dual funding needs the max-witness-len and utxo fields set for every
input. we should add them when we create a 'fundpsbt', so that every
psbt that c-lightning generates is dual-funding ready
fundpsbt / utxopsbt create a (typically) output-less PSBT,
however for elements we require the fees to be encapsulated in an
output.
this patch updates fundpsbt / utxopsbt to add a fee output for elements
transactions. includes test updates.
Fixes#3998
This removes the reservation cleanup at startup, too, now they're all
using 'reserved_til'.
This changes test_withdraw, since it asserted that outputs were marked
spent as soon as we broadcast a transaction: now they're reserved until
it's mined. Similarly, test_addfunds_from_block assumed we'd see funds
as soon as we broadcast the tx.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Changed: JSON-RPC: `withdraw` now randomizes input and output order, not BIP69.
If all is set, diff may not be:
==1230518== Use of uninitialised value of size 8
==1230518== at 0x4C5781B: _itoa_word (_itoa.c:179)
==1230518== by 0x4C736F4: __vfprintf_internal (vfprintf-internal.c:1687)
==1230518== by 0x4C88119: __vsnprintf_internal (vsnprintf.c:114)
==1230518== by 0x1D44B6: do_vfmt (str.c:66)
==1230518== by 0x1D45A0: tal_vfmt_ (str.c:92)
==1230518== by 0x1D4401: tal_fmt_ (str.c:44)
==1230518== by 0x15D30F: fmt_amount_sat (amount.c:60)
==1230518== by 0x15D338: fmt_amount_sat_ (amount.c:62)
==1230518== by 0x178C45: type_to_string_ (type_to_string.c:35)
==1230518== by 0x1B8F75: json_fundpsbt (reservation.c:394)
==1230518== by 0x12D0EC: command_exec (jsonrpc.c:602)
==1230518== by 0x12D598: rpc_command_hook_callback (jsonrpc.c:712)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Required for dual funding where the opener sets it.
Changelog-Added: JSON-RPC: `fundpsbt` takes a new `locktime` parameter
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This more closely mirrors fundpsbt (which will only select unreserved ones)
but you can turn it off if you want to e.g. rbf in future.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Added: JSON-RPC: New low-level command `utxopsbt` to create PSBT from existing utxos.
It's *possible* to do this using various RPC calls, but it's
unfriendly:
1. Call getinfo to get the current block height.
2. Call listfunds to map the UTXOs.
3. Create the PSBT and hope you get all the fields correct.
Instead, this presents an interface just like `fundpsbt`, with identical
returns.
I think it's different enough to justify a new command (though it
shares much internally, of course).
In particular, it's now quite simple to create a command which uses
specified utxos, and then adds more to meet any shortfall.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It keeps multiple different variables around the loop, but a simple
"are we done yet?" helper makes this clearer and reduces special
cases or all-vs-target.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
fundpsbt forces the caller to manually add their weight * feerate
to the satoshis they ask for. That means no named feerates.
Instead, create a startweight parameter and do the calc for them
internally, and return the feerate we used (and, while we're at it,
the estimated final weight).
This API change is best done now, as it would otherwise have to
be appended as a parameter.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Technically, they could do this themselves, but it's much nicer to have one
place to do it (and it makes sure we get the required information into the
PSBT, which is actually not entirely accessible through listfunds, as that
doesn't want to consult with the HSM for close outputs).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Added: JSON RPC: new low-level coin selection `fundpsbt` routine.
This is the normal case: you only want to reserve inputs which
are not already reserved. This saves you iterating through the
results and unreserving some if you weren't exclusive.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
reserveinputs marks UTXOs reserved for 12 hours, so we won't select them
for spending: unreserveinputs marks them available again.
Exposes param_psbt() for wider use.
Disabled the test_sign_and_send_psbt since we're altering the API;
the final patch restores it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
