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[pallet_broker] Fix adapt_price behaviour at zero #3636

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Mar 11, 2024
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This fixes the behaviour of Linear which is the default implementation of the AdaptPrice trait in the broker pallet. Previously if cores were offered but not sold in only one sale, the price would be set to zero and due to the logic being purely multiplicative, the price would stay at 0 indefinitely.

This could be further paired with a configurable minimum in the broker pallet itself, which will be a future PR.

This affects the Rococo and Westend Coretime chains, but Kusama has a different implementation so this isn't required for the Kusama launch. I actually thought I opened this a while ago.

@seadanda seadanda added the T2-pallets This PR/Issue is related to a particular pallet. label Mar 10, 2024
@seadanda seadanda self-assigned this Mar 10, 2024
@seadanda seadanda requested a review from a team as a code owner March 10, 2024 05:51
@seadanda seadanda requested a review from eskimor March 10, 2024 05:55
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Maybe some tests would be nice to cover some edge cases.

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substrate/frame/broker/src/adapt_price.rs Outdated Show resolved Hide resolved
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@bkchr bkchr added this pull request to the merge queue Mar 11, 2024
Merged via the queue into master with commit aa35328 Mar 11, 2024
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@bkchr bkchr deleted the donal-adapt-price branch March 11, 2024 14:51
dharjeezy pushed a commit to dharjeezy/polkadot-sdk that referenced this pull request Mar 24, 2024
This fixes the behaviour of `Linear` which is the default implementation
of the `AdaptPrice` trait in the broker pallet. Previously if cores were
offered but not sold in only one sale, the price would be set to zero
and due to the logic being purely multiplicative, the price would stay
at 0 indefinitely.

This could be further paired with a configurable minimum in the broker
pallet itself, which will be a future PR.

This affects the Rococo and Westend Coretime chains, but Kusama has a
different implementation so this isn't required for the Kusama launch. I
actually thought I opened this a while ago.

---------

Co-authored-by: Bastian Köcher <[email protected]>
bgallois pushed a commit to duniter/duniter-polkadot-sdk that referenced this pull request Mar 25, 2024
This fixes the behaviour of `Linear` which is the default implementation
of the `AdaptPrice` trait in the broker pallet. Previously if cores were
offered but not sold in only one sale, the price would be set to zero
and due to the logic being purely multiplicative, the price would stay
at 0 indefinitely.

This could be further paired with a configurable minimum in the broker
pallet itself, which will be a future PR.

This affects the Rococo and Westend Coretime chains, but Kusama has a
different implementation so this isn't required for the Kusama launch. I
actually thought I opened this a while ago.

---------

Co-authored-by: Bastian Köcher <[email protected]>
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