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lease-rates: add to accepter's side on accepter pathway

This commit is contained in:
niftynei 2021-06-14 17:56:50 -05:00 committed by neil saitug
parent 63e2ce01e7
commit 7a6f84ae63
1 changed files with 47 additions and 6 deletions
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53
openingd/dualopend.c
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@ -123,6 +123,9 @@ struct tx_state {
/* Rates that we're using for this open... */
struct lease_rates *rates;
/* If delay til the channel funds lease expires */
u32 lease_expiry;
};
static struct tx_state *new_tx_state(const tal_t *ctx)
@ -192,9 +195,6 @@ struct state {
/* State of inflight funding transaction attempt */
struct tx_state *tx_state;
/* If delay til the channel funds lease expires */
u32 lease_expiry;
};
/* psbt_changeset_get_next - Get next message to send
@ -2212,6 +2212,47 @@ static void accepter_start(struct state *state, const u8 *oc2_msg)
sync_crypto_write(state->pps, msg);
peer_billboard(false, "channel open: accept sent, waiting for reply");
/* Add our fee to our amount now */
if (tx_state->rates) {
struct amount_sat lease_fee;
tx_state->lease_expiry
= lease_blockheight_start + LEASE_RATE_DURATION;
/* BOLT- #2:
* The lease fee is added to the accepter's balance
* in a channel, in addition to the `funding_satoshi`
* that they are contributing. The channel initiator
* must contribute enough funds to cover
* `open_channel2`.`funding_satoshis`, the lease fee,
* and their tx weight * `funding_feerate_perkw` / 1000.
*/
if (!lease_rates_calc_fee(tx_state->rates,
tx_state->accepter_funding,
requested_amt,
tx_state->feerate_per_kw_funding,
&lease_fee))
negotiation_failed(state,
"Unable to calculate lease fee");
/* Add it to the accepter's total */
if (!amount_sat_add(&tx_state->accepter_funding,
tx_state->accepter_funding, lease_fee)) {
negotiation_failed(state,
"Unable to add accepter's funding"
" and channel lease fee (%s + %s)",
type_to_string(tmpctx,
struct amount_sat,
&tx_state->accepter_funding),
type_to_string(tmpctx,
struct amount_sat,
&lease_fee));
return;
}
} else
tx_state->lease_expiry = 0;
/* This is unused in this flow. We re-use
* the wire method between accepter + opener, so we set it
* to an invalid number, 1 (initiator sets; valid is even) */
@ -2655,11 +2696,11 @@ static void opener_start(struct state *state, u8 *msg)
struct lease_rates *rates = &a_tlv->will_fund->lease_rates;
struct amount_sat lease_fee;
state->lease_expiry = current_blockheight + LEASE_RATE_DURATION;
tx_state->lease_expiry = current_blockheight + LEASE_RATE_DURATION;
msg = towire_dualopend_validate_lease(NULL,
&a_tlv->will_fund->signature,
state->lease_expiry,
tx_state->lease_expiry,
rates->channel_fee_max_base_msat,
rates->channel_fee_max_proportional_thousandths,
&state->their_funding_pubkey);
@ -2706,7 +2747,7 @@ static void opener_start(struct state *state, u8 *msg)
return;
}
} else
state->lease_expiry = 0;
tx_state->lease_expiry = 0;
/* Check that total funding doesn't overflow */
if (!amount_sat_add(&total, tx_state->opener_funding,