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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 `lib/client/src/util.rs`."><title>util.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.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-a2c9cd1067f8b328.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-c4dbdcde0fbd8430.css" id="mainThemeStyle"><link rel="stylesheet" id="themeStyle" href="../../static.files/light-db279b6232be9c13.css"><link rel="stylesheet" disabled href="../../static.files/dark-cf923f49f397b216.css"><link rel="stylesheet" disabled href="../../static.files/ayu-be46fdc453a55015.css"><script src="../../static.files/storage-3891ce972e3a2bf8.js"></script><script defer src="../../static.files/source-script-1b95b7cca98b26e5.js"></script><script defer src="../../source-files.js"></script><script defer src="../../static.files/main-98a684e84ae5b08b.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><nav class="sub"><a class="sub-logo-container" href="../../mango_v4_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-7b819b6101059cd0.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::compute_budget::ComputeBudgetInstruction;
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<span class="kw">use </span>solana_sdk::instruction::Instruction;
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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, commitment_config::CommitmentConfig, signature::Signature,
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transaction::uses_durable_nonce,
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};
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<span class="kw">use </span>anchor_lang::prelude::{AccountMeta, Pubkey};
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<span class="kw">use </span>anyhow::Context;
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<span class="kw">use </span>std::{thread, time};
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<span class="doccomment">/// Some Result<> types don't convert to anyhow::Result nicely. Force them through stringification.
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</span><span class="kw">pub trait </span>AnyhowWrap {
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<span class="kw">type </span>Value;
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<span class="kw">fn </span>map_err_anyhow(<span class="self">self</span>) -> anyhow::Result<<span class="self">Self</span>::Value>;
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}
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<span class="kw">impl</span><T, E: std::fmt::Debug> AnyhowWrap <span class="kw">for </span><span class="prelude-ty">Result</span><T, E> {
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<span class="kw">type </span>Value = T;
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<span class="kw">fn </span>map_err_anyhow(<span class="self">self</span>) -> anyhow::Result<<span class="self">Self</span>::Value> {
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<span class="self">self</span>.map_err(|err| <span class="macro">anyhow::anyhow!</span>(<span class="string">"{:?}"</span>, err))
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}
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}
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<span class="doccomment">/// Push to an async_channel::Sender and ignore if the channel is full
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</span><span class="kw">pub trait </span>AsyncChannelSendUnlessFull<T> {
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<span class="doccomment">/// Send a message if the channel isn't full
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</span><span class="kw">fn </span>send_unless_full(<span class="kw-2">&</span><span class="self">self</span>, msg: T) -> <span class="prelude-ty">Result</span><(), async_channel::SendError<T>>;
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}
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<span class="kw">impl</span><T> AsyncChannelSendUnlessFull<T> <span class="kw">for </span>async_channel::Sender<T> {
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<span class="kw">fn </span>send_unless_full(<span class="kw-2">&</span><span class="self">self</span>, msg: T) -> <span class="prelude-ty">Result</span><(), async_channel::SendError<T>> {
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<span class="kw">use </span>async_channel::<span class="kw-2">*</span>;
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<span class="kw">match </span><span class="self">self</span>.try_send(msg) {
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<span class="prelude-val">Ok</span>(()) => <span class="prelude-val">Ok</span>(()),
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<span class="prelude-val">Err</span>(TrySendError::Closed(msg)) => <span class="prelude-val">Err</span>(async_channel::SendError(msg)),
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<span class="prelude-val">Err</span>(TrySendError::Full(<span class="kw">_</span>)) => <span class="prelude-val">Ok</span>(()),
|
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}
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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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|
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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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||
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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>;
|
||
recent_blockhash
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} <span class="kw">else </span>{
|
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transaction.message.recent_blockhash
|
||
};
|
||
|
||
<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>]
|
||
.clone()
|
||
.filter(|result| result.satisfies_commitment(rpc_client.commitment()))
|
||
{
|
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<span class="prelude-val">Some</span>(tx_status) => {
|
||
<span class="kw">return if let </span><span class="prelude-val">Some</span>(e) = tx_status.err {
|
||
<span class="prelude-val">Err</span>(e.into())
|
||
} <span class="kw">else </span>{
|
||
<span class="prelude-val">Ok</span>((signature, tx_status.slot))
|
||
};
|
||
}
|
||
<span class="prelude-val">None </span>=> {
|
||
<span class="kw">if </span>!rpc_client
|
||
.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>;
|
||
} <span class="kw">else if </span><span class="macro">cfg!</span>(not(test))
|
||
<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>));
|
||
<span class="kw">continue</span>;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="prelude-val">Err</span>(RpcError::ForUser(
|
||
<span class="string">"unable to confirm transaction. \
|
||
This can happen in situations such as transaction expiration \
|
||
and insufficient fee-payer funds"
|
||
</span>.to_string(),
|
||
)
|
||
.into())
|
||
}
|
||
|
||
<span class="doccomment">/// Convenience function used in binaries to set up the fmt tracing_subscriber,
|
||
/// with cololring enabled only if logging to a terminal and with EnvFilter.
|
||
</span><span class="kw">pub fn </span>tracing_subscriber_init() {
|
||
<span class="kw">let </span>format = tracing_subscriber::fmt::format().with_ansi(atty::is(atty::Stream::Stdout));
|
||
|
||
tracing_subscriber::fmt()
|
||
.with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
|
||
.event_format(format)
|
||
.init();
|
||
}
|
||
|
||
<span class="kw">pub async fn </span>http_error_handling<T: serde::de::DeserializeOwned>(
|
||
response: reqwest::Response,
|
||
) -> anyhow::Result<T> {
|
||
<span class="kw">let </span>status = response.status();
|
||
<span class="kw">let </span>response_text = response
|
||
.text()
|
||
.<span class="kw">await
|
||
</span>.context(<span class="string">"awaiting body of http request"</span>)<span class="question-mark">?</span>;
|
||
<span class="kw">if </span>!status.is_success() {
|
||
<span class="macro">anyhow::bail!</span>(<span class="string">"http request failed, status: {status}, body: {response_text}"</span>);
|
||
}
|
||
serde_json::from_str::<T>(<span class="kw-2">&</span>response_text)
|
||
.with_context(|| <span class="macro">format!</span>(<span class="string">"response has unexpected format, body: {response_text}"</span>))
|
||
}
|
||
|
||
<span class="kw">pub fn </span>to_readonly_account_meta(pubkey: Pubkey) -> AccountMeta {
|
||
AccountMeta {
|
||
pubkey,
|
||
is_writable: <span class="bool-val">false</span>,
|
||
is_signer: <span class="bool-val">false</span>,
|
||
}
|
||
}
|
||
|
||
<span class="kw">pub fn </span>to_writable_account_meta(pubkey: Pubkey) -> AccountMeta {
|
||
AccountMeta {
|
||
pubkey,
|
||
is_writable: <span class="bool-val">true</span>,
|
||
is_signer: <span class="bool-val">false</span>,
|
||
}
|
||
}
|
||
|
||
<span class="attr">#[derive(Default, Clone)]
|
||
</span><span class="kw">pub struct </span>PreparedInstructions {
|
||
<span class="kw">pub </span>instructions: Vec<Instruction>,
|
||
<span class="kw">pub </span>cu: u32,
|
||
}
|
||
|
||
<span class="kw">impl </span>PreparedInstructions {
|
||
<span class="kw">pub fn </span>new() -> <span class="self">Self </span>{
|
||
<span class="self">Self </span>{
|
||
instructions: <span class="macro">vec!</span>[],
|
||
cu: <span class="number">0</span>,
|
||
}
|
||
}
|
||
|
||
<span class="kw">pub fn </span>from_vec(instructions: Vec<Instruction>, cu: u32) -> <span class="self">Self </span>{
|
||
<span class="self">Self </span>{ instructions, cu }
|
||
}
|
||
|
||
<span class="kw">pub fn </span>from_single(instruction: Instruction, cu: u32) -> <span class="self">Self </span>{
|
||
<span class="self">Self </span>{
|
||
instructions: <span class="macro">vec!</span>[instruction],
|
||
cu,
|
||
}
|
||
}
|
||
|
||
<span class="kw">pub fn </span>push(<span class="kw-2">&mut </span><span class="self">self</span>, ix: Instruction, cu: u32) {
|
||
<span class="self">self</span>.instructions.push(ix);
|
||
<span class="self">self</span>.cu += cu;
|
||
}
|
||
|
||
<span class="kw">pub fn </span>append(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>other: <span class="self">Self</span>) {
|
||
<span class="self">self</span>.instructions.append(<span class="kw-2">&mut </span>other.instructions);
|
||
<span class="self">self</span>.cu += other.cu;
|
||
}
|
||
|
||
<span class="kw">pub fn </span>to_instructions(<span class="self">self</span>) -> Vec<Instruction> {
|
||
<span class="kw">let </span><span class="kw-2">mut </span>ixs = <span class="self">self</span>.instructions;
|
||
ixs.insert(<span class="number">0</span>, ComputeBudgetInstruction::set_compute_unit_limit(<span class="self">self</span>.cu));
|
||
ixs
|
||
}
|
||
|
||
<span class="kw">pub fn </span>is_empty(<span class="kw-2">&</span><span class="self">self</span>) -> bool {
|
||
<span class="self">self</span>.instructions.is_empty()
|
||
}
|
||
|
||
<span class="kw">pub fn </span>clear(<span class="kw-2">&mut </span><span class="self">self</span>) {
|
||
<span class="self">self</span>.instructions.clear();
|
||
<span class="self">self</span>.cu = <span class="number">0</span>;
|
||
}
|
||
|
||
<span class="kw">pub fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize {
|
||
<span class="self">self</span>.instructions.len()
|
||
}
|
||
}
|
||
</code></pre></div>
|
||
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