Fields meaning in RPC methods with websocket (accountSubscribe)

Question

I'm experimenting with the RPC methods using websockets from solana.py.

I didn't find a documentation describing precisely all fields in reply. As an example, AccountSubscribe methods should give the following (source):

{
  "jsonrpc": "2.0",
  "method": "accountNotification",
  "params": {
    "result": {
      "context": {
        "slot": 5199307
      },
      "value": {
        "data": [
          "11116bv5nS2h3y12kD1yUKeMZvGcKLSjQgX6BeV7u1FrjeJcKfsHPXHRDEHrBesJhZyqnnq9qJeUuF7WHxiuLuL5twc38w2TXNLxnDbjmuR",
          "base58"
        ],
        "executable": false,
        "lamports": 33594,
        "owner": "11111111111111111111111111111111",
        "rentEpoch": 635,
        "space": 80
      }
    },
    "subscription": 23784
  }
}

For example, the field data is encoded in base58. But the decoded data is not a string.

What is the format of the decoded data field ? How to decode (after base58 decoding) it ? How to interpret it ?

The same documentation says the notification format is the same as getAccountInfo. And getAccountInfo documentation says this:

data: <[string, encoding]|object> - data associated with the account, either as encoded binary data or JSON format {<program>: <state>} - depending on encoding parameter

Any clue ?

Answer 1

Depends on what data is in the account.

You will get the accountInfo, which has the sol balance, data etc and then you need to figure out how to decode the data in there which depends on the account type. Then you need to decode it depending on the type.

connection.onAccountChange(
      PDAaccountAddress,
      (accountInfo) => {
        // Account info type which has data and lamports and program id etc 

      }

For token accounts this would be this for example:

  const tokenAccountInfo = AccountLayout.decode(e.account.data);

For anchor programs you can use the program.decoder something like this:

connection.onAccountChange(pda, (account) => {
   var gameData program.coder.accounts.decode("playerData", account.data);
});