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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `client/src/util.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>util.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-1f7d512b176f0f72.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Bold-124a1ca42af929b6.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-6827029ac823cab7.css" id="mainThemeStyle"><link rel="stylesheet" id="themeStyle" href="../../static.files/light-ebce58d0a40c3431.css"><link rel="stylesheet" disabled href="../../static.files/dark-f23faae4a2daf9a6.css"><link rel="stylesheet" disabled href="../../static.files/ayu-8af5e100b21cd173.css"><script id="default-settings" ></script><script src="../../static.files/storage-d43fa987303ecbbb.js"></script><script defer src="../../static.files/source-script-5cf2e01a42cc9858.js"></script><script defer src="../../source-files.js"></script><script defer src="../../static.files/main-c55e1eb52e1886b4.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-13285aec31fa243e.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../client/index.html"><img class="rust-logo" src="../../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></a><form class="search-form"><span></span><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-5ec35bf9ca753509.svg"></a></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><a href="#1" id="1">1</a>
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</pre><pre class="rust"><code><span class="kw">use </span>solana_client::{
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client_error::Result <span class="kw">as </span>ClientResult, rpc_client::RpcClient, rpc_request::RpcError,
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};
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<span class="kw">use </span>solana_sdk::transaction::Transaction;
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<span class="kw">use </span>solana_sdk::{
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clock::Slot,
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commitment_config::CommitmentConfig,
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signature::{Keypair, Signature},
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transaction::uses_durable_nonce,
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};
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<span class="kw">use </span>std::{thread, time};
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<span class="comment">// #[allow(dead_code)]
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// pub fn retry<T>(request: impl Fn() -> Result<T, anchor_client::ClientError>) -> anyhow::Result<T> {
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// for _i in 0..5 {
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// match request() {
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// Ok(res) => return Ok(res),
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// Err(err) => {
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// // TODO: only retry for recoverable errors
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// log::error!("{:#?}", err);
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// continue;
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// }
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// }
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// }
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// Err(anyhow!("Retry failed"))
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// }
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</span><span class="kw">pub trait </span>MyClone {
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<span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self</span>;
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}
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<span class="kw">impl </span>MyClone <span class="kw">for </span>Keypair {
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<span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> Keypair {
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<span class="self">Self</span>::from_bytes(<span class="kw-2">&</span><span class="self">self</span>.to_bytes()).unwrap()
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}
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}
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<span class="doccomment">/// A copy of RpcClient::send_and_confirm_transaction that returns the slot the
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/// transaction confirmed in.
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</span><span class="kw">pub fn </span>send_and_confirm_transaction(
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rpc_client: <span class="kw-2">&</span>RpcClient,
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transaction: <span class="kw-2">&</span>Transaction,
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) -> ClientResult<(Signature, Slot)> {
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<span class="kw">const </span>SEND_RETRIES: usize = <span class="number">1</span>;
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<span class="kw">const </span>GET_STATUS_RETRIES: usize = usize::MAX;
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<span class="lifetime">'sending</span>: <span class="kw">for _ in </span><span class="number">0</span>..SEND_RETRIES {
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<span class="kw">let </span>signature = rpc_client.send_transaction(transaction)<span class="question-mark">?</span>;
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<span class="kw">let </span>recent_blockhash = <span class="kw">if </span>uses_durable_nonce(transaction).is_some() {
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<span class="kw">let </span>(recent_blockhash, ..) =
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rpc_client.get_latest_blockhash_with_commitment(CommitmentConfig::processed())<span class="question-mark">?</span>;
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recent_blockhash
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} <span class="kw">else </span>{
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transaction.message.recent_blockhash
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};
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<span class="kw">for </span>status_retry <span class="kw">in </span><span class="number">0</span>..GET_STATUS_RETRIES {
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<span class="kw">let </span>response = rpc_client.get_signature_statuses(<span class="kw-2">&</span>[signature])<span class="question-mark">?</span>.value;
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<span class="kw">match </span>response[<span class="number">0</span>]
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.clone()
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.filter(|result| result.satisfies_commitment(rpc_client.commitment()))
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{
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<span class="prelude-val">Some</span>(tx_status) => {
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<span class="kw">return if let </span><span class="prelude-val">Some</span>(e) = tx_status.err {
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<span class="prelude-val">Err</span>(e.into())
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} <span class="kw">else </span>{
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<span class="prelude-val">Ok</span>((signature, tx_status.slot))
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};
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}
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<span class="prelude-val">None </span>=> {
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<span class="kw">if </span>!rpc_client
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.is_blockhash_valid(<span class="kw-2">&</span>recent_blockhash, CommitmentConfig::processed())<span class="question-mark">?
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</span>{
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<span class="comment">// Block hash is not found by some reason
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</span><span class="kw">break </span><span class="lifetime">'sending</span>;
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} <span class="kw">else if </span><span class="macro">cfg!</span>(not(test))
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<span class="comment">// Ignore sleep at last step.
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</span>&& status_retry < GET_STATUS_RETRIES
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{
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<span class="comment">// Retry twice a second
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</span>thread::sleep(time::Duration::from_millis(<span class="number">500</span>));
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<span class="kw">continue</span>;
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}
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}
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}
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}
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}
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<span class="prelude-val">Err</span>(RpcError::ForUser(
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<span class="string">"unable to confirm transaction. \
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This can happen in situations such as transaction expiration \
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and insufficient fee-payer funds"
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</span>.to_string(),
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)
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.into())
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}
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</code></pre></div>
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