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Accept both legacy hex strings and current raw bytes in binary Serde formats with matching string and byte-buffer layouts, including bincode. Keep current serialization and native bincode codecs unchanged. Cover the old format with a frozen fixture from 40268cc, malformed input, length limits, alternate bincode configuration and nested values. <sub>🤖 Co-authored by [Claudius the Magnificent](https://github.com/lklimek/claudius) AI Agent</sub> Co-Authored-By: Codex GPT-6 <noreply@openai.com>
Preserve string callbacks and the byte-buffer deserializer hint supported by the existing byte type. Cover binary deserializers delivering hex text. <sub>🤖 Co-authored by [Claudius the Magnificent](https://github.com/lklimek/claudius) AI Agent</sub> Co-Authored-By: Codex GPT-6 <noreply@openai.com>
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 52.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 25 functions across 3 files. (3 skipped: 3 unsupported.)
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## dev #1145 +/- ##
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- Coverage 78.19% 78.05% -0.15%
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Files 302 302
Lines 79257 79257
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- Hits 61978 61862 -116
- Misses 17279 17395 +116
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Review comments at @crypto/src/bls/public_key_bytes.rs:
- Line 132: Update the deserializer call in the public-key byte decoding
implementation to use deserialize_bytes instead of deserialize_byte_buf,
allowing borrowed decoding to pass the input slice without allocating based on
the declared length.
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CHANGELOG.mdcrypto/Cargo.tomlcrypto/src/bls.rscrypto/src/bls/public_key_bytes.rscrypto/tests/data/legacy-serde/README.mdcrypto/tests/legacy_bls_serde.rs
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| deserializer.deserialize_byte_buf(Visitor) |
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🩺 Stability & Availability | 🟠 Major | ⚡ Quick win
Request borrowed bytes instead of an owned byte buffer.
If a caller decodes an untrusted key with bincode::serde::borrow_decode_from_slice and the standard configuration, deserialize_byte_buf allocates a Vec<u8> from the declared length before visit_bytes can reject it. A short input with a very large length prefix can therefore exhaust memory before deserialization returns an error. Use deserialize_bytes(Visitor) here. The borrowed bincode decoder can then pass a slice without allocating; owned decoding still needs an appropriate limit at its input boundary. (docs.rs)
Proposed change
--- "a/crypto/src/bls/public_key_bytes.rs"
+++ "b/crypto/src/bls/public_key_bytes.rs"
@@ -129,6 +129,6 @@
}
}
- deserializer.deserialize_byte_buf(Visitor)
+ deserializer.deserialize_bytes(Visitor)
}
}📝 Committable suggestion
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| deserializer.deserialize_byte_buf(Visitor) | |
| deserializer.deserialize_bytes(Visitor) |
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Review comment at @crypto/src/bls/public_key_bytes.rs at line 132:
Update the deserializer call in the public-key byte decoding implementation to
use deserialize_bytes instead of deserialize_byte_buf, allowing borrowed
decoding to pass the input slice without allocating based on the declared
length.
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I am bringing back old format, the binary encoding of data wasnt an intended change |
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TL;DR: Restore reading previously saved BLS public keys after upgrading rust-dashcore.
User story
As a wallet developer, I want to read public keys saved by earlier versions so that an upgrade does not make those keys unreadable.
Scenario
Base flow
An application saves a public key, upgrades the library, and loads the saved value.
Actual behavior
Loading the older value fails because the new reader expects a different representation.
Expected behavior
Both older and current values load successfully, while newly saved values retain the current format.
Detailed discussion
What was done
BlsPkBytes(also exposed asBLSPublicKey) a binary Serde visitor accepting either 48 raw bytes or 96 ASCII hex digits. Bincode's compatible string/byte-buffer layouts make this automatic.Encode/Decode.40268cc0402a8933ec539f16b2d634c4e25876ad, malformed/truncated input, decoder limits, nested values and alternate bincode configuration.This PR covers BLS public keys only. PlatformNodeId byte order and transaction-record/database migration are deferred; this does not claim complete compatibility for every historical record. New binary values remain unreadable by older readers that only accept hex.
Testing
Passed locally (Cargo test/Clippy commands run through the repository's cached wrapper):
cargo test -p dashcore-crypto --all-features --locked --offline: 14 unit tests, 8 regression tests and 2 doctests.cargo test -p dashcore --all-features --lib serde --locked --offline: 17 tests.cargo clippy -p dashcore-crypto --all-features --all-targets --locked --offline -- -D warnings.cargo clippy -p dashcore-crypto --no-default-features --features serde --lib --locked --offline -- -D warnings.cargo fmt --all -- --checkandgit diff --check.The full workspace suite and release-profile Clippy were not run.
Prior work
dashcore-cryptocrate, switch todash-pkcfromblsfulfork #1036 introduced the BLS representation change addressed here.🤖 Co-authored by Claudius the Magnificent AI Agent
PR Hygiene ·
40e7b24CHANGELOG.md,crypto/Cargo.toml,crypto/src/bls.rsand 4 more) — QuantumExplorer or ZocoLini or xdustinfaceWhen every merge requirement is met, the
PR Hygienecheck passes. Reviewer limits do not block merging; other required GitHub checks and protections still apply.Summary by CodeRabbit