mirror of
https://github.com/ElementsProject/lightning.git
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dualopend: if required, validate inputs rcvd from peer
Pass in the "validate inputs confirmed" flag from lightningd; use flag to determine whether or not to validate the inputs we've recieved from peer.
This commit is contained in:
niftynei
Alex Myers
parent
442b479d2c
commit
fa80f15f85
3 changed files with 98 additions and 20 deletions
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@ -3636,7 +3636,8 @@ bool peer_start_dualopend(struct peer *peer,
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min_effective_htlc_capacity,
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&channel->local_basepoints,
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&channel->local_funding_pubkey,
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channel->minimum_depth);
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channel->minimum_depth,
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peer->ld->config.require_confirmed_inputs);
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subd_send_msg(channel->owner, take(msg));
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return true;
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}
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@ -3744,7 +3745,8 @@ bool peer_restart_dualopend(struct peer *peer,
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inflight->lease_chan_max_ppt,
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amount_sat_zero(inflight->lease_amt) ?
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NULL : &inflight->lease_amt,
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channel->type);
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channel->type,
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false); /* FIXME: use persisted state? */
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subd_send_msg(channel->owner, take(msg));
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return true;
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@ -218,7 +218,7 @@ struct state {
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struct amount_sat *requested_lease;
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/* Does this negotation require confirmed inputs? */
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bool require_confirmed_inputs;
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bool require_confirmed_inputs[NUM_SIDES];
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};
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/* psbt_changeset_get_next - Get next message to send
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@ -517,6 +517,35 @@ static bool is_dust(struct tx_state *tx_state,
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|| !amount_sat_greater(amount, tx_state->remoteconf.dust_limit);
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}
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static char *validate_inputs(struct state *state,
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struct tx_state *tx_state,
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enum tx_role role_to_validate)
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{
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/* BOLT-18195c86294f503ffd2f11563250c854a50bfa51 #2:
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* Upon receipt of consecutive `tx_complete`s, the receiving node:
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* ...
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* - if it has sent `require_confirmed_inputs` in `open_channel2`
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* or `accept_channel2`:
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* - MUST fail the negotiation if:
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* - one of the inputs added by the other peer is unconfirmed
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*/
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u8 *msg;
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char *err_reason;
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msg = towire_dualopend_validate_inputs(NULL, tx_state->psbt,
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role_to_validate);
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wire_sync_write(REQ_FD, take(msg));
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msg = wire_sync_read(tmpctx, REQ_FD);
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if (!fromwire_dualopend_validate_inputs_reply(msg)) {
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if (!fromwire_dualopend_fail(tmpctx, msg, &err_reason))
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master_badmsg(fromwire_peektype(msg), msg);
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return err_reason;
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}
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return NULL;
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}
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static void set_reserve(struct tx_state *tx_state,
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struct amount_sat funding_total,
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enum tx_role our_role)
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@ -1136,7 +1165,7 @@ fetch_psbt_changes(struct state *state,
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/* Go ask lightningd what other changes we've got */
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msg = towire_dualopend_psbt_changed(NULL, &state->channel_id,
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state->require_confirmed_inputs,
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state->require_confirmed_inputs[REMOTE],
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tx_state->funding_serial,
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psbt);
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@ -2207,7 +2236,8 @@ static void accepter_start(struct state *state, const u8 *oc2_msg)
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open_err_fatal(state, "Parsing open_channel2 %s",
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tal_hex(tmpctx, oc2_msg));
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state->require_confirmed_inputs = open_tlv->require_confirmed_inputs != NULL;
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state->require_confirmed_inputs[REMOTE] =
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open_tlv->require_confirmed_inputs != NULL;
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if (open_tlv->upfront_shutdown_script)
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set_remote_upfront_shutdown(state, open_tlv->upfront_shutdown_script);
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@ -2326,7 +2356,7 @@ static void accepter_start(struct state *state, const u8 *oc2_msg)
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state->upfront_shutdown_script[REMOTE],
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state->requested_lease,
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tx_state->blockheight,
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state->require_confirmed_inputs);
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state->require_confirmed_inputs[REMOTE]);
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wire_sync_write(REQ_FD, take(msg));
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msg = wire_sync_read(tmpctx, REQ_FD);
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@ -2493,6 +2523,16 @@ static void accepter_start(struct state *state, const u8 *oc2_msg)
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state->our_funding_pubkey,
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tx_state->blockheight);
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/* BOLT-18195c86294f503ffd2f11563250c854a50bfa51 #2:
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*
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* The sending node may require the other participant to
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* only use confirmed inputs. This ensures that the sending
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* node doesn't end up paying the fees of a low feerate
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* unconfirmed ancestor of one of the other participant's inputs.
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*/
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if (state->require_confirmed_inputs[LOCAL])
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a_tlv->require_confirmed_inputs =
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tal(a_tlv, struct tlv_accept_tlvs_require_confirmed_inputs);
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msg = towire_accept_channel2(tmpctx, &state->channel_id,
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/* Our amount w/o the lease fee */
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@ -2527,6 +2567,14 @@ static void accepter_start(struct state *state, const u8 *oc2_msg)
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if (!run_tx_interactive(state, tx_state, &tx_state->psbt, TX_ACCEPTER))
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return;
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if (state->require_confirmed_inputs[LOCAL]) {
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err_reason = validate_inputs(state, tx_state, TX_INITIATOR);
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if (err_reason) {
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open_abort(state, "%s", err_reason);
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return;
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}
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}
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msg = accepter_commits(state, tx_state, total, &err_reason);
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if (!msg) {
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if (err_reason)
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@ -2927,6 +2975,17 @@ static void opener_start(struct state *state, u8 *msg)
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open_tlv->request_funds->blockheight = tx_state->blockheight;
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}
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/* BOLT-18195c86294f503ffd2f11563250c854a50bfa51 #2:
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*
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* The sending node may require the other participant to
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* only use confirmed inputs. This ensures that the sending
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* node doesn't end up paying the fees of a low feerate
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* unconfirmed ancestor of one of the other participant's inputs.
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*/
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if (state->require_confirmed_inputs[LOCAL])
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open_tlv->require_confirmed_inputs =
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tal(open_tlv, struct tlv_opening_tlvs_require_confirmed_inputs);
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msg = towire_open_channel2(NULL,
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&chainparams->genesis_blockhash,
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&state->channel_id,
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@ -2997,7 +3056,8 @@ static void opener_start(struct state *state, u8 *msg)
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}
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/* Set the require confirms from peer's TLVs */
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state->require_confirmed_inputs = a_tlv->require_confirmed_inputs != NULL;
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state->require_confirmed_inputs[REMOTE] =
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a_tlv->require_confirmed_inputs != NULL;
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if (a_tlv->upfront_shutdown_script)
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set_remote_upfront_shutdown(state, a_tlv->upfront_shutdown_script);
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@ -3015,7 +3075,7 @@ static void opener_start(struct state *state, u8 *msg)
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msg = towire_dualopend_dry_run(NULL, &state->channel_id,
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tx_state->opener_funding,
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tx_state->accepter_funding,
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state->require_confirmed_inputs,
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state->require_confirmed_inputs[REMOTE],
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a_tlv->will_fund
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? &a_tlv->will_fund->lease_rates
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: NULL);
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@ -3185,16 +3245,9 @@ static void opener_start(struct state *state, u8 *msg)
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/* We need to check that the inputs we've already provided
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* via the API are confirmed :/ */
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if (state->require_confirmed_inputs) {
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msg = towire_dualopend_validate_inputs(NULL, tx_state->psbt,
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state->our_role);
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wire_sync_write(REQ_FD, take(msg));
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msg = wire_sync_read(tmpctx, REQ_FD);
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if (!fromwire_dualopend_validate_inputs_reply(msg)) {
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if (!fromwire_dualopend_fail(msg, msg, &err_reason))
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master_badmsg(fromwire_peektype(msg), msg);
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/* We abort, because we don't have valid inputs */
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if (state->require_confirmed_inputs[REMOTE]) {
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err_reason = validate_inputs(state, tx_state, state->our_role);
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if (err_reason) {
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open_abort(state, "%s", err_reason);
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return;
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}
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@ -3239,6 +3292,15 @@ static void opener_start(struct state *state, u8 *msg)
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if (!run_tx_interactive(state, tx_state, &tx_state->psbt, TX_INITIATOR))
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return;
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if (state->require_confirmed_inputs[LOCAL]) {
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err_reason = validate_inputs(state, tx_state, TX_ACCEPTER);
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if (err_reason) {
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open_abort(state, "%s", err_reason);
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return;
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}
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}
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msg = opener_commits(state, tx_state, total, &err_reason);
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if (!msg) {
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if (err_reason)
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@ -3318,6 +3380,16 @@ static void rbf_wrap_up(struct state *state,
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return;
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}
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if (state->require_confirmed_inputs[LOCAL]) {
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err_reason = validate_inputs(state, tx_state,
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state->our_role == TX_INITIATOR ?
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TX_ACCEPTER : TX_INITIATOR);
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if (err_reason) {
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open_abort(state, "%s", err_reason);
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return;
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}
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}
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/* Is this an eligible RBF (at least one overlapping input) */
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msg = towire_dualopend_rbf_validate(NULL, tx_state->psbt);
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wire_sync_write(REQ_FD, take(msg));
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@ -4156,7 +4228,8 @@ int main(int argc, char *argv[])
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&state->min_effective_htlc_capacity,
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&state->our_points,
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&state->our_funding_pubkey,
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&state->minimum_depth)) {
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&state->minimum_depth,
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&state->require_confirmed_inputs[LOCAL])) {
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/*~ Initially we're not associated with a channel, but
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* handle_peer_gossip_or_error compares this. */
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memset(&state->channel_id, 0, sizeof(state->channel_id));
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@ -4215,7 +4288,8 @@ int main(int argc, char *argv[])
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&state->tx_state->lease_chan_max_msat,
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&state->tx_state->lease_chan_max_ppt,
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&requested_lease,
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&state->channel_type)) {
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&state->channel_type,
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&state->require_confirmed_inputs[LOCAL])) {
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bool ok;
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@ -28,6 +28,7 @@ msgdata,dualopend_init,our_basepoints,basepoints,
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msgdata,dualopend_init,our_funding_pubkey,pubkey,
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# Constraints in case the other end tries to open a channel.
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msgdata,dualopend_init,minimum_depth,u32,
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msgdata,dualopend_init,require_confirmed_inputs,bool,
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# master-dualopend: peer has reconnected
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msgtype,dualopend_reinit,7001
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@ -71,6 +72,7 @@ msgdata,dualopend_reinit,lease_chan_max_msat,u32,
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msgdata,dualopend_reinit,lease_chan_max_ppt,u16,
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msgdata,dualopend_reinit,requested_lease,?amount_sat,
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msgdata,dualopend_reinit,channel_type,channel_type,
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msgdata,dualopend_reinit,we_require_confirmed_inputs,bool,
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# dualopend->master: they offered channel, should we continue?
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msgtype,dualopend_got_offer,7005
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