When merging transactions for DeFi protocols with delayed unstaking (like sUSDe with 7-day cooldown periods), Koinly currently uses the date of the first transaction instead of when tokens are actually received.

The Problem:

I merged a sUSDe unstaking transaction (sent to contract) with the finalization transaction (received USDE tokens 7+ days later)

Koinly used the initial send date, not the receive date

This messes up cost basis calculations since the tokens weren't actually received until the second date

Proposed Solution:

Allow users to choose which date to use when merging transactions, especially for:

Unstaking with cooldown periods

Multi-step DeFi operations

Any scenario where the economically meaningful date differs from the chronologically first transaction

This would fix cost basis timing issues and better reflect the actual economic reality of when assets are received.