jellyfish-wallet: Transaction Builder Improvement

[fuxingloh]

What would you like to be added:

Currently, in @defichain/jellyfish-transaction-builder it creates a transaction and signs the transaction with the provided elliptic pair interface. The idea, novel at the time being an all-inclusive DfTx builder and signer. This proves difficult when implementing upstream on DeFiCh/wallet.

DeFiCh/wallet has a transaction narrative that flows as such:

BirthdayResearch/defichain-wallet#730

1. Gathering Prevout
2. Preparing Transaction
3. Confirming Prepared Transaction
4. Sign Prepared Transaction
5. Confirmed Signed Transaction
6. Broadcast Signed Transaction

These 6 steps belong to a methodical process that requires a few UI to implement. The current implementation, automate 1-4 into a swift action making it hard to follow/engineer a flow in UI.

This issue calls for a redesign/refactors of builder implementation to follow those 6 steps. Each action will have its own function to call upon. Beest implemented on @defichain/jellyfish-wallet on a extension of -*.

[defichain-bot]

@fuxingloh: Thanks for opening an issue, it is currently awaiting triage.

The triage/accepted label can be added by foundation members by writing /triage accepted in a comment.

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[fuxingloh]

Other wallet improvement suggestions:

• Deterministic Fee Estimation
• Transaction Queueing
• Transaction Creation to be written into a modular pattern where it can be tree shaken