js, "warning_empty_blinded_path", "blinded path %zu has 0 hops", i); return false; } } return true; } static const char *recurrence_time_unit_name(u8 time_unit) { /* BOLT-offers-recurrence #12: * `time_unit` defining 0 (seconds), 1 (days), 2 (months), 3 (years). */ switch (time_unit) { case 0: return "seconds"; case 1: return "days"; case 2: return "months"; case 3: return "years"; } return NULL; } static bool json_add_utf8(struct json_stream *js, const char *fieldname, const char *utf8str) { if (utf8_check(utf8str, tal_bytelen(utf8str))) { json_add_stringn(js, fieldname, utf8str, tal_bytelen(utf8str)); return true; } json_add_string(js, tal_fmt(tmpctx, "warning_invalid_%s", fieldname), "invalid UTF8"); return false; } static bool json_add_offer_fields(struct json_stream *js, const struct bitcoin_blkid *offer_chains, const u8 *offer_metadata, const char *offer_currency, const u64 *offer_amount, const char *offer_description, const u8 *offer_features, const u64 *offer_absolute_expiry, struct blinded_path **offer_paths, const char *offer_issuer, const u64 *offer_quantity_max, const struct pubkey *offer_issuer_id, const struct recurrence *offer_recurrence, const struct recurrence_paywindow *offer_recurrence_paywindow, const u32 *offer_recurrence_limit, const struct recurrence_base *offer_recurrence_base) { bool valid = true; if (offer_chains) json_add_chains(js, "offer_chains", offer_chains); if (offer_metadata) json_add_hex_talarr(js, "offer_metadata", offer_metadata); if (offer_currency) { const struct iso4217_name_and_divisor *iso4217; valid &= json_add_utf8(js, "offer_currency", offer_currency); if (offer_amount) json_add_u64(js, "offer_amount", *offer_amount); iso4217 = find_iso4217(offer_currency, tal_bytelen(offer_currency)); if (iso4217) json_add_num(js, "currency_minor_unit", iso4217->minor_unit); else json_add_string(js, "warning_unknown_offer_currency", "unknown currency code"); } else if (offer_amount) json_add_amount_msat(js, "offer_amount_msat", amount_msat(*offer_amount)); /* BOLT-offers #12: * * - if `offer_amount` is set and `offer_description` is not set: * - MUST NOT respond to the offer. */ if (offer_description) valid &= json_add_utf8(js, "offer_description", offer_description); else if (!offer_description && offer_amount) { json_add_string(js, "warning_missing_offer_description", "description is required if offer_amount is set (for the user to know what it was they paid for)"); valid = false; } if (offer_issuer) valid &= json_add_utf8(js, "offer_issuer", offer_issuer); if (offer_features) json_add_hex_talarr(js, "offer_features", offer_features); if (offer_absolute_expiry) json_add_u64(js, "offer_absolute_expiry", *offer_absolute_expiry); if (offer_paths) valid &= json_add_blinded_paths(js, "offer_paths", offer_paths, NULL); if (offer_quantity_max) json_add_u64(js, "offer_quantity_max", *offer_quantity_max); if (offer_recurrence) { const char *name; json_object_start(js, "offer_recurrence"); json_add_num(js, "time_unit", offer_recurrence->time_unit); name = recurrence_time_unit_name(offer_recurrence->time_unit); if (name) json_add_string(js, "time_unit_name", name); json_add_num(js, "period", offer_recurrence->period); if (offer_recurrence_base) { json_add_u64(js, "basetime", offer_recurrence_base->basetime); if (offer_recurrence_base->start_any_period) json_add_bool(js, "start_any_period", true); } if (offer_recurrence_limit) json_add_u32(js, "limit", *offer_recurrence_limit); if (offer_recurrence_paywindow) { json_object_start(js, "paywindow"); json_add_u32(js, "seconds_before", offer_recurrence_paywindow->seconds_before); json_add_u32(js, "seconds_after", offer_recurrence_paywindow->seconds_after); if (offer_recurrence_paywindow->proportional_amount) json_add_bool(js, "proportional_amount", true); json_object_end(js); } json_object_end(js); } if (offer_issuer_id) json_add_pubkey(js, "offer_issuer_id", offer_issuer_id); return valid; } static void json_add_extra_fields(struct json_stream *js, const char *fieldname, const struct tlv_field *fields) { bool have_extra = false; for (size_t i = 0; i < tal_count(fields); i++) { if (fields[i].meta) continue; if (!have_extra) { json_array_start(js, fieldname); have_extra = true; } json_object_start(js, NULL); json_add_u64(js, "type", fields[i].numtype); json_add_u64(js, "length", fields[i].length); json_add_hex(js, "value", fields[i].value, fields[i].length); json_object_end(js); } if (have_extra) json_array_end(js); } static void json_add_offer(struct json_stream *js, const struct tlv_offer *offer) { struct sha256 offer_id; bool valid = true; offer_offer_id(offer, &offer_id); json_add_sha256(js, "offer_id", &offer_id); valid &= json_add_offer_fields(js, offer->offer_chains, offer->offer_metadata, offer->offer_currency, offer->offer_amount, offer->offer_description, offer->offer_features, offer->offer_absolute_expiry, offer->offer_paths, offer->offer_issuer, offer->offer_quantity_max, offer->offer_issuer_id, offer->offer_recurrence, offer->offer_recurrence_paywindow, offer->offer_recurrence_limit, offer->offer_recurrence_base); /* BOLT-offers #12: * - if neither `offer_issuer_id` nor `offer_paths` are set: * - MUST NOT respond to the offer. */ if (!offer->offer_issuer_id && !offer->offer_paths) { json_add_string(js, "warning_missing_offer_issuer_id", "offers without an issuer_id or paths are invalid"); valid = false; } json_add_extra_fields(js, "unknown_offer_tlvs", offer->fields); json_add_bool(js, "valid", valid); } static bool json_add_invreq_fields(struct json_stream *js, const u8 *invreq_metadata, const struct bitcoin_blkid *invreq_chain, const u64 *invreq_amount, const u8 *invreq_features, const u64 *invreq_quantity, const struct pubkey *invreq_payer_id, const utf8 *invreq_payer_note, struct blinded_path **invreq_paths, const u32 *invreq_recurrence_counter, const u32 *invreq_recurrence_start) { bool valid = true; /* BOLT-offers #12: * - MUST fail the request if `invreq_payer_id` or `invreq_metadata` are not present. */ if (invreq_metadata) json_add_hex_talarr(js, "invreq_metadata", invreq_metadata); else { json_add_string(js, "warning_missing_invreq_metadata", "invreq_metadata required"); valid = false; } /* This can be missing for an invoice though! */ if (invreq_payer_id) json_add_pubkey(js, "invreq_payer_id", invreq_payer_id); if (invreq_chain) json_add_sha256(js, "invreq_chain", &invreq_chain->shad.sha); if (invreq_amount) json_add_amount_msat(js, "invreq_amount_msat", amount_msat(*invreq_amount)); if (invreq_features) json_add_hex_talarr(js, "invreq_features", invreq_features); if (invreq_quantity) json_add_u64(js, "invreq_quantity", *invreq_quantity); if (invreq_payer_note) valid &= json_add_utf8(js, "invreq_payer_note", invreq_payer_note); if (invreq_paths) valid &= json_add_blinded_paths(js, "invreq_paths", invreq_paths, NULL); if (invreq_recurrence_counter) { json_add_u32(js, "invreq_recurrence_counter", *invreq_recurrence_counter); if (invreq_recurrence_start) json_add_u32(js, "invreq_recurrence_start", *invreq_recurrence_start); } return valid; } /* Returns true if valid */ static bool json_add_fallback_address(struct json_stream *js, const struct chainparams *chain, u8 version, const u8 *address) { char out[73 + strlen(chain->onchain_hrp)]; /* Does extra checks, in particular checks v0 sizes */ if (segwit_addr_encode(out, chain->onchain_hrp, version, address, tal_bytelen(address))) { json_add_string(js, "address", out); return true; } json_add_string(js, "warning_invalid_invoice_fallbacks_address", "invalid fallback address for this version"); return false; } /* Returns true if valid */ static bool json_add_fallbacks(struct json_stream *js, const struct bitcoin_blkid *chains, struct fallback_address **fallbacks) { const struct chainparams *chain; bool valid = true; /* Present address as first chain mentioned. */ if (tal_count(chains) != 0) chain = chainparams_by_chainhash(&chains[0]); else chain = chainparams_for_network("bitcoin"); json_array_start(js, "invoice_fallbacks"); for (size_t i = 0; i < tal_count(fallbacks); i++) { size_t addrlen = tal_bytelen(fallbacks[i]->address); json_object_start(js, NULL); json_add_u32(js, "version", fallbacks[i]->version); json_add_hex_talarr(js, "hex", fallbacks[i]->address); /* BOLT-offers #12: * - for the bitcoin chain, if the invoice specifies `invoice_fallbacks`: * - MUST ignore any `fallback_address` for which `version` is * greater than 16. * - MUST ignore any `fallback_address` for which `address` is * less than 2 or greater than 40 bytes. * - MUST ignore any `fallback_address` for which `address` does * not meet known requirements for the given `version` */ if (fallbacks[i]->version > 16) { json_add_string(js, "warning_invalid_invoice_fallbacks_version", "invoice fallback version > 16"); valid = false; } else if (addrlen < 2 || addrlen > 40) { json_add_string(js, "warning_invalid_invoice_fallbacks_address", "invoice fallback address bad length"); valid = false; } else if (chain) { valid &= json_add_fallback_address(js, chain, fallbacks[i]->version, fallbacks[i]->address); } json_object_end(js); } json_array_end(js); return valid; } static void json_add_invoice_request(struct json_stream *js, const struct tlv_invoice_request *invreq) { bool valid = true; /* If there's an offer_issuer_id or offer_paths, then there's an offer. */ if (invreq->offer_issuer_id || invreq->offer_paths) { struct sha256 offer_id; invreq_offer_id(invreq, &offer_id); json_add_sha256(js, "offer_id", &offer_id); } valid &= json_add_offer_fields(js, invreq->offer_chains, invreq->offer_metadata, invreq->offer_currency, invreq->offer_amount, invreq->offer_description, invreq->offer_features, invreq->offer_absolute_expiry, invreq->offer_paths, invreq->offer_issuer, invreq->offer_quantity_max, invreq->offer_issuer_id, invreq->offer_recurrence, invreq->offer_recurrence_paywindow, invreq->offer_recurrence_limit, invreq->offer_recurrence_base); valid &= json_add_invreq_fields(js, invreq->invreq_metadata, invreq->invreq_chain, invreq->invreq_amount, invreq->invreq_features, invreq->invreq_quantity, invreq->invreq_payer_id, invreq->invreq_payer_note, invreq->invreq_paths, invreq->invreq_recurrence_counter, invreq->invreq_recurrence_start); /* BOLT-offers #12: * - MUST fail the request if `invreq_payer_id` or `invreq_metadata` are not present. */ if (!invreq->invreq_payer_id) { json_add_string(js, "warning_missing_invreq_payer_id", "invreq_payer_id required"); valid = false; } /* BOLT-offers #12: * - MUST fail the request if `signature` is not correct as detailed * in [Signature Calculation](#signature-calculation) using the * `invreq_payer_id`. */ if (invreq->signature) { if (invreq->invreq_payer_id && !bolt12_check_signature(invreq->fields, "invoice_request", "signature", invreq->invreq_payer_id, invreq->signature)) { json_add_string(js, "warning_invalid_invoice_request_signature", "Bad signature"); valid = false; } else { json_add_bip340sig(js, "signature", invreq->signature); } } else { json_add_string(js, "warning_missing_invoice_request_signature", "Missing signature"); valid = false; } json_add_extra_fields(js, "unknown_invoice_request_tlvs", invreq->fields); json_add_bool(js, "valid", valid); } static void json_add_b12_invoice(struct json_stream *js, const struct tlv_invoice *invoice) { bool valid = true; /* If there's an offer_issuer_id or offer_paths, then there's an offer. */ if (invoice->offer_issuer_id || invoice->offer_paths) { struct sha256 offer_id; invoice_offer_id(invoice, &offer_id); json_add_sha256(js, "offer_id", &offer_id); } valid &= json_add_offer_fields(js, invoice->offer_chains, invoice->offer_metadata, invoice->offer_currency, invoice->offer_amount, invoice->offer_description, invoice->offer_features, invoice->offer_absolute_expiry, invoice->offer_paths, invoice->offer_issuer, invoice->offer_quantity_max, invoice->offer_issuer_id, invoice->offer_recurrence, invoice->offer_recurrence_paywindow, invoice->offer_recurrence_limit, invoice->offer_recurrence_base); valid &= json_add_invreq_fields(js, invoice->invreq_metadata, invoice->invreq_chain, invoice->invreq_amount, invoice->invreq_features, invoice->invreq_quantity, invoice->invreq_payer_id, invoice->invreq_payer_note, invoice->invreq_paths, invoice->invreq_recurrence_counter, invoice->invreq_recurrence_start); /* BOLT-offers #12: * - MUST reject the invoice if `invoice_paths` is not present * or is empty. * - MUST reject the invoice if `num_hops` is 0 in any `blinded_path` in `invoice_paths`. * - MUST reject the invoice if `invoice_blindedpay` is not present. * - MUST reject the invoice if `invoice_blindedpay` does not contain * exactly one `blinded_payinfo` per `invoice_paths`.`blinded_path`. */ if (invoice->invoice_paths) { if (!invoice->invoice_blindedpay) { json_add_string(js, "warning_missing_invoice_blindedpay", "invoices with paths without blindedpay are invalid"); valid = false; } valid &= json_add_blinded_paths(js, "invoice_paths", invoice->invoice_paths, invoice->invoice_blindedpay); } else { json_add_string(js, "warning_missing_invoice_paths", "invoices without a invoice_paths are invalid"); valid = false; } if (invoice->invoice_created_at) { json_add_u64(js, "invoice_created_at", *invoice->invoice_created_at); } else { json_add_string(js, "warning_missing_invoice_created_at", "invoices without created_at are invalid"); valid = false; } /* BOLT-offers #12: * * - if `invoice_relative_expiry` is present: * - MUST reject the invoice if the current time since 1970-01-01 UTC * is greater than `invoice_created_at` plus `seconds_from_creation`. * - otherwise: * - MUST reject the invoice if the current time since 1970-01-01 UTC * is greater than `invoice_created_at` plus 7200. */ if (invoice->invoice_relative_expiry) json_add_u32(js, "invoice_relative_expiry", *invoice->invoice_relative_expiry); else json_add_u32(js, "invoice_relative_expiry", BOLT12_DEFAULT_REL_EXPIRY); if (invoice->invoice_payment_hash) json_add_sha256(js, "invoice_payment_hash", invoice->invoice_payment_hash); else { json_add_string(js, "warning_missing_invoice_payment_hash", "invoices without a payment_hash are invalid"); valid = false; } /* BOLT-offers #12: * - MUST reject the invoice if `invoice_amount` is not present. */ if (invoice->invoice_amount) json_add_amount_msat(js, "invoice_amount_msat", amount_msat(*invoice->invoice_amount)); else { json_add_string(js, "warning_missing_invoice_amount", "invoices without an amount are invalid"); valid = false; } if (invoice->invoice_fallbacks) valid &= json_add_fallbacks(js, invoice->invreq_chain, invoice->invoice_fallbacks); if (invoice->invoice_features) json_add_hex_talarr(js, "features", invoice->invoice_features); if (invoice->invoice_node_id) json_add_pubkey(js, "invoice_node_id", invoice->invoice_node_id); else { json_add_string(js, "warning_missing_invoice_node_id", "invoices without an invoice_node_id are invalid"); valid = false; } /* BOLT-offers-recurrence #12: * - if the offer contained `recurrence`: * - MUST reject the invoice if `recurrence_basetime` is not * set. */ if (invoice->offer_recurrence) { if (invoice->invoice_recurrence_basetime) json_add_u64(js, "invoice_recurrence_basetime", *invoice->invoice_recurrence_basetime); else { json_add_string(js, "warning_missing_invoice_recurrence_basetime", "recurring invoices without a recurrence_basetime are invalid"); valid = false; } } /* invoice_decode checked this */ json_add_bip340sig(js, "signature", invoice->signature); json_add_extra_fields(js, "unknown_invoice_tlvs", invoice->fields); json_add_bool(js, "valid", valid); } static void json_add_rune(struct command *cmd, struct json_stream *js, const struct rune *rune) { const char *string; /* Simplest to check everything for UTF-8 compliance at once. * Since separators are | and & (which cannot appear inside * UTF-8 multichars), if the entire thing is valid UTF-8 then * each part is. */ string = rune_to_string(tmpctx, rune); if (!utf8_check(string, strlen(string))) { json_add_hex(js, "hex", string, strlen(string)); json_add_string(js, "warning_rune_invalid_utf8", "Rune contains invalid UTF-8 strings"); json_add_bool(js, "valid", false); return; } if (rune->unique_id) json_add_string(js, "unique_id", rune->unique_id); if (rune->version) json_add_string(js, "version", rune->version); json_add_string(js, "string", take(string)); json_array_start(js, "restrictions"); for (size_t i = rune->unique_id ? 1 : 0; i < tal_count(rune->restrs); i++) { const struct rune_restr *restr = rune->restrs[i]; char *summary = tal_strdup(tmpctx, ""); const char *sep = ""; json_object_start(js, NULL); json_array_start(js, "alternatives"); for (size_t j = 0; j < tal_count(restr->alterns); j++) { const struct rune_altern *alt = restr->alterns[j]; const char *annotation, *value; bool int_val = false, time_val = false; if (streq(alt->fieldname, "time")) { annotation = "in seconds since 1970"; time_val = true; } else if (streq(alt->fieldname, "id")) annotation = "of commanding peer"; else if (streq(alt->fieldname, "method")) annotation = "of command"; else if (streq(alt->fieldname, "pnum")) { annotation = "number of command parameters"; int_val = true; } else if (streq(alt->fieldname, "rate")) { annotation = "max per minute"; int_val = true; } else if (strstarts(alt->fieldname, "parr")) { annotation = tal_fmt(tmpctx, "array parameter #%s", alt->fieldname+4); } else if (strstarts(alt->fieldname, "pname")) annotation = tal_fmt(tmpctx, "object parameter '%s'", alt->fieldname+5); else annotation = "unknown condition?"; tal_append_fmt(&summary, "%s", sep); /* Where it's ambiguous, quote if it's not treated as an int */ if (int_val) value = alt->value; else if (time_val) { u64 t = atol(alt->value); if (t) { u64 diff, now = time_now().ts.tv_sec; /* Need a non-const during construction */ char *v; if (now > t) diff = now - t; else diff = t - now; if (diff < 60) v = tal_fmt(tmpctx, "%"PRIu64" seconds", diff); else if (diff < 60 * 60) v = tal_fmt(tmpctx, "%"PRIu64" minutes %"PRIu64" seconds", diff / 60, diff % 60); else { v = tal_strdup(tmpctx, "approximately "); /* diff is in minutes */ diff /= 60; if (diff < 48 * 60) tal_append_fmt(&v, "%"PRIu64" hours %"PRIu64" minutes", diff / 60, diff % 60); else { /* hours */ diff /= 60; if (diff < 60 * 24) tal_append_fmt(&v, "%"PRIu64" days %"PRIu64" hours", diff / 24, diff % 24); else { /* days */ diff /= 24; if (diff < 365 * 2) tal_append_fmt(&v, "%"PRIu64" months %"PRIu64" days", diff / 30, diff % 30); else { /* months */ diff /= 30; tal_append_fmt(&v, "%"PRIu64" years %"PRIu64" months", diff / 12, diff % 12); } } } } if (now > t) tal_append_fmt(&v, " ago"); else tal_append_fmt(&v, " from now"); value = tal_fmt(tmpctx, "%s (%s)", alt->value, v); } else value = alt->value; } else value = tal_fmt(tmpctx, "'%s'", alt->value); switch (alt->condition) { case RUNE_COND_IF_MISSING: tal_append_fmt(&summary, "%s (%s) is missing", alt->fieldname, annotation); break; case RUNE_COND_EQUAL: tal_append_fmt(&summary, "%s (%s) equal to %s", alt->fieldname, annotation, value); break; case RUNE_COND_NOT_EQUAL: tal_append_fmt(&summary, "%s (%s) unequal to %s", alt->fieldname, annotation, value); break; case RUNE_COND_BEGINS: tal_append_fmt(&summary, "%s (%s) starts with '%s'", alt->fieldname, annotation, alt->value); break; case RUNE_COND_ENDS: tal_append_fmt(&summary, "%s (%s) ends with '%s'", alt->fieldname, annotation, alt->value); break; case RUNE_COND_CONTAINS: tal_append_fmt(&summary, "%s (%s) contains '%s'", alt->fieldname, annotation, alt->value); break; case RUNE_COND_INT_LESS: tal_append_fmt(&summary, "%s (%s) less than %s", alt->fieldname, annotation, time_val ? value : alt->value); break; case RUNE_COND_INT_GREATER: tal_append_fmt(&summary, "%s (%s) greater than %s", alt->fieldname, annotation, time_val ? value : alt->value); break; case RUNE_COND_LEXO_BEFORE: tal_append_fmt(&summary, "%s (%s) sorts before '%s'", alt->fieldname, annotation, alt->value); break; case RUNE_COND_LEXO_AFTER: tal_append_fmt(&summary, "%s (%s) sorts after '%s'", alt->fieldname, annotation, alt->value); break; case RUNE_COND_COMMENT: tal_append_fmt(&summary, "[comment: %s%s]", alt->fieldname, alt->value); break; } sep = " OR "; json_add_str_fmt(js, NULL, "%s%c%s", alt->fieldname, alt->condition, alt->value); } json_array_end(js); json_add_string(js, "summary", summary); json_object_end(js); } json_array_end(js); /* FIXME: do some sanity checks? */ json_add_bool(js, "valid", true); } static struct command_result *after_makesecret(struct command *cmd, const char *buf, const jsmntok_t *result, struct decodable *decodable) { struct secret secret; struct json_stream *response; const jsmntok_t *secrettok; secrettok = json_get_member(buf, result, "secret"); json_to_secret(buf, secrettok, &secret); crypto_secretstream_xchacha20poly1305_state crypto_state; if (tal_bytelen(decodable->emergency_recover) < ABYTES + HEADER_LEN) return command_fail(cmd, JSONRPC2_INVALID_PARAMS, "Can't decrypt, hex is too short!"); u8 *decrypt_blob = tal_arr(tmpctx, u8, tal_bytelen(decodable->emergency_recover) - ABYTES - HEADER_LEN); /* The header part */ if (crypto_secretstream_xchacha20poly1305_init_pull(&crypto_state, decodable->emergency_recover, secret.data) != 0) { return command_fail(cmd, JSONRPC2_INVALID_PARAMS, "Can't decrypt!"); } if (crypto_secretstream_xchacha20poly1305_pull(&crypto_state, decrypt_blob, NULL, 0, decodable->emergency_recover + HEADER_LEN, tal_bytelen(decodable->emergency_recover) - HEADER_LEN, NULL, 0) != 0) { return command_fail(cmd, JSONRPC2_INVALID_PARAMS, "Can't decrypt!"); } response = jsonrpc_stream_success(cmd); json_add_bool(response, "valid", true); json_add_string(response, "type", decodable->type); json_add_hex(response, "decrypted", decrypt_blob, tal_bytelen(decrypt_blob)); return command_finished(cmd, response); } static struct command_result *json_decode(struct command *cmd, const char *buffer, const jsmntok_t *params) { struct decodable *decodable = talz(cmd, struct decodable); struct json_stream *response; if (!param(cmd, buffer, params, p_req("string", param_decodable, decodable), NULL)) return command_param_failed(); response = jsonrpc_stream_success(cmd); json_add_string(response, "type", decodable->type); if (decodable->offer) json_add_offer(response, decodable->offer); if (decodable->invreq) json_add_invoice_request(response, decodable->invreq); if (decodable->invoice) json_add_b12_invoice(response, decodable->invoice); if (decodable->b11) { /* The bolt11 decoder simply refuses to decode bad invs. */ json_add_bolt11(response, decodable->b11); json_add_bool(response, "valid", true); } if (decodable->rune) json_add_rune(cmd, response, decodable->rune); if (decodable->emergency_recover) { struct out_req *req; req = jsonrpc_request_start(cmd->plugin, cmd, "makesecret", after_makesecret, &forward_error, decodable); json_add_string(req->js, "string", "scb secret"); return send_outreq(cmd->plugin, req); } return command_finished(cmd, response); } static const char *init(struct plugin *p, const char *buf UNUSED, const jsmntok_t *config UNUSED) { rpc_scan(p, "getinfo", take(json_out_obj(NULL, NULL, NULL)), "{id:%}", JSON_SCAN(json_to_pubkey, &id)); rpc_scan(p, "getchaininfo", take(json_out_obj(NULL, "last_height", NULL)), "{headercount:%}", JSON_SCAN(json_to_u32, &blockheight)); rpc_scan(p, "listconfigs", take(json_out_obj(NULL, NULL, NULL)), "{configs:" "{cltv-final:{value_int:%}," "experimental-offers:{set:%}}}", JSON_SCAN(json_to_u16, &cltv_final), JSON_SCAN(json_to_bool, &offers_enabled)); rpc_scan(p, "makesecret", take(json_out_obj(NULL, "string", BOLT12_ID_BASE_STRING)), "{secret:%}", JSON_SCAN(json_to_secret, &invoicesecret_base)); rpc_scan(p, "makesecret", take(json_out_obj(NULL, "string", "offer-blinded-path")), "{secret:%}", JSON_SCAN(json_to_secret, &offerblinding_base)); rpc_scan(p, "makesecret", take(json_out_obj(NULL, "string", NODE_ALIAS_BASE_STRING)), "{secret:%}", JSON_SCAN(json_to_secret, &nodealias_base)); return NULL; } static const struct plugin_command commands[] = { { "offer", json_offer }, { "invoicerequest", json_invoicerequest }, { "decode", json_decode, }, { "fetchinvoice", json_fetchinvoice, }, { "sendinvoice", json_sendinvoice, }, { "dev-rawrequest", json_dev_rawrequest, .dev_only = true, }, }; static char *scid_option(struct plugin *plugin, const char *arg, bool check_only, struct short_channel_id **scidp) { struct short_channel_id scid; if (!short_channel_id_from_str(arg, strlen(arg), &scid)) return tal_fmt(tmpctx, "'%s' is not an scid", arg); *scidp = notleak(tal_dup(plugin, struct short_channel_id, &scid)); return NULL; } static bool scid_jsonfmt(struct plugin *plugin, struct json_stream *js, const char *fieldname, struct short_channel_id **scid) { if (!*scid) return false; json_add_short_channel_id(js, fieldname, **scid); return true; } int main(int argc, char *argv[]) { setup_locale(); /* We deal in UTC; mktime() uses local time */ setenv("TZ", "", 1); plugin_main(argv, init, NULL, PLUGIN_RESTARTABLE, true, NULL, commands, ARRAY_SIZE(commands), notifications, ARRAY_SIZE(notifications), hooks, ARRAY_SIZE(hooks), NULL, 0, plugin_option("fetchinvoice-noconnect", "flag", "Don't try to connect directly to fetch/pay an invoice.", flag_option, flag_jsonfmt, &disable_connect), plugin_option_dev("dev-invoice-bpath-scid", "flag", "Use short_channel_id instead of pubkey when creating a blinded payment path", flag_option, flag_jsonfmt, &dev_invoice_bpath_scid), plugin_option_dev("dev-invoice-internal-scid", "string", "Use short_channel_id instead of pubkey when creating a blinded payment path", scid_option, scid_jsonfmt, &dev_invoice_internal_scid), NULL); }