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#include <bitcoin/chainparams.h>
#include <ccan/array_size/array_size.h>
#include <common/bolt12.h>
#include <common/iso4217.h>
#include <common/json_stream.h>
#include <common/overflows.h>
#include <plugins/offers_offer.h>
#include <wire/onion_wire.h>
static bool msat_or_any(const char *buffer,
const jsmntok_t *tok,
struct tlv_offer *offer)
{
struct amount_msat msat;
if (json_tok_streq(buffer, tok, "any"))
return true;
if (!parse_amount_msat(&msat,
buffer + tok->start, tok->end - tok->start))
return false;
offer->amount = tal_dup(offer, u64,
&msat.millisatoshis); /* Raw: other currencies */
return true;
}
static struct command_result *param_msat_or_any(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct tlv_offer *offer)
{
if (msat_or_any(buffer, tok, offer))
return NULL;
return command_fail_badparam(cmd, name, buffer, tok,
"should be 'any' or msatoshis");
}
static struct command_result *param_amount(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct tlv_offer *offer)
{
const struct iso4217_name_and_divisor *isocode;
jsmntok_t number, whole, frac;
u64 cents;
if (msat_or_any(buffer, tok, offer))
return NULL;
offer->amount = tal(offer, u64);
/* BOLT-offers #12:
*
* - MUST specify `iso4217` as an ISO 4712 three-letter code.
* - MUST specify `amount` in the currency unit adjusted by the ISO 4712
* exponent (e.g. USD cents).
*/
if (tok->end - tok->start < ISO4217_NAMELEN)
return command_fail_badparam(cmd, name, buffer, tok,
"should be 'any', msatoshis or <amount>[.<amount>]<ISO-4712>");
isocode = find_iso4217(buffer + tok->end - ISO4217_NAMELEN, ISO4217_NAMELEN);
if (!isocode)
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"Unknown currency suffix %.*s",
ISO4217_NAMELEN,
buffer + tok->end - ISO4217_NAMELEN);
offer->currency
= tal_dup_arr(offer, utf8, isocode->name, ISO4217_NAMELEN, 0);
number = *tok;
number.end -= ISO4217_NAMELEN;
if (!split_tok(buffer, &number, '.', &whole, &frac)) {
whole = number;
cents = 0;
} else {
if (frac.end - frac.start != isocode->minor_unit)
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"Currency %s requires %u minor units",
isocode->name, isocode->minor_unit);
if (!json_to_u64(buffer, &frac, &cents))
return command_fail_badparam(cmd, name, buffer,
&number,
"Bad minor units");
}
if (!json_to_u64(buffer, &whole, offer->amount))
return command_fail_badparam(cmd, name, buffer, tok,
"should be 'any', msatoshis or <ISO-4712><amount>[.<amount>]");
for (size_t i = 0; i < isocode->minor_unit; i++) {
if (mul_overflows_u64(*offer->amount, 10))
return command_fail_badparam(cmd, name, buffer,
&whole,
"excessively large value");
*offer->amount *= 10;
}
*offer->amount += cents;
return NULL;
}
/* BOLT 13:
* - MUST set `time_unit` to 0 (seconds), 1 (days), 2 (months), 3 (years).
*/
struct time_string {
const char *suffix;
u32 unit;
u64 mul;
};
static const struct time_string *json_to_time(const char *buffer,
const jsmntok_t *tok,
u32 *mul)
{
static const struct time_string suffixes[] = {
{ "second", 0, 1 },
{ "seconds", 0, 1 },
{ "minute", 0, 60 },
{ "minutes", 0, 60 },
{ "hour", 0, 60*60 },
{ "hours", 0, 60*60 },
{ "day", 1, 1 },
{ "days", 1, 1 },
{ "week", 1, 7 },
{ "weeks", 1, 7 },
{ "month", 2, 1 },
{ "months", 2, 1 },
{ "year", 3, 1 },
{ "years", 3, 1 },
};
for (size_t i = 0; i < ARRAY_SIZE(suffixes); i++) {
if (json_tok_endswith(buffer, tok, suffixes[i].suffix)) {
jsmntok_t t = *tok;
t.end -= strlen(suffixes[i].suffix);
if (!json_to_u32(buffer, &t, mul))
return NULL;
return suffixes + i;
}
}
return NULL;
}
static struct command_result *param_recurrence(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct tlv_offer_recurrence
**recurrence)
{
u32 mul;
const struct time_string *ts;
ts = json_to_time(buffer, tok, &mul);
if (!ts)
return command_fail_badparam(cmd, name, buffer, tok,
"not a valid time");
*recurrence = tal(cmd, struct tlv_offer_recurrence);
(*recurrence)->time_unit = ts->unit;
(*recurrence)->period = ts->mul * mul;
return NULL;
}
static struct command_result *param_recurrence_base(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct tlv_offer_recurrence_base **base)
{
/* Make copy so we can manipulate it */
jsmntok_t t = *tok;
*base = tal(cmd, struct tlv_offer_recurrence_base);
if (json_tok_startswith(buffer, &t, "@")) {
t.start++;
(*base)->start_any_period = false;
} else
(*base)->start_any_period = true;
if (!json_to_u64(buffer, &t, &(*base)->basetime))
return command_fail_badparam(cmd, name, buffer, tok,
"not a valid basetime or @basetime");
return NULL;
}
/* -time+time[%] */
static struct command_result *param_recurrence_paywindow(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct tlv_offer_recurrence_paywindow
**paywindow)
{
jsmntok_t t, before, after;
*paywindow = tal(cmd, struct tlv_offer_recurrence_paywindow);
t = *tok;
if (json_tok_endswith(buffer, &t, "%")) {
(*paywindow)->proportional_amount = true;
t.end--;
} else
(*paywindow)->proportional_amount = false;
if (!json_tok_startswith(buffer, &t, "-"))
return command_fail_badparam(cmd, name, buffer, tok,
"expected -time+time[%]");
t.start++;
if (!split_tok(buffer, &t, '+', &before, &after))
return command_fail_badparam(cmd, name, buffer, tok,
"expected -time+time[%]");
if (!json_to_u32(buffer, &before, &(*paywindow)->seconds_before))
return command_fail_badparam(cmd, name, buffer, &before,
"expected number of seconds");
if (!json_to_u32(buffer, &after, &(*paywindow)->seconds_after))
return command_fail_badparam(cmd, name, buffer, &after,
"expected number of seconds");
return NULL;
}
static struct command_result *param_invoice_payment_hash(struct command *cmd,
const char *name,
const char *buffer,
const jsmntok_t *tok,
struct sha256 **hash)
{
struct tlv_invoice *inv;
char *fail;
inv = invoice_decode(tmpctx, buffer + tok->start, tok->end - tok->start,
plugin_feature_set(cmd->plugin), chainparams,
&fail);
if (!inv)
return command_fail_badparam(cmd, name, buffer, tok,
tal_fmt(cmd,
"Unparsable invoice: %s",
fail));
if (!inv->payment_hash)
return command_fail_badparam(cmd, name, buffer, tok,
"invoice missing payment_hash");
*hash = tal_steal(cmd, inv->payment_hash);
return NULL;
}
struct offer_info {
const struct tlv_offer *offer;
const char *label;
bool *single_use;
};
static struct command_result *create_offer(struct command *cmd,
struct offer_info *offinfo)
{
struct out_req *req;
/* We simply pass this through. */
req = jsonrpc_request_start(cmd->plugin, cmd, "createoffer",
forward_result, forward_error,
offinfo);
json_add_string(req->js, "bolt12",
offer_encode(tmpctx, offinfo->offer));
if (offinfo->label)
json_add_string(req->js, "label", offinfo->label);
json_add_bool(req->js, "single_use", *offinfo->single_use);
return send_outreq(cmd->plugin, req);
}
static struct command_result *currency_done(struct command *cmd,
const char *buf,
const jsmntok_t *result,
struct offer_info *offinfo)
{
/* Fail in this case, by forwarding warnings. */
if (!json_get_member(buf, result, "msat"))
return forward_error(cmd, buf, result, offinfo);
return create_offer(cmd, offinfo);
}
struct command_result *json_offer(struct command *cmd,
const char *buffer,
const jsmntok_t *params)
{
const char *desc, *vendor;
struct tlv_offer *offer;
struct offer_info *offinfo = tal(cmd, struct offer_info);
offinfo->offer = offer = tlv_offer_new(offinfo);
if (!param(cmd, buffer, params,
p_req("amount", param_amount, offer),
p_req("description", param_escaped_string, &desc),
p_opt("vendor", param_escaped_string, &vendor),
p_opt("label", param_escaped_string, &offinfo->label),
p_opt("quantity_min", param_u64, &offer->quantity_min),
p_opt("quantity_max", param_u64, &offer->quantity_max),
p_opt("absolute_expiry", param_u64, &offer->absolute_expiry),
p_opt("recurrence", param_recurrence, &offer->recurrence),
p_opt("recurrence_base",
param_recurrence_base,
&offer->recurrence_base),
p_opt("recurrence_paywindow",
param_recurrence_paywindow,
&offer->recurrence_paywindow),
p_opt("recurrence_limit",
param_number,
&offer->recurrence_limit),
p_opt_def("single_use", param_bool,
&offinfo->single_use, false),
/* FIXME: hints support! */
NULL))
return command_param_failed();
/* BOLT-offers #12:
*
* - if the chain for the invoice is not solely bitcoin:
* - MUST specify `chains` the offer is valid for.
* - otherwise:
* - the bitcoin chain is implied as the first and only entry.
*/
if (!streq(chainparams->network_name, "bitcoin")) {
offer->chains = tal_arr(offer, struct bitcoin_blkid, 1);
offer->chains[0] = chainparams->genesis_blockhash;
}
if (!offer->recurrence) {
if (offer->recurrence_limit)
return command_fail_badparam(cmd, "recurrence_limit",
buffer, params,
"needs recurrence");
if (offer->recurrence_base)
return command_fail_badparam(cmd, "recurrence_base",
buffer, params,
"needs recurrence");
if (offer->recurrence_paywindow)
return command_fail_badparam(cmd, "recurrence_paywindow",
buffer, params,
"needs recurrence");
}
offer->description = tal_dup_arr(offer, char, desc, strlen(desc), 0);
if (vendor) {
offer->vendor
= tal_dup_arr(offer, char, vendor, strlen(vendor), 0);
}
offer->node_id = tal_dup(offer, struct pubkey32, &id);
/* If they specify a different currency, warn if we can't
* convert it! */
if (offer->currency) {
struct out_req *req;
req = jsonrpc_request_start(cmd->plugin, cmd, "currencyconvert",
currency_done, forward_error,
offinfo);
json_add_u32(req->js, "amount", 1);
json_add_stringn(req->js, "currency",
(const char *)offer->currency,
tal_bytelen(offer->currency));
return send_outreq(cmd->plugin, req);
}
return create_offer(cmd, offinfo);
}
struct command_result *json_offerout(struct command *cmd,
const char *buffer,
const jsmntok_t *params)
{
const char *desc, *vendor, *label;
struct tlv_offer *offer;
struct out_req *req;
offer = tlv_offer_new(cmd);
if (!param(cmd, buffer, params,
p_req("amount", param_msat_or_any, offer),
p_req("description", param_escaped_string, &desc),
p_opt("vendor", param_escaped_string, &vendor),
p_opt("label", param_escaped_string, &label),
p_opt("absolute_expiry", param_u64, &offer->absolute_expiry),
p_opt("refund_for", param_invoice_payment_hash, &offer->refund_for),
/* FIXME: hints support! */
NULL))
return command_param_failed();
offer->send_invoice = tal(offer, struct tlv_offer_send_invoice);
/* BOLT-offers #12:
*
* - if the chain for the invoice is not solely bitcoin:
* - MUST specify `chains` the offer is valid for.
* - otherwise:
* - the bitcoin chain is implied as the first and only entry.
*/
if (!streq(chainparams->network_name, "bitcoin")) {
offer->chains = tal_arr(offer, struct bitcoin_blkid, 1);
offer->chains[0] = chainparams->genesis_blockhash;
}
offer->description = tal_dup_arr(offer, char, desc, strlen(desc), 0);
if (vendor)
offer->vendor = tal_dup_arr(offer, char,
vendor, strlen(vendor), 0);
offer->node_id = tal_dup(offer, struct pubkey32, &id);
/* We simply pass this through. */
req = jsonrpc_request_start(cmd->plugin, cmd, "createoffer",
forward_result, forward_error,
offer);
json_add_string(req->js, "bolt12", offer_encode(tmpctx, offer));
if (label)
json_add_string(req->js, "label", label);
json_add_bool(req->js, "single_use", true);
return send_outreq(cmd->plugin, req);
}