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psbt-finalized: hoist method to common

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niftynei 2020-10-08 17:01:38 -05:00 • committed by Rusty Russell
parent b6a7b52a3e
commit b4773203bb
3 changed files with 26 additions and 27 deletions
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17
common/psbt_open.c
View file

@ -567,3 +567,20 @@ psbt_to_witness_stacks(const tal_t *ctx,
tal_resize(&stacks, stack_index);
return stacks;
}
bool psbt_side_finalized(const struct wally_psbt *psbt, enum tx_role role)
{
u16 serial_id;
for (size_t i = 0; i < psbt->num_inputs; i++) {
if (!psbt_get_serial_id(&psbt->inputs[i].unknowns,
&serial_id)) {
return false;
}
if (serial_id % 2 == role) {
if (!psbt->inputs[i].final_witness ||
psbt->inputs[i].final_witness->num_items == 0)
return false;
}
}
return true;
}

4
common/psbt_open.h
View file

@ -179,4 +179,8 @@ const struct witness_stack **
psbt_to_witness_stacks(const tal_t *ctx,
const struct wally_psbt *psbt,
enum tx_role side_to_stack);
/* psbt_side_finalized - True if designated role has all signature data */
bool psbt_side_finalized(const struct wally_psbt *psbt,
enum tx_role role);
#endif /* LIGHTNING_COMMON_PSBT_OPEN_H */

32
lightningd/dual_open_control.c
View file

@ -38,29 +38,6 @@ struct commit_rcvd {
struct uncommitted_channel *uc;
};
static bool psbt_side_finalized(struct log *log, struct wally_psbt *psbt, enum side opener)
{
u16 serial_id;
for (size_t i = 0; i < psbt->num_inputs; i++) {
if (!psbt_get_serial_id(&psbt->inputs[i].unknowns, &serial_id)) {
log_broken(log, "dual funding PSBT must have serial_id for each "
"input, none found for input %zu", i);
return false;
}
/* It's our input if parity matches -- this shorthand
* works because LOCAL == 0. If the parity is even and
* we're the opener then it's ours; if the parity is odd
* and the REMOTE's the opener (opener == 1), then it's also
* ours. */
if (serial_id % 2 == opener) {
if (!psbt->inputs[i].final_witness ||
psbt->inputs[i].final_witness->num_items == 0)
return false;
}
}
return true;
}
static void handle_signed_psbt(struct lightningd *ld,
const struct wally_psbt *psbt,
struct commit_rcvd *rcvd)
@ -548,9 +525,10 @@ openchannel2_sign_hook_cb(struct openchannel2_psbt_payload *payload STEALS)
/* Finalize it, if not already. It shouldn't work entirely */
psbt_finalize(payload->psbt);
if (!psbt_side_finalized(payload->ld->log, payload->psbt, REMOTE))
fatal("Plugin must return a 'psbt' with signatures for their inputs"
" %s", type_to_string(tmpctx, struct wally_psbt, payload->psbt));
if (!psbt_side_finalized(payload->psbt, TX_ACCEPTER))
fatal("Plugin must return a 'psbt' with signatures "
"for their inputs %s",
type_to_string(tmpctx, struct wally_psbt, payload->psbt));
handle_signed_psbt(payload->ld, payload->psbt, payload->rcvd);
}
@ -1051,7 +1029,7 @@ static struct command_result *json_open_channel_signed(struct command *cmd,
psbt_finalize(psbt);
/* Check that all of *our* outputs are finalized */
if (!psbt_side_finalized(cmd->ld->log, psbt, LOCAL))
if (!psbt_side_finalized(psbt, TX_INITIATOR))
return command_fail(cmd, FUNDING_PSBT_INVALID,
"Local PSBT input(s) not finalized");