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paymod: Parse createonion result and call sendonion

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This commit is contained in:
Christian Decker 2020-05-14 15:37:48 +02:00
parent d37b8548fb
commit d8ebe6fbcd
2 changed files with 76 additions and 1 deletions
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70
plugins/libplugin-pay.c
View file

@ -178,7 +178,38 @@ static u8 *tal_towire_legacy_payload(const tal_t *ctx, const struct legacy_paylo
return buf;
}
static struct command_result *payment_createonion_success(struct command *cmd,
static struct createonion_response *
tal_createonion_response_from_json(const tal_t *ctx, const char *buffer,
const jsmntok_t *toks)
{
size_t i;
struct createonion_response *resp;
const jsmntok_t *oniontok = json_get_member(buffer, toks, "onion");
const jsmntok_t *secretstok = json_get_member(buffer, toks, "shared_secrets");
const jsmntok_t *cursectok;
if (oniontok == NULL || secretstok == NULL)
return NULL;
resp = tal(ctx, struct createonion_response);
if (oniontok->type != JSMN_STRING)
goto fail;
resp->onion = json_tok_bin_from_hex(resp, buffer, oniontok);
resp->shared_secrets = tal_arr(resp, struct secret, secretstok->size);
json_for_each_arr(i, cursectok, secretstok) {
if (cursectok->type != JSMN_STRING)
goto fail;
json_to_secret(buffer, cursectok, &resp->shared_secrets[i]);
}
return resp;
fail:
return tal_free(resp);
}
static struct command_result *payment_sendonion_success(struct command *cmd,
const char *buffer,
const jsmntok_t *toks,
struct payment *p)
@ -188,6 +219,43 @@ static struct command_result *payment_createonion_success(struct command *cmd,
return command_still_pending(cmd);
}
static struct command_result *payment_createonion_success(struct command *cmd,
const char *buffer,
const jsmntok_t *toks,
struct payment *p)
{
struct out_req *req;
struct route_hop *first = &p->route[0];
struct secret *secrets;
p->createonion_response = tal_createonion_response_from_json(p, buffer, toks);
req = jsonrpc_request_start(p->cmd->plugin, NULL, "sendonion",
payment_sendonion_success,
payment_rpc_failure, p);
json_add_hex_talarr(req->js, "onion", p->createonion_response->onion);
json_object_start(req->js, "first_hop");
json_add_short_channel_id(req->js, "channel", &first->channel_id);
json_add_num(req->js, "direction", first->direction);
json_add_amount_msat_only(req->js, "amount_msat", first->amount);
json_add_num(req->js, "delay", first->delay);
json_add_node_id(req->js, "id", &first->nodeid);
json_object_end(req->js);
json_add_sha256(req->js, "payment_hash", p->payment_hash);
json_array_start(req->js, "shared_secrets");
secrets = p->createonion_response->shared_secrets;
for(size_t i=0; i<tal_count(secrets); i++)
json_add_secret(req->js, NULL, &secrets[i]);
json_array_end(req->js);
json_add_num(req->js, "partid", p->partid);
send_outreq(p->cmd->plugin, req);
return command_still_pending(cmd);
}
static void payment_compute_onion_payloads(struct payment *p)
{
struct createonion_request *cr;

7
plugins/libplugin-pay.h
View file

@ -3,6 +3,7 @@
#include "config.h"
#include <plugins/libplugin.h>
#include <wire/gen_onion_wire.h>
enum route_hop_style {
ROUTE_HOP_LEGACY = 1,
@ -40,6 +41,11 @@ struct createonion_request {
struct secret *session_key;
};
struct createonion_response {
u8 *onion;
struct secret *shared_secrets;
};
/* A parsed version of the possible outcomes that a sendpay / payment may
* result in. */
struct payment_result {
@ -104,6 +110,7 @@ struct payment {
struct node_id *getroute_destination;
struct createonion_request *createonion_request;
struct createonion_response *createonion_response;
/* Target amount to be delivered at the destination */
struct amount_msat amount;