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