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fix(oracle): preallocate price account serialization

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Use borsh::object_length to reserve the exact serialized size for OraclePriceAccount data without relying on size_of_val.

Add coverage for string-backed source identifiers.
This commit is contained in:
Ricardo Guilherme Schmidt 2026-05-14 01:59:11 -03:00
parent 56dbf251d3
commit bf7c6593ae
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GPG Key ID: 1396EA17DE132FFE
1 changed files with 16 additions and 1 deletions
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17
oracle/core/src/lib.rs
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@ -173,7 +173,9 @@ impl TryFrom<&Data> for OraclePriceAccount {
impl From<&OraclePriceAccount> for Data {
fn from(price_account: &OraclePriceAccount) -> Self {
let mut data = Vec::new();
let serialized_len =
borsh::object_length(price_account).expect("Oracle price account length must be known");
let mut data = Vec::with_capacity(serialized_len);
BorshSerialize::serialize(price_account, &mut data)
.expect("Serialization to Vec should not fail");
Self::try_from(data).expect("Oracle price account encoded data should fit into Data")
@ -292,6 +294,19 @@ mod tests {
);
}
#[test]
fn oracle_price_account_data_matches_borsh_object_length() {
let mut oracle_account = price_account(1_050_000, 1_000);
oracle_account.source_identifier = "mock-oracle-with-long-source-name".to_owned();
let data = Data::from(&oracle_account);
assert_eq!(
data.as_ref().len(),
borsh::object_length(&oracle_account).expect("object length should be known")
);
}
#[test]
fn account_price_feed_rejects_wrong_feed_account() {
let oracle_account = price_account(1_050_000, 1_000);