fix(init): use Blake2s compiled class hash on Starknet >= 0.14.1

[kariy]

Summary

Starknet v0.14.1 switched the canonical compiled class hash from Poseidon to Blake2s, and declares using the old hash are rejected (per the release notes):

Declare transactions will now expect compiled_class_hash to be computed with the new hash function, and will be rejected otherwise.

katana init rollup against a 0.14.1+ settlement chain (mainnet, and Sepolia post-upgrade) therefore fails — the Piltover Appchain declare submits Appchain::CASM_HASH, a Poseidon hash baked in at compile time by the contract! macro.

Approach

The declare path now reads the settlement chain's protocol version from the latest block's starknet_version and picks the matching hash:

• >= 0.14.1 — compile Sierra → CASM and hash with Blake2s via starknet_api's HashableCompiledClass (already a transitive dep through blockifier).
• otherwise — use the existing precomputed Poseidon Appchain::CASM_HASH constant.

🤖 Generated with Claude Code

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.30.

Benchmark suite	Current: bbede2c	Previous: c8d76b6	Ratio
GenericContractInfo/compress	144 ns/iter (± 2)	109 ns/iter (± 8)	1.32
FinalityStatus/compress	1 ns/iter (± 0)	0 ns/iter (± 0)	+∞
TypedTransactionExecutionInfo/compress	18018 ns/iter (± 117)	10669 ns/iter (± 37)	1.69
VersionedContractClass/compress	372 ns/iter (± 4)	284 ns/iter (± 3)	1.31
ContractInfoChangeList/compress	1687 ns/iter (± 58)	1161 ns/iter (± 25)	1.45
BlockChangeList/compress	723 ns/iter (± 17)	509 ns/iter (± 101)	1.42
ReceiptEnvelope/compress	27449 ns/iter (± 280)	20236 ns/iter (± 1207)	1.36
TrieDatabaseValue/compress	167 ns/iter (± 1)	123 ns/iter (± 3)	1.36
TrieHistoryEntry/compress	312 ns/iter (± 1)	222 ns/iter (± 1)	1.41

This comment was automatically generated by workflow using github-action-benchmark.

CC: @kariy

[github-actions]

Codec benchmark diff vs main

Benchmark	Baseline (ns)	Current (ns)	Δ
CompiledClass(fixture)/compress	2070455	2675132	+29.21%
CompiledClass(fixture)/decompress	2272571	2912113	+28.14%
ExecutionCheckpoint/compress	27	32	+18.52%
ExecutionCheckpoint/decompress	20	25	+25.00%
PruningCheckpoint/compress	27	32	+18.52%
PruningCheckpoint/decompress	20	26	+30.00%
VersionedHeader/compress	523	644	+23.14%
VersionedHeader/decompress	704	814	+15.63%
StoredBlockBodyIndices/compress	63	78	+23.81%
StoredBlockBodyIndices/decompress	31	36	+16.13%
StorageEntry/compress	124	154	+24.19%
StorageEntry/decompress	123	148	+20.33%
ContractNonceChange/compress	124	149	+20.16%
ContractNonceChange/decompress	204	238	+16.67%
ContractClassChange/compress	175	218	+24.57%
ContractClassChange/decompress	215	249	+15.81%
ContractStorageEntry/compress	135	159	+17.78%
ContractStorageEntry/decompress	271	314	+15.87%
GenericContractInfo/compress	109	144	+32.11%
GenericContractInfo/decompress	91	106	+16.48%
Felt/compress	71	81	+14.08%
Felt/decompress	49	57	+16.33%
BlockHash/compress	70	81	+15.71%
BlockHash/decompress	49	56	+14.29%
TxHash/compress	70	81	+15.71%
TxHash/decompress	49	57	+16.33%
ClassHash/compress	69	81	+17.39%
ClassHash/decompress	50	56	+12.00%
CompiledClassHash/compress	69	81	+17.39%
CompiledClassHash/decompress	50	56	+12.00%
BlockNumber/compress	39	47	+20.51%
BlockNumber/decompress	20	26	+30.00%
TxNumber/compress	39	47	+20.51%
TxNumber/decompress	20	25	+25.00%
FinalityStatus/compress	0	1	+Infinity%
FinalityStatus/decompress	10	12	+20.00%
TypedTransactionExecutionInfo/compress	10669	18018	+68.88%
TypedTransactionExecutionInfo/decompress	2872	3495	+21.69%
VersionedContractClass/compress	284	372	+30.99%
VersionedContractClass/decompress	677	776	+14.62%
MigratedCompiledClassHash/compress	124	149	+20.16%
MigratedCompiledClassHash/decompress	123	147	+19.51%
ContractInfoChangeList/compress	1161	1687	+45.31%
ContractInfoChangeList/decompress	1787	2262	+26.58%
BlockChangeList/compress	509	723	+42.04%
BlockChangeList/decompress	731	889	+21.61%
ReceiptEnvelope/compress	20236	27449	+35.64%
ReceiptEnvelope/decompress	5084	5969	+17.41%
TrieDatabaseValue/compress	123	167	+35.77%
TrieDatabaseValue/decompress	201	218	+8.46%
TrieHistoryEntry/compress	222	312	+40.54%
TrieHistoryEntry/decompress	226	252	+11.50%

[github-actions]

Runner: AMD EPYC 7763 64-Core Processor (4 cores) · 15Gi RAM

[codecov]

Codecov Report

❌ Patch coverage is 0% with 27 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.24%. Comparing base (9bde0ae) to head (bbede2c).
⚠️ Report is 414 commits behind head on main.

Files with missing lines	Patch %	Lines
bin/katana/src/cli/init/deployment.rs	0.00%	22 Missing ⚠️
crates/primitives/src/class.rs	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #570      +/-   ##
==========================================
- Coverage   73.32%   68.24%   -5.08%     
==========================================
  Files         209      320     +111     
  Lines       23132    44798   +21666     
==========================================
+ Hits        16961    30573   +13612     
- Misses       6171    14225    +8054     

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