echonet: add class fetcher resolving classes for OS runs from the feeder gateway#14715
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…der gateway The cende blob only carries the classes newly declared in its block, but the OS executes against every class the block touches. Resolve the rest from the mainnet feeder gateway with an on-PVC cache: Cairo 1 CASM by compiled_class_hash (zero-valued sentinel entries in initial_reads.compiled_class_hashes mark Cairo 0 classes), deprecated v0 classes by class_hash, and Sierra-shaped v0 responses skipped since the FGW's cairo-lang CASM serialization does not match the Rust schema. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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The cende blob only carries the classes newly declared in its block,
but the OS executes against every class the block touches. Resolve the
rest from the mainnet feeder gateway with an on-PVC cache: Cairo 1 CASM
by compiled_class_hash (zero-valued sentinel entries in
initial_reads.compiled_class_hashes mark Cairo 0 classes), deprecated
v0 classes by class_hash, and Sierra-shaped v0 responses skipped since
the FGW's cairo-lang CASM serialization does not match the Rust schema.
Co-Authored-By: Claude Fable 5 noreply@anthropic.com