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< / pre > < pre class = "rust" > < code > < span class = "kw" > use < / span > solana_client::{
client_error::Result < span class = "kw" > as < / span > ClientResult, rpc_client::RpcClient, rpc_request::RpcError,
};
< span class = "kw" > use < / span > solana_sdk::transaction::Transaction;
< 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,
};
< span class = "kw" > use < / span > std::{thread, time};
< span class = "comment" > // #[allow(dead_code)]
// pub fn retry< T> (request: impl Fn() -> Result< T, anchor_client::ClientError> ) -> anyhow::Result< T> {
// for _i in 0..5 {
// match request() {
// Ok(res) => return Ok(res),
// Err(err) => {
// // TODO: only retry for recoverable errors
// log::error!(" {:#?}" , err);
// continue;
// }
// }
// }
// Err(anyhow!(" Retry failed" ))
// }
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< / span > < span class = "doccomment" > /// Some Result< > types don' t convert to anyhow::Result nicely. Force them through stringification.
< / span > < span class = "kw" > pub trait < / span > AnyhowWrap {
< span class = "kw" > type < / span > Value;
< 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> {
< span class = "kw" > type < / span > Value = T;
< span class = "kw" > fn < / span > map_err_anyhow(< span class = "self" > self< / span > ) -> anyhow::Result< < span class = "self" > Self< / span > ::Value> {
< span class = "self" > self< / span > .map_err(|err| < span class = "macro" > anyhow::anyhow!< / span > (< span class = "string" > " {:?}" < / span > , err))
}
}
< span class = "doccomment" > /// Push to an async_channel::Sender and ignore if the channel is full
< / span > < span class = "kw" > pub trait < / span > AsyncChannelSendUnlessFull< T> {
< span class = "doccomment" > /// Send a message if the channel isn' t full
< / 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> > ;
}
< span class = "kw" > impl< / span > < T> AsyncChannelSendUnlessFull< T> < span class = "kw" > for < / span > async_channel::Sender< T> {
< 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> > {
< span class = "kw" > use < / span > async_channel::< span class = "kw-2" > *< / span > ;
< span class = "kw" > match < / span > < span class = "self" > self< / span > .try_send(msg) {
< span class = "prelude-val" > Ok< / span > (()) => < span class = "prelude-val" > Ok< / span > (()),
< span class = "prelude-val" > Err< / span > (TrySendError::Closed(msg)) => < span class = "prelude-val" > Err< / span > (async_channel::SendError(msg)),
< span class = "prelude-val" > Err< / span > (TrySendError::Full(< span class = "kw" > _< / span > )) => < span class = "prelude-val" > Ok< / span > (()),
}
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}
}
< span class = "doccomment" > /// A copy of RpcClient::send_and_confirm_transaction that returns the slot the
/// transaction confirmed in.
< / span > < span class = "kw" > pub fn < / span > send_and_confirm_transaction(
rpc_client: < span class = "kw-2" > & < / span > RpcClient,
transaction: < span class = "kw-2" > & < / span > Transaction,
) -> ClientResult< (Signature, Slot)> {
< span class = "kw" > const < / span > SEND_RETRIES: usize = < span class = "number" > 1< / span > ;
< span class = "kw" > const < / span > GET_STATUS_RETRIES: usize = usize::MAX;
< span class = "lifetime" > ' sending< / span > : < span class = "kw" > for _ in < / span > < span class = "number" > 0< / span > ..SEND_RETRIES {
< span class = "kw" > let < / span > signature = rpc_client.send_transaction(transaction)< span class = "question-mark" > ?< / span > ;
< span class = "kw" > let < / span > recent_blockhash = < span class = "kw" > if < / span > uses_durable_nonce(transaction).is_some() {
< span class = "kw" > let < / span > (recent_blockhash, ..) =
rpc_client.get_latest_blockhash_with_commitment(CommitmentConfig::processed())< span class = "question-mark" > ?< / span > ;
recent_blockhash
} < span class = "kw" > else < / span > {
transaction.message.recent_blockhash
};
< span class = "kw" > for < / span > status_retry < span class = "kw" > in < / span > < span class = "number" > 0< / span > ..GET_STATUS_RETRIES {
< span class = "kw" > let < / span > response = rpc_client.get_signature_statuses(< span class = "kw-2" > & < / span > [signature])< span class = "question-mark" > ?< / span > .value;
< span class = "kw" > match < / span > response[< span class = "number" > 0< / span > ]
.clone()
.filter(|result| result.satisfies_commitment(rpc_client.commitment()))
{
< 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" > ?
< / span > {
< span class = "comment" > // Block hash is not found by some reason
< / 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.
< / span > & & status_retry < GET_STATUS_RETRIES
{
< span class = "comment" > // Retry twice a second
< / 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())
}
< / code > < / pre > < / div >
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