[babylon] Handle the early unbonding transaction

[jolestar]

Proposal Details

The staking UTXO can be spent before the time lock via early unbonding, we need to handle it.
When the UTXO is spent, we should remove the BBNStakeSeal object.

babylonlabs-io/staking-indexer#27

[mx819812523]

can we temporarily useBBNStakeSeal.txid and BBNStakeSeal.staking_output_index call object::exists_object_with_type<UTXO> to check BBNStakeSeal is effective?

[jolestar]

Yes, we can provide a function to check UTXO and remove the BBNStakeSeal. After the Babylon mainnet is ready, we design an automated processing mechanism to clear the expired BBNStakeSeal.