Rosetta - return generic UNKNOWN operation type for future HAPI transaction types

[xin-hedera]

Problem

It's a maintenance burden to add support of resolving a new transaction type (an integer) to its transaction name (in text, and in rosetta world, it's used as operation type). In the mean time, if the customer needs support of a specific transaction for both rosetta data API and construction API, a request shall be made and worked ahead of going to production.

Thus, in mirrornode rosetta module, for any transaction type out of the already supported ones, UNKNOWN should be provided as the operation type.

Solution

• make types.TransactionTypes private, i.e., change it to types.transactionTypes
• add a public function func GetTransactionType(type int32) string
• replace references of types.TransactionTypes to types.GetTransactionType
• Check if we can enumerate transaction results or types from the sdk instead of explicitly defining them

Alternatives

No response