[api] Get broadcast many-inputs

[cbermudez97]

Original Issue: fibercrypto/skyxcommons#20
[GET] /api/transactions/broadcast/many-inputs/{operationId}

Should return broadcasted transaction by the opreationId. All transactions with many inputs, that were broadcasted by the should be available here.

Response:

{
// Operation ID.
“operationId”: “guid”,
// State of the transaction
// enum values:
//
// -  inProgress : transaction is being in-progress
// -  completed : transaction is completed for sure. When
// transaction is switched to the completed state,
// amount of this transaction should be already subtracted
// from the balance returned by the  [GET] /api/balances ,
// for outgoing transactions
// -  failed : transaction is failed, if applicable for the particular blockchain
//
“state”: “enum”,

 // Transaction moment as ISO 8601 in UTC
“timestamp”: “datetime”,
 // Sources.
// Should be non null if the  state is  Completed.
“inputs”: [
{
        “amount”: “string”
    }
// From address
“fromAddress”: “string”,
// Actual amount, that is transferred from the
//  fromAddress . Integer as string, aligned
// to the asset accuracy. Actual value can be
// calculated as
// x = amount / (10 ^ asset.Accuracy)
],
// Destination address
    “toAddress”: “string”,
//  Fee should always be zero if the  state is  Completed
“fee”: “string”,
   // Transaction hash as base64 string.
   // Can be empty
// Should be non empty if the  state is  Completed
    “hash”: “string”,
// Error description
// Can be empty
// Should be non empty if the  state is  Error
“error”: “string”,
// Error code.
// Can be empty.
// Should be non empty if the state is Failed.
// enum values:
// -  unknown : any error that does not fit another codes.
// -  amountIsTooSmall : amount is too small to execute
// transaction
// -  notEnoughBalance : transaction can’t be executed due
// to balance insufficiency on the source address.
“errorCode”: “enum”,
// Incremental ID of the moment, when the transaction
// state changing is detected. It should be the same
// sequence as for block in the  [GET] /api/balances
// response. In other words block number/height.
    “block”: integer64
}

Errors:

* `204 No content`  - specified transaction not found