fix: translate OnChainTxns retrieved from cache

[vindard]

Description

This is a first draft for the fix for issues: #1399, #1528, https://github.com/GaloyMoney/galoy-mobile/issues/548

The issue is that the full IncomingOnChainTransaction type isn't persisted in redis, but our code assumes this full type comes back via get. There needs to be a translation method somewhere to convert from redis persistence back to our domain type.

This is a first draft demonstrating the fix, but this fix may also be executed via a new repository that is specifically an IncomingOnChainTransactionsRepository function.

TODO

• [ ] Add tests to capture issue and fix
• [ ] Potentially refactor to repository pattern

Details

Original object:

{
  confirmations: 0,
  rawTx: {
    txHash: '688b2092df3c9f451b65d9b0b55515d8c8311559052542b50b4b953755539354',
    outs: [Array]
  },
  fee: 0,
  createdAt: 2022-08-12T05:11:59.000Z,
  uniqueAddresses: [Function: uniqueAddresses]
}

Object from redis:

{
  confirmations: 0,
  rawTx: {
    txHash: '688b2092df3c9f451b65d9b0b55515d8c8311559052542b50b4b953755539354',
    outs: [Array]
  },
  fee: 0,
  createdAt: '2022-08-12T05:11:59.000Z',
}