Migrate from /transaction-confirmation to /preview endpoint

[iamacook]

What is the feature about

The /transaction-confirmation endpoint only returns swap and staking-related data. However, the /preview endpoint returns this and the TransactionInfo of all other types. By migrating, we can provide a more details transaction confirmation overview.

Note: the /transaction-confirmation endpoint has been marked as deprecated and, after this, will be removed.

The list of requirements

• Migrate from /transaction-confirmation to /preview endpoint
• Add transaction confirmation mapping for non-swap/staking TransactionInfo

Links

• Dreprecation PR that adds swaps/staking to /preview endpoint