getTxBalance input style conflicts with data from wallet-headless

[alexruzenhack]

This method getTxBalance accepts the input tx: IHistoryTx and IHistoryTx is presented by data in snake case style, as we can see bellow:

export interface IHistoryTx {
  tx_id: string;
  signalBits: number;
  version: number;
  weight: number;
  timestamp: number;
  is_voided: boolean;
  nonce: number,
  inputs: IHistoryInput[];
  outputs: IHistoryOutput[];
  parents: string[];
  token_name?: string; // For create token transaction
  token_symbol?: string; // For create token transaction
  tokens: string[];
  height?: number;
}

However the data in the wallet-headless project is defined in camel case style, therefore causing some issues of data compatibility, which force us to duplicate some properties to comply with the snake style too. See the example bellow extracted from the method decodeTx in the wallet.controller.js:

{
  txId: input.hash,
  index: input.index,
  decoded: utxo.decoded,
  token: utxo.token,
  value: utxo.value,
  // This is required by transactionUtils.getTxBalance
  // It should be ignored by users
  token_data: utxo.token_data,
  // User facing duplication to keep scheme consistency
  tokenData: utxo.token_data,
  script: utxo.script,
  signed: !!input.data,
  mine: await req.wallet.isAddressMine(utxo.decoded.address),
},

Should we commit with only one style throughout our projects?