Streamline Messages from BlockchainBridge to the Accountant

[utkarshg6]

The objective is to decrease the total number of messages sent from BlockchainBridge to the Accountant.

Eliminate ScanError messages and integrate their information into existing messages (consider OutboundPaymentsInstructions & QualifiedPayablesMessage). This will streamline communication and reduce message volume.

In certain scenarios, we encounter partial errors that currently trigger ScanError messages. Instead of sending these messages, we propose utilizing the two previously mentioned messages to convey both total and partial failures. By doing this, BlockchainBridge will not segregate the messages, allowing the Accountant to manage success, partial failures, and total failures more effectively.

[kauri-hero]

Blocked by #456