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Add helper fns to use in rpc spl-token filter checks
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@CriesofCarrots
CriesofCarrots committed Jul 10, 2024
1 parent 4f6cc50 commit 2f6bd1a
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Showing 2 changed files with 44 additions and 42 deletions.
16 changes: 16 additions & 0 deletions rpc-client-api/src/filter.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,10 @@ impl Memcmp {
}
}

pub fn offset(&self) -> usize {
self.offset
}

pub fn bytes(&self) -> Option<Cow<Vec<u8>>> {
use MemcmpEncodedBytes::*;
match &self.bytes {
Expand Down Expand Up @@ -203,6 +207,18 @@ impl Memcmp {
None => false,
}
}

/// Returns reference to bytes if variant is MemcmpEncodedBytes::Bytes;
/// otherwise returns None. Used exclusively by solana-rpc to check
/// SPL-token filters.
pub fn raw_bytes_as_ref(&self) -> Option<&[u8]> {
use MemcmpEncodedBytes::*;
if let Bytes(bytes) = &self.bytes {
Some(bytes)
} else {
None
}
}
}

#[cfg(test)]
Expand Down
70 changes: 28 additions & 42 deletions rpc/src/rpc.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ use {
solana_rpc_client_api::{
config::*,
custom_error::RpcCustomError,
filter::{Memcmp, MemcmpEncodedBytes, RpcFilterType},
filter::{Memcmp, RpcFilterType},
request::{
TokenAccountsFilter, DELINQUENT_VALIDATOR_SLOT_DISTANCE,
MAX_GET_CONFIRMED_BLOCKS_RANGE, MAX_GET_CONFIRMED_SIGNATURES_FOR_ADDRESS2_LIMIT,
Expand Down Expand Up @@ -2379,7 +2379,7 @@ fn encode_account<T: ReadableAccount>(
/// Analyze custom filters to determine if the result will be a subset of spl-token accounts by
/// owner.
/// NOTE: `optimize_filters()` should almost always be called before using this method because of
/// the strict match on `MemcmpEncodedBytes::Bytes`.
/// the requirement that `Memcmp::raw_bytes_as_ref().is_some()`.
fn get_spl_token_owner_filter(program_id: &Pubkey, filters: &[RpcFilterType]) -> Option<Pubkey> {
if !is_known_spl_token_id(program_id) {
return None;
Expand All @@ -2393,28 +2393,21 @@ fn get_spl_token_owner_filter(program_id: &Pubkey, filters: &[RpcFilterType]) ->
for filter in filters {
match filter {
RpcFilterType::DataSize(size) => data_size_filter = Some(*size),
#[allow(deprecated)]
RpcFilterType::Memcmp(Memcmp {
offset,
bytes: MemcmpEncodedBytes::Bytes(bytes),
..
}) if *offset == account_packed_len && *program_id == token_2022::id() => {
memcmp_filter = Some(bytes)
}
#[allow(deprecated)]
RpcFilterType::Memcmp(Memcmp {
offset,
bytes: MemcmpEncodedBytes::Bytes(bytes),
..
}) if *offset == SPL_TOKEN_ACCOUNT_OWNER_OFFSET => {
if bytes.len() == PUBKEY_BYTES {
owner_key = Pubkey::try_from(&bytes[..]).ok();
} else {
incorrect_owner_len = Some(bytes.len());
RpcFilterType::Memcmp(memcmp) => {
let offset = memcmp.offset();
if let Some(bytes) = memcmp.raw_bytes_as_ref() {
if offset == account_packed_len && *program_id == token_2022::id() {
memcmp_filter = Some(bytes);
} else if offset == SPL_TOKEN_ACCOUNT_OWNER_OFFSET {
if bytes.len() == PUBKEY_BYTES {
owner_key = Pubkey::try_from(bytes).ok();
} else {
incorrect_owner_len = Some(bytes.len());
}
}
}
}
RpcFilterType::TokenAccountState => token_account_state_filter = true,
_ => {}
}
}
if data_size_filter == Some(account_packed_len as u64)
Expand All @@ -2437,7 +2430,7 @@ fn get_spl_token_owner_filter(program_id: &Pubkey, filters: &[RpcFilterType]) ->
/// Analyze custom filters to determine if the result will be a subset of spl-token accounts by
/// mint.
/// NOTE: `optimize_filters()` should almost always be called before using this method because of
/// the strict match on `MemcmpEncodedBytes::Bytes`.
/// the requirement that `Memcmp::raw_bytes_as_ref().is_some()`.
fn get_spl_token_mint_filter(program_id: &Pubkey, filters: &[RpcFilterType]) -> Option<Pubkey> {
if !is_known_spl_token_id(program_id) {
return None;
Expand All @@ -2451,28 +2444,21 @@ fn get_spl_token_mint_filter(program_id: &Pubkey, filters: &[RpcFilterType]) ->
for filter in filters {
match filter {
RpcFilterType::DataSize(size) => data_size_filter = Some(*size),
#[allow(deprecated)]
RpcFilterType::Memcmp(Memcmp {
offset,
bytes: MemcmpEncodedBytes::Bytes(bytes),
..
}) if *offset == account_packed_len && *program_id == token_2022::id() => {
memcmp_filter = Some(bytes)
}
#[allow(deprecated)]
RpcFilterType::Memcmp(Memcmp {
offset,
bytes: MemcmpEncodedBytes::Bytes(bytes),
..
}) if *offset == SPL_TOKEN_ACCOUNT_MINT_OFFSET => {
if bytes.len() == PUBKEY_BYTES {
mint = Pubkey::try_from(&bytes[..]).ok();
} else {
incorrect_mint_len = Some(bytes.len());
RpcFilterType::Memcmp(memcmp) => {
let offset = memcmp.offset();
if let Some(bytes) = memcmp.raw_bytes_as_ref() {
if offset == account_packed_len && *program_id == token_2022::id() {
memcmp_filter = Some(bytes);
} else if offset == SPL_TOKEN_ACCOUNT_MINT_OFFSET {
if bytes.len() == PUBKEY_BYTES {
mint = Pubkey::try_from(bytes).ok();
} else {
incorrect_mint_len = Some(bytes.len());
}
}
}
}
RpcFilterType::TokenAccountState => token_account_state_filter = true,
_ => {}
}
}
if data_size_filter == Some(account_packed_len as u64)
Expand Down Expand Up @@ -4344,7 +4330,7 @@ pub mod tests {
JSON_RPC_SERVER_ERROR_TRANSACTION_HISTORY_NOT_AVAILABLE,
JSON_RPC_SERVER_ERROR_UNSUPPORTED_TRANSACTION_VERSION,
},
filter::{Memcmp, MemcmpEncodedBytes},
filter::MemcmpEncodedBytes,
},
solana_runtime::{
accounts_background_service::AbsRequestSender, bank::BankTestConfig,
Expand Down

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