forward-project/src/actions/transaction.js

export const SELECT_TRANSACTION = 'SELECT_TRANSACTION';

export const addTransaction = (state_transaction, select_transaction) => (dispatch, getState) => { 
    
    const length = Object.keys(state_transaction).length;
    state_transaction[length] = select_transaction;

    dispatch({
        type: SELECT_TRANSACTION,
        transactions : state_transaction
    });
}