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use crate::{Error, Sdk};
use bip37_bloom_filter::{BloomFilter, BloomFilterData};
use dapi_grpc::core::v0::{
transactions_with_proofs_request, transactions_with_proofs_response, GetTransactionRequest,
GetTransactionResponse, TransactionsWithProofsRequest, TransactionsWithProofsResponse,
};
use dapi_grpc::platform::v0::{
get_epochs_info_request, get_epochs_info_response, GetEpochsInfoRequest, GetEpochsInfoResponse,
};
use dpp::dashcore::consensus::Decodable;
use dpp::dashcore::{Address, InstantLock, MerkleBlock, OutPoint, Transaction, Txid};
use dpp::identity::state_transition::asset_lock_proof::chain::ChainAssetLockProof;
use dpp::identity::state_transition::asset_lock_proof::InstantAssetLockProof;
use dpp::prelude::AssetLockProof;
use rs_dapi_client::{DapiRequestExecutor, RequestSettings};
use std::time::Duration;
use tokio::time::{sleep, timeout};
impl Sdk {
/// Starts the stream to listen for instant send lock messages
pub async fn start_instant_send_lock_stream(
&self,
from_block_hash: Vec<u8>,
address: &Address,
) -> Result<dapi_grpc::tonic::Streaming<TransactionsWithProofsResponse>, Error> {
let address_bytes = address.as_unchecked().payload_to_vec();
// create the bloom filter
let bloom_filter = BloomFilter::builder(1, 0.001)
.expect("this FP rate allows up to 10000 items")
.add_element(&address_bytes)
.build();
let bloom_filter_proto = {
let BloomFilterData {
v_data,
n_hash_funcs,
n_tweak,
n_flags,
} = bloom_filter.into();
dapi_grpc::core::v0::BloomFilter {
v_data,
n_hash_funcs,
n_tweak,
n_flags,
}
};
let core_transactions_stream = TransactionsWithProofsRequest {
bloom_filter: Some(bloom_filter_proto),
count: 0, // Subscribing to new transactions as well
send_transaction_hashes: true,
from_block: Some(transactions_with_proofs_request::FromBlock::FromBlockHash(
from_block_hash,
)),
};
self.execute(core_transactions_stream, RequestSettings::default())
.await
.map_err(|e| Error::DapiClientError(e.to_string()))
}
/// Waits for a response for the asset lock proof
pub async fn wait_for_asset_lock_proof_for_transaction(
&self,
mut stream: dapi_grpc::tonic::Streaming<TransactionsWithProofsResponse>,
transaction: &Transaction,
time_out: Option<Duration>,
) -> Result<AssetLockProof, Error> {
let transaction_id = transaction.txid();
let _span = tracing::debug_span!(
"wait_for_asset_lock_proof_for_transaction",
transaction_id = transaction_id.to_string(),
)
.entered();
tracing::debug!("waiting for messages from stream");
// Define an inner async block to handle the stream processing.
let stream_processing = async {
loop {
// TODO: We should retry if Err is returned
let message = stream
.message()
.await
.map_err(|e| Error::DapiClientError(format!("can't receive message: {e}")))?;
let Some(TransactionsWithProofsResponse { responses }) = message else {
return Err(Error::DapiClientError(
"stream closed unexpectedly".to_string(),
));
};
match responses {
Some(
transactions_with_proofs_response::Responses::InstantSendLockMessages(
instant_send_lock_messages,
),
) => {
tracing::debug!(
"received {} instant lock message(s)",
instant_send_lock_messages.messages.len()
);
for instant_lock_bytes in instant_send_lock_messages.messages {
let instant_lock =
InstantLock::consensus_decode(&mut instant_lock_bytes.as_slice())
.map_err(|e| {
tracing::error!("invalid asset lock: {}", e);
Error::CoreError(e.into())
})?;
if instant_lock.txid == transaction_id {
let asset_lock_proof =
AssetLockProof::Instant(InstantAssetLockProof {
instant_lock,
transaction: transaction.clone(),
output_index: 0,
});
tracing::debug!(
?asset_lock_proof,
"instant lock is matching to the broadcasted transaction, returning instant asset lock proof"
);
return Ok(asset_lock_proof);
} else {
tracing::debug!(
"instant lock is not matching, waiting for the next message"
);
}
}
}
Some(transactions_with_proofs_response::Responses::RawMerkleBlock(
raw_merkle_block,
)) => {
tracing::debug!("received merkle block");
let merkle_block =
MerkleBlock::consensus_decode(&mut raw_merkle_block.as_slice())
.map_err(|e| {
tracing::error!("can't decode merkle block: {}", e);
Error::CoreError(e.into())
})?;
let mut matches: Vec<Txid> = vec![];
let mut index: Vec<u32> = vec![];
merkle_block.extract_matches(&mut matches, &mut index)?;
// Continue receiving messages until we find the transaction
if !matches.contains(&transaction_id) {
tracing::debug!(
"merkle block doesn't contain the transaction, waiting for the next message"
);
continue;
}
tracing::debug!(
"merkle block contains the transaction, obtaining core chain locked height"
);
// TODO: This a temporary implementation until we have headers stream running in background
// so we can always get actual height and chain locks
// Wait until the block is chainlocked
let mut core_chain_locked_height;
loop {
let GetTransactionResponse {
height,
is_chain_locked,
..
} = self
.execute(
GetTransactionRequest {
id: transaction_id.to_string(),
},
RequestSettings::default(),
)
.await?;
core_chain_locked_height = height;
if is_chain_locked {
break;
}
tracing::trace!("the transaction is on height {} but not chainlocked. try again in 1 sec", height);
sleep(Duration::from_secs(1)).await;
}
tracing::debug!(
"the transaction is chainlocked on height {}, waiting platform for reaching the same core height",
core_chain_locked_height
);
// Wait until platform chain is on the block's chain locked height
loop {
let request = GetEpochsInfoRequest {
version: Some(get_epochs_info_request::Version::V0(
get_epochs_info_request::GetEpochsInfoRequestV0 {
start_epoch: Some(0),
count: 1,
..Default::default()
},
)),
};
let GetEpochsInfoResponse {
version:
Some(get_epochs_info_response::Version::V0(
get_epochs_info_response::GetEpochsInfoResponseV0 {
metadata: Some(metadata),
..
},
)),
} = self.execute(request, RequestSettings::default()).await?
else {
return Err(Error::DapiClientError(String::from(
"missing V0 `metadata` field",
)));
};
if metadata.core_chain_locked_height >= core_chain_locked_height {
break;
}
tracing::trace!(
"platform chain locked core height {} but we need {}. try again in 1 sec",
metadata.core_chain_locked_height,
core_chain_locked_height,
);
sleep(Duration::from_secs(1)).await;
}
let asset_lock_proof = AssetLockProof::Chain(ChainAssetLockProof {
core_chain_locked_height,
out_point: OutPoint {
txid: transaction.txid(),
vout: 0,
},
});
tracing::debug!(
?asset_lock_proof,
"merkle block contains the broadcasted transaction, returning chain asset lock proof"
);
return Ok(asset_lock_proof);
}
Some(transactions_with_proofs_response::Responses::RawTransactions(_)) => {
tracing::trace!("received transaction(s), ignoring")
}
None => tracing::trace!(
"received empty response as a workaround for the bug in tonic, ignoring"
),
}
}
};
// Apply the timeout if `time_out_ms` is Some, otherwise just await the processing.
match time_out {
Some(duration) => timeout(duration, stream_processing).await.map_err(|_| {
Error::TimeoutReached(duration, String::from("receiving asset lock proof"))
})?,
None => stream_processing.await,
}
}
}