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Renepay use getroutes #8049

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@Lagrang3 Lagrang3 commented Feb 4, 2025

This PR removes the MCF code from renepay. Routes are computed using getroutes instead.

Depends on #7985 (merged)
Replaces #7633 (closed)
It would be nice to have on top of #7963 "temporary layers" and #8072 "bias stacking"

@Lagrang3 Lagrang3 marked this pull request as draft February 4, 2025 08:58
@Lagrang3 Lagrang3 force-pushed the renepay-use-askrene branch 3 times, most recently from 1062510 to b2fcf5f Compare February 10, 2025 10:14
@Lagrang3 Lagrang3 force-pushed the renepay-use-askrene branch 2 times, most recently from f1b0fce to ac2e0b1 Compare February 19, 2025 12:12
Changelog-Added: renepay: use external call to [askrene-]getroutes instead of computing routes internally.

Signed-off-by: Lagrang3 <[email protected]>
Use askrene API to account for route-hints and blinded paths.

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Signed-off-by: Lagrang3 <[email protected]>
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Signed-off-by: Lagrang3 <[email protected]>
The execution of the failure notification makes calls to askrene to
disable or bias channels that have returned weird errors.

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Signed-off-by: Lagrang3 <[email protected]>
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Signed-off-by: Lagrang3 <[email protected]>
Remove unnecessary rpc call to waitblockheight at the default payment's
ending.

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Signed-off-by: Lagrang3 <[email protected]>
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Signed-off-by: Lagrang3 <[email protected]>
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Signed-off-by: Lagrang3 <[email protected]>
@Lagrang3 Lagrang3 force-pushed the renepay-use-askrene branch from ac2e0b1 to c2925cf Compare February 20, 2025 07:45
Remove the MCF solver from renepay.
Offload the route computation on askrene.

Changelog-None

Signed-off-by: Lagrang3 <[email protected]>
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Signed-off-by: Lagrang3 <[email protected]>
Use plugin_get_data API and make less use of the access to the global
plugin state when possible.

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Signed-off-by: Lagrang3 <[email protected]>
Sending requests with batches allow us to avoid race conditions
when the payment plugin goes to the next state before the sendpay RPC
have not yet completed.

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Signed-off-by: Lagrang3 <[email protected]>
Use askrene-reserve API to lock-in the liquidity of the channels in use
for pending payment route.

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Signed-off-by: Lagrang3 <[email protected]>
Use askrene-unreserve to remove reserved liquidity associated with
routes that have completed, either by success or failure.

Changelog-None

Signed-off-by: Lagrang3 <[email protected]>
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