Handle delegation withdrawn

[jrwbabylonlab]

• Sync with BTC node
• For each tx, check if matches staking/unbonding tx
• Mark delegation as withdrawn and emit msg into rabbitmq

One thing to note is that there might be a race condition when bootstrapping BBN & BTC at the same time. You may consider only to bootstrap BTC txs a bit later. Worth investigate if BBN emit its stored BTC head number as an event, and sync until this height.

Update: We simply just need to register spend notification on staking and unbonding tx and then identify the spent path is withdrawal and mark status as "Withdrawn"

[jrwbabylonlab]

@gusin13 how about this one? is this done?

[gusin13]

not yet, still WIP.