programSubscribe RPC Method

Parameters

program_id

string

The Pubkey encoded base-58 string

object

array

The configuration object with the following fields:

commitment

All fields are strings.

finalized

the node will query the most recent block confirmed by supermajority of the cluster as having reached maximum lockout, meaning the cluster has recognized this block as finalized.

confirmed

the node will query the most recent block that has been voted on by supermajority of the cluster.

processed

the node will query its most recent block. Note that the block may not be complete.

encoding

string

The encoding format for account data. It can be one of base58 (slow), base64, base64+zstd or jsonParsed

filters

string

The filter results using various filter objects; The account must meet all filter criteria to be included in results

Returns

result

integer

The result will be an RpcResponse JSON object with id equal to the subscription id (needed to unsubscribe)

Notification Format:

The notification format is the same as seen in the getProgramAccounts RPC HTTP method

Request

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const web3 = require("@solana/web3.js");
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(async () => {
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  const publicKey = new web3.PublicKey(
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    "22Y43yTVxuUkoRKdm9thyRhQ3SdgQS7c7kB6UNCiaczD"
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  );
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  const solanaConnection = new web3.Connection("https://docs-demo.solana-mainnet.quiknode.pro/", {
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    wsEndpoint: "",
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  });
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  solanaConnection.onProgramAccountChange(
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    publicKey,
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    (updatedProgramInfo, context) =>
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      console.log("Updated program info: ", updatedProgramInfo),
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    "confirmed"
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  );
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})();
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