Describir: Understanding transactions /

  _____    _    _    ______    _    _     ______     ___              
 /  ___|| | || | || |      \\ | || | ||  /_   _//   / _ \\    ____    
| // __   | || | || |  --  // | || | ||  `-| |,-   | / \ ||  |    \\  
| \\_\ || | \\_/ || |  --  \\ | \\_/ ||    | ||    | \_/ ||  | [] ||  
 \____//   \____//  |______//  \____//     |_||     \___//   |  __//  
  `---`     `---`   `------`    `---`      `-`'     `---`    |_|`-`   
                                                             `-`      
   ___    
  / _ \\  
 / //\ \\ 
|  ___  ||
|_||  |_||
`-`   `-`