Add optional attributes to PolkadotTransaction

[jdomingos]

📝 Description
Adds optional attributes:

• validators
• numOfSlashingSpans
• rewardDestination

to the PolkadotTransaction interface and changes to the validation and serialization, based on a Ledger Live type found in the Ledger Live monorepo here.

❓ Context
We are currently building a ledger live app for StakeKit that offers users a unified non-custodial staking experience across a wide range of networks and protocols.
Like we did for Cosmos here a while back, we are now adding support to Polkadot validator staking and need this type to support and serialize all the fields needed for the different sets of calls.

✅ Checklist

• Test coverage
• Atomic delivery
• No breaking changes

[changeset-bot]

🦋 Changeset detected

Latest commit: 08ff21d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 9 packages

Name	Type
@ledgerhq/wallet-api-core	Minor
@ledgerhq/wallet-api-client	Patch
@ledgerhq/wallet-api-manifest-validator-cli	Patch
@ledgerhq/wallet-api-manifest-validator	Patch
@ledgerhq/wallet-api-server	Patch
@ledgerhq/wallet-api-simulator	Patch
wallet-api-tools	Patch
@ledgerhq/wallet-api-client-react	Patch
client-nextjs	Patch

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Name	Status	Preview	Comments	Updated (UTC)
wallet-api	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 4, 2023 0:29am
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[Justkant]

LGTM
In order to support this in LL we'll need to update the lib when we release it here and also the code here: https://github.com/LedgerHQ/ledger-live/blob/develop/libs/ledger-live-common/src/families/polkadot/walletApiAdapter.ts#L14-L47
I'll add a task to do it ASAP

[jdomingos]

LGTM In order to support this in LL we'll need to update the lib when we release it here and also the code here: https://github.com/LedgerHQ/ledger-live/blob/develop/libs/ledger-live-common/src/families/polkadot/walletApiAdapter.ts#L14-L47 I'll add a task to do it ASAP

Thanks @Justkant!

I don't mind doing a PR there as well.

[Justkant]

@jdomingos No worries, we already have a task for it and you should be able to test everything with the next nightlies of LL

You should be able to download nightlies using this link for LLD and changing the {os} part with your os (e.g. for mac
https://download.live.ledger.com/latest/mac)

Also I just saw that currently our CI for LLD nightlies is broken and we are looking into fixing this, so you might need to wait a bit more before being able to test this.

You can also build LLD locally when we are done with the PR on LL repo.

I'll also ping here when everything is done on LL side