08 Feb Solana: Decoding data from accountSubscribe Websocket method. RUST
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Decoding data from Accountsubscribe Websocket Method in Solana With Rust
The Accountsubscribe WSS (websockets subscriptions) method is a powerful tool for fetching subscription-related data on the Solana Blockchain. When used correctly, it can provide valuable insights into your asset's vault holdings and transactions. However, decoding the base64-encoded JSON Payload received from the server can be challenging.
In this article, we will explore how to decode the date sent by accountsubscribe using rust, focusing on the specific requirements of Solana-based wallet addresses, such as "base" and "quote" assets.
Prerequisites
Before diving into the code, ensure you have:
- A Solana Node Running (E.G., Solflare)
- TheSolana-Websocket
Crate Installed in Your Rust Project
- Basic Understanding of Solana's Accountsubscribe API
Example Code
Below is an example of how to fetch data fromAccountsubscribe using theSolana-Websocket Crate:
`rust
Use solana_sdk :: {Accountinfo, Pubkey};
Use solana_websocket :: {subscriptionResponse, subscriptions};
#[tokio :: Main]
async fn main () {
// initialize your Solana Node
Let (context, accounts) = tokio :: Spawn (Solana_node :: Init ());
// Subscribe to Accountsubscribe Events
Let subscription_options = subscriptions :: NEW (
Contextpubkey,
PUBKEY :: NEW (“Your-Accounts”),
);
Let subscription_response = tokio :: run (subscription_options);
// parse the response as json
Let JSON: Serde_json :: Value = SERDE_JSON :: From_str (& subscription_response) .Urap ();
// loop through each account and print its details
for (account_id, info) in json [“accounts”]. ITER () {
println! (“Account ID: {}”, account_id);
println! (“Pubkey: {}”, info.pubkey.to_string ());
println! (“Owner: {}”, info.owner.value ());
println! (“Type: {}”, info.type_.value ());
// …
}
}
// define the subscription options
#[Derive (default)]
Struct subscriptions {
Pubkey: Pubkey,
}
`
In this exam, we initialize a solana node using tokio :: Spawn, then subscribe to accountsubsubscribe events. We parse the response as JSON and loop through each account, printing its details.
Decoding Base64-Encoded Data
When receiving the JSON response from Accountsubscribe, it’s base64-encoded. To decode this data, we can use the following steps:
- Unpack the Response into a JSON Object Using
Serde_json :: From_str.
- Decode any Binary Data within the JSON Object.
Here’s an example of how to handle these steps:
`rust
Use Serde :: {Deserialize, Serialize};
Use base64;
#[Derive (default)]
Struct SubscriptionResponse {
Accounts: Vec
}
Imples Serde_JSon :: Map for subscriptions {
FN Get (& Self, Key: & Str) -> Option <& Serde_json :: Value> {
Match Self [Key] {
Some (value) => value,
None => none,
}
}
fn as_bytes (& loans) -> option
Match.as_ref () {
Some (map) => map.get (“accounts”). Map (| value | base64 :: decode (value) .unwrap ()),
_ => None,
}
}
}
`
In this example, we define a subscriptionResponse Struct that implementsSerde_json :: Map. We also implement the necessary methods to handle decoding binary data within the JSON object.
Finally, when parsing the response as json and calling as_bytes, we use thebase64 :: decodemethodmethodmethodmethodmethod to decode any binary data present in the JSon object. If no binary data is found, the method returns none.
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