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1fe829c546
To reduce the surface area of amount of a channel balance that can be eaten up as htlc dust, we introduce a new config '--max-dust-htlc-exposure-msat', which sets the max amount that any channel's balance can be added as dust Changelog-Added: config: new option --max-dust-htlc-exposure-msat, which limits the total amount of sats to be allowed as dust on a channel
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
#ifndef LIGHTNING_COMMON_CHANNEL_CONFIG_H
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#define LIGHTNING_COMMON_CHANNEL_CONFIG_H
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#include "config.h"
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#include <common/amount.h>
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/* BOLT #2:
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*
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* 1. type: 32 (`open_channel`)
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* 2. data:
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* * [`chain_hash`:`chain_hash`]
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* * [`32*byte`:`temporary_channel_id`]
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* * [`u64`:`funding_satoshis`]
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* * [`u64`:`push_msat`]
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* * [`u64`:`dust_limit_satoshis`]
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* * [`u64`:`max_htlc_value_in_flight_msat`]
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* * [`u64`:`channel_reserve_satoshis`]
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* * [`u64`:`htlc_minimum_msat`]
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* * [`u32`:`feerate_per_kw`]
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* * [`u16`:`to_self_delay`]
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* * [`u16`:`max_accepted_htlcs`]
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*...
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* 1. type: 33 (`accept_channel`)
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* 2. data:
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* * [`32*byte`:`temporary_channel_id`]
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* * [`u64`:`dust_limit_satoshis`]
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* * [`u64`:`max_htlc_value_in_flight_msat`]
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* * [`u64`:`channel_reserve_satoshis`]
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* * [`u64`:`htlc_minimum_msat`]
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* * [`u32`:`minimum_depth`]
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* * [`u16`:`to_self_delay`]
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* * [`u16`:`max_accepted_htlcs`]
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*/
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struct channel_config {
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/* Database ID */
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u64 id;
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/* BOLT #2:
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*
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* `dust_limit_satoshis` is the threshold below which outputs should
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* not be generated for this node's commitment or HTLC transaction */
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struct amount_sat dust_limit;
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/* BOLT #2:
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*
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* `max_htlc_value_in_flight_msat` is a cap on total value of
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* outstanding HTLCs, which allows a node to limit its exposure to
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* HTLCs */
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struct amount_msat max_htlc_value_in_flight;
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/* BOLT #2:
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*
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* `channel_reserve_satoshis` is the minimum amount that the other
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* node is to keep as a direct payment. */
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struct amount_sat channel_reserve;
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/* BOLT #2:
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*
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* `htlc_minimum_msat` indicates the smallest value HTLC this node
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* will accept.
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*/
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struct amount_msat htlc_minimum;
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/* BOLT #2:
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*
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* `to_self_delay` is the number of blocks that the other node's
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* to-self outputs must be delayed, using `OP_CHECKSEQUENCEVERIFY`
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* delays */
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u16 to_self_delay;
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/* BOLT #2:
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*
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* similarly, `max_accepted_htlcs` limits the number of outstanding
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* HTLCs the other node can offer. */
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u16 max_accepted_htlcs;
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/* BOLT-TBD #X
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*
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* maximum dust exposure allowed for this channel
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*/
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struct amount_msat max_dust_htlc_exposure_msat;
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};
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void towire_channel_config(u8 **pptr, const struct channel_config *config);
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void fromwire_channel_config(const u8 **ptr, size_t *max,
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struct channel_config *config);
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#endif /* LIGHTNING_COMMON_CHANNEL_CONFIG_H */
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