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hsmd: add hsmd_preapprove_invoice and check_preapproveinvoice pay modifier

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Changelog-added: hsmd: A new message `hsmd_preapprove_invoice` is added.
Changelog-added: JSON-RPC: A new command `preapproveinvoice` is added.
This commit is contained in:
Ken Sedgwick
2022-09-13 09:37:05 -07:00
committed by Alex Myers
parent 9482e0619c
commit f29343d740
14 changed files with 205 additions and 0 deletions
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48
plugins/libplugin-pay.c
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@@ -3905,6 +3905,54 @@ static void payee_incoming_limit_step_cb(void *d UNUSED, struct payment *p)
REGISTER_PAYMENT_MODIFIER(payee_incoming_limit, void *, NULL,
payee_incoming_limit_step_cb);
/*****************************************************************************
* check_preapproveinvoice
*
* @desc submit the invoice to the HSM for approval, fail the payment if not approved.
*
* This paymod checks the invoice for approval with the HSM, which might:
* - check with the user for specific approval
* - enforce velocity controls
* - automatically approve the invoice (default)
*/
static struct command_result *
check_preapproveinvoice_allow(struct command *cmd,
const char *buf,
const jsmntok_t *result,
struct payment *p)
{
/* On success, an empty object is returned. */
payment_continue(p);
return command_still_pending(cmd);
}
static struct command_result *preapproveinvoice_rpc_failure(struct command *cmd,
const char *buffer,
const jsmntok_t *toks,
struct payment *p)
{
payment_abort(p,
"Failing payment due to a failed RPC call: %.*s",
toks->end - toks->start, buffer + toks->start);
return command_still_pending(cmd);
}
static void check_preapproveinvoice_start(void *d UNUSED, struct payment *p)
{
/* Ask the HSM if the invoice is OK to pay */
struct out_req *req;
req = jsonrpc_request_start(p->plugin, NULL, "preapproveinvoice",
&check_preapproveinvoice_allow,
&preapproveinvoice_rpc_failure, p);
/* FIXME: rename parameter to invstring */
json_add_string(req->js, "bolt11", p->invstring);
(void) send_outreq(p->plugin, req);
}
REGISTER_PAYMENT_MODIFIER(check_preapproveinvoice, void *, NULL,
check_preapproveinvoice_start);
static struct route_exclusions_data *
route_exclusions_data_init(struct payment *p)
{