Codificación / decodificación Base58 de direcciones en Micheline

Las direcciones optimizadastienen 22bytes,que siguenel siguienteformato:

• Elprimerbytees unaetiqueta,ya sea 00paraimplícito (tz) o 01para originado (KT)

Sielprimerbytees 00 yestamostrabajando con una direcciónimplícita (tz),entonces:

• El segundobyte describe la curva ypor lotantoelprefijo. Estoes 00 (ed25519/tz1),01 (secp256k1/tz2) o 02 (p256/tz3)
• Los 20bytes restantes son la dirección

Sielprimerbytees 01 yestamostrabajando con una dirección de origen (KT),entonces:

• Los siguientes 20bytes son la dirección
• El últimobytees unbúfer 00 (para completar la longitud a 22bytes)

Para convertirelformulario optimizadoen una dirección,puede usareztz y hacer algo comoesto:

 function getAddressFromOptimized(hex){
  var address, prefix;
  if (hex.substring(0,2) == "00") {
    if (hex.substring(2,4) == "00") prefix = eztz.prefix.tz1;
    if (hex.substring(2,4) == "01") prefix = eztz.prefix.tz2;
    if (hex.substring(2,4) == "02") prefix = eztz.prefix.tz3;
    address = hex.substring(4,44);
  } else if (hex.substring(0,2) == "01"){
    prefix = eztz.prefix.KT;
    address = hex.substring(2,42);
  }
  return eztz.utility.b58cencode(eztz.utility.hex2buf(address), prefix);
}
console.log(getAddressFromOptimized("011cd5f135e80fd8ebb6e43335b24ca6116edeba6900")) 
 

Elformatoestá documentado aquí: http://tezos.gitlab.io/mainnet/api/p2p.html#contract-id-22-bytes-8-bit-tag

Optimized addresses are 22 bytes, which follows the following format:

• The first byte is a tag, either 00 for implicit (tz) or 01 for originated (KT)

If the first byte is 00 and we are working with an implicit (tz) address, then:

• The second byte describes the curve and therefore the prefix. This is either 00 (ed25519/tz1), 01 (secp256k1/tz2) or 02 (p256/tz3)
• The remaining 20 bytes is the address

If the first byte is 01 and we are working with an originated (KT) address, then:

• The next 20 bytes are the address
• The last byte is a 00 buffer (to pad the length to 22 bytes)

To convert the optimized form to an address, you can use eztz and do something like this:

function getAddressFromOptimized(hex){
  var address, prefix;
  if (hex.substring(0,2) == "00") {
    if (hex.substring(2,4) == "00") prefix = eztz.prefix.tz1;
    if (hex.substring(2,4) == "01") prefix = eztz.prefix.tz2;
    if (hex.substring(2,4) == "02") prefix = eztz.prefix.tz3;
    address = hex.substring(4,44);
  } else if (hex.substring(0,2) == "01"){
    prefix = eztz.prefix.KT;
    address = hex.substring(2,42);
  }
  return eztz.utility.b58cencode(eztz.utility.hex2buf(address), prefix);
}
console.log(getAddressFromOptimized("011cd5f135e80fd8ebb6e43335b24ca6116edeba6900")) 

The format is documented here: http://tezos.gitlab.io/mainnet/api/p2p.html#contract-id-22-bytes-8-bit-tag

Creo que deberíapoder utilizar labiblioteca eztz de Stephen Andrewspara acceder a varias herramientas desdeunentornojs

Me atrevería aespecular que lafunciónesesta one donde usael prefijo KT

   b58cencode: function (payload, prefix) {
    const n = new Uint8Array(prefix.length + payload.length);
    n.set(prefix);
    n.set(payload, prefix.length);
    return library.bs58check.encode(new Buffer(n, 'hex'));
  }
 

I believe you should be able to make use of Stephen Andrews eztz library to access various tools from a js environment

I would speculate the function is this one where you use the KT prefix

  b58cencode: function (payload, prefix) {
    const n = new Uint8Array(prefix.length + payload.length);
    n.set(prefix);
    n.set(payload, prefix.length);
    return library.bs58check.encode(new Buffer(n, 'hex'));
  }