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protocol: increase HTLC precision to 1/1000 satoshi.

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This gets truncated for on-chain transactions (thus, rounding may
contribute to fees).

This also means we currently have an upper bound of 0.04 BTC per HTLC;
this can be increased later if required.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2015-09-24 15:00:47 +09:30
parent 58a62e782d
commit 5bc22f0368
13 changed files with 75 additions and 62 deletions
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6
commit_tx.c
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@@ -38,7 +38,7 @@ static bool add_htlc(struct bitcoin_tx *tx, size_t n,
htlc_abstime, locktime, rhash,
&htlc_rhash));
tx->output[n].script_length = tal_count(tx->output[n].script);
tx->output[n].amount = h->amount;
tx->output[n].amount = h->amount_msat / 1000;
return true;
}
@@ -81,14 +81,14 @@ struct bitcoin_tx *create_commit_tx(const tal_t *ctx,
rhash);
tx->output[0].script = scriptpubkey_p2sh(tx, redeemscript);
tx->output[0].script_length = tal_count(tx->output[0].script);
tx->output[0].amount = cstate->a.pay;
tx->output[0].amount = cstate->a.pay_msat / 1000;
/* Second output is a P2SH payment to them. */
tx->output[1].script = scriptpubkey_p2sh(ctx,
bitcoin_redeem_single(ctx,
&theirkey));
tx->output[1].script_length = tal_count(tx->output[1].script);
tx->output[1].amount = cstate->b.pay;
tx->output[1].amount = cstate->b.pay_msat / 1000;
/* First two outputs done, now for the HTLCs. */
total = tx->output[0].amount + tx->output[1].amount;