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commit_tx: expose more internal functions.

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without having to build it, which is needed for limit enforcement.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2017-02-21 15:15:28 +10:30
parent e8e96e67d0
commit 9284819f68
3 changed files with 102 additions and 59 deletions
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17
lightningd/commit_tx.h
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@@ -20,6 +20,23 @@ u64 commit_number_obscurer(const struct pubkey *opener_payment_basepoint,
u64 htlc_success_fee(u64 feerate_per_kw);
u64 htlc_timeout_fee(u64 feerate_per_kw);
/**
* commit_tx_num_untrimmed: how many of these htlc outputs will commit tx have?
* @htlcs: tal_arr of HTLCs
* @feerate_per_kw: feerate to use
* @dust_limit_satoshis: dust limit below which to trim outputs.
* @side: from which side's point of view
*
* We need @side because HTLC fees are different for offered and
* received HTLCs.
*/
size_t commit_tx_num_untrimmed(const struct htlc **htlcs,
u64 feerate_per_kw, u64 dust_limit_satoshis,
enum side side);
/* Helper to calculate the base fee if we add this extra htlc */
u64 commit_tx_base_fee(u64 feerate_per_kw, size_t num_untrimmed_htlcs);
/**
* commit_tx: create (unsigned) commitment tx to spend the funding tx output
* @ctx: context to allocate transaction and @htlc_map from.