mirrors/core-lightning
1
0
Fork 0
mirror of https://github.com/ElementsProject/lightning.git synced 2025-01-17 19:03:42 +01:00
Code Issues Projects Releases Wiki Activity

lightningd: add secrets (and associated feature) to invoices.

Browse Source 
We don't need a new db column, since we can just derive the secret from
the preimage as required.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2019-11-23 10:49:23 +10:30
parent 18e9144675
commit c2e8531e8e
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
lightningd/invoice.c
View File

@ -101,6 +101,23 @@ static void wait_on_invoice(const struct invoice *invoice, void *cmd)
tell_waiter_deleted((struct command *) cmd);
}
/* We derive invoice secret using 1-way function from payment_preimage
* (just a different one from the payment_hash!) */
static void invoice_secret(const struct preimage *payment_preimage,
struct secret *payment_secret)
{
struct preimage modified;
struct sha256 secret;
modified = *payment_preimage;
modified.r[0] ^= 1;
sha256(&secret, modified.r,
ARRAY_SIZE(modified.r) * sizeof(*modified.r));
BUILD_ASSERT(sizeof(secret.u.u8) == sizeof(payment_secret->data));
memcpy(payment_secret->data, secret.u.u8, sizeof(secret.u.u8));
}
struct invoice_payment_hook_payload {
struct lightningd *ld;
/* Set to NULL if it is deleted while waiting for plugin */
@ -684,6 +701,7 @@ static struct command_result *json_invoice(struct command *cmd,
u64 *expiry;
struct sha256 rhash;
bool *exposeprivate;
struct secret payment_secret;
#if DEVELOPER
const jsmntok_t *routes;
#endif
@ -757,6 +775,8 @@ static struct command_result *json_invoice(struct command *cmd,
sizeof(info->payment_preimage));
/* Generate preimage hash. */
sha256(&rhash, &info->payment_preimage, sizeof(info->payment_preimage));
/* Generate payment secret. */
invoice_secret(&info->payment_preimage, &payment_secret);
info->b11 = new_bolt11(info, msatoshi_val);
info->b11->chain = chainparams;
@ -767,6 +787,9 @@ static struct command_result *json_invoice(struct command *cmd,
info->b11->expiry = *expiry;
info->b11->description = tal_steal(info->b11, desc_val);
info->b11->description_hash = NULL;
info->b11->payment_secret = tal_dup(info->b11, struct secret,
&payment_secret);
#if DEVELOPER
info->b11->routes = unpack_routes(info->b11, buffer, routes);