fix: cancel tx if missing from blockchain after some timeout

[acha-bill]

Checklist

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Description

Cancel a tx if it's missing from the blockchain after a certain timeout—currently, 5 block times.

closes #5133

[martinconic]

Is there a way we can test this?

[gacevicljubisa]

Is there a way we can test this?

Maybe we can test it mannualy with insufficient gas, invalid signature, low nonce, or insufficient funds.

[mfw78]

In general, I'm not sure about this mechanism. If there has been a transaction that has been signed, and broadcast to some RPC, while that RPC may have some failures of some sort, the bee node has no way to intrinsically verify this.

As such, transactions should never be deemed "cancelled" unless in the circumstance that another transaction has been verified on chain that corresponds to the cancelled transaction's nonce.

For example, if the transaction monitor sent to the RPC a transaction, and after some time, when checking the account's nonce from the RPC it hadn't incremented (ie. the transaction hadn't been confirmed), then it seems that the "failed transaction" could instead be determined to be "stale" and the transaction monitor could simply broadcast another transaction using the same nonce (and if this subsequent transaction is verified, then the stale transaction would change state to 'dropped' / 'cancelled').