[TASK] Process DKG/Substrate extrinsic calls through Tx queue

[shekohex]

Overview

DKG should make use of the Substrate Transaction Queue instead of in-place sending transactions.

Task Checklist

• [x] Create transactions in-place and encode them.
• [x] Make use of the Substrate tx queue.
• [x] Process all extrinsic calls made to DKG and substrate through the tx queue like from here

[Nutomic]

Is there an example somewhere how this tx queue should be used?

[shekohex]

Is there an example somewhere how this tx queue should be used?

Here is an example of using the transaction queue: https://github.com/webb-tools/relayer/blob/2b1370e592523931d7f995aa03c8bb4f29eb2547/event-watchers/substrate/src/signature_bridge_watcher.rs#L213-L240