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channeld: Code to implement splicing

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Update the lightningd <-> channeld interface with lots of new commands to needed to facilitate spicing.

Implement the channeld splicing protocol leveraging the interactivetx protocol.

Implement lightningd’s channel_control to support channeld in its splicing efforts.

Changelog-Added: Added the features to enable splicing & resizing of active channels.
This commit is contained in:
Dusty Daemon
2023-07-27 14:37:52 -07:00
committed by Rusty Russell
parent ebd0a3fd69
commit 4628e3ace8
88 changed files with 4560 additions and 644 deletions
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29
common/psbt_internal.c
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@@ -165,32 +165,3 @@ psbt_to_witnesses(const tal_t *ctx,
return witnesses;
}
size_t psbt_input_weight(struct wally_psbt *psbt,
size_t in)
{
size_t weight;
const struct wally_map_item *redeem_script;
redeem_script = wally_map_get_integer(&psbt->inputs[in].psbt_fields, /* PSBT_IN_REDEEM_SCRIPT */ 0x04);
/* txid + txout + sequence */
weight = (32 + 4 + 4) * 4;
if (redeem_script) {
weight +=
(redeem_script->value_len +
(varint_t) varint_size(redeem_script->value_len)) * 4;
} else {
/* zero scriptSig length */
weight += (varint_t) varint_size(0) * 4;
}
return weight;
}
size_t psbt_output_weight(struct wally_psbt *psbt,
size_t outnum)
{
return (8 + psbt->outputs[outnum].script_len +
varint_size(psbt->outputs[outnum].script_len)) * 4;
}