user92269: Are there anyone know how to convert P2SH address (like 34A5PyCvPJKYtHmj9jmKhGzBBwpGuAkZog) to MANDhrctLRAygo3dFckfWvEaWeQizSwWNK?
I tried to decode with Base58Check, then removed 05 and added  032, then encode it (Base58Check), however I got wrong result MANDhrctLRAygo3dFckfWvEaWeQiti143C

user90837: The reason you are getting a different address is because you are appending the same checksum that you got from using the 03 prefix to the new prefix + payload. You need to double hash the new prefix + payload and then append the first four bytes and then encode it in base58.
If I decode your result MANDhrctLRAygo3dFckfWvEaWeQiti143C to hexadecimal, I get 321b0e61ac671bde7fb52e2f3d6e2dc213609d9de5020cb31b. In this hexadecimal string, your prefix is 32, payload is 1b0e61ac671bde7fb52e2f3d6e2dc213609d9de5, and checksum is 020cb31b.  
The checksum that you would get after double hashing the new prefix + payload is e29f4248. So, you should base58 encode 321b0e61ac671bde7fb52e2f3d6e2dc213609d9de5e29f4248

92269: <p>Are there anyone know how to convert P2SH address (like <code>34A5PyCvPJKYtHmj9jmKhGzBBwpGuAkZog</code>) to <code>MANDhrctLRAygo3dFckfWvEaWeQizSwWNK</code>?</p>

<p>I tried to decode with <code>Base58Check</code>, then removed <code>05</code> and added  <code>032</code>, then encode it (<code>Base58Check</code>), however I got wrong result <code>MANDhrctLRAygo3dFckfWvEaWeQiti143C</code></p>
 90837: <p>The reason you are getting a different address is because you are appending the same checksum that you got from using the <code>03</code> prefix to the new <code>prefix + payload</code>. You need to double hash the new <code>prefix + payload</code> and then append the first four bytes and then encode it in base58.</p>

<p>If I decode your result <code>MANDhrctLRAygo3dFckfWvEaWeQiti143C</code> to hexadecimal, I get <code>321b0e61ac671bde7fb52e2f3d6e2dc213609d9de5020cb31b</code>. In this hexadecimal string, your prefix is <code>32</code>, payload is <code>1b0e61ac671bde7fb52e2f3d6e2dc213609d9de5</code>, and checksum is <code>020cb31b</code>.  </p>

<p>The checksum that you would get after double hashing the new <code>prefix + payload</code> is <code>e29f4248</code>. So, you should base58 encode <code>321b0e61ac671bde7fb52e2f3d6e2dc213609d9de5e29f4248</code></p>
