fix(init): use Universal Sierra Compiler for contract declaration#406
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fix(init): use Universal Sierra Compiler for contract declaration#406
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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When declaring contracts on Starknet during
katana init, the compiled class hash computed by Katana's built-in Sierra-to-CASM compiler can differ from what Starknet validators compute. This happens when the contract was compiled with a different Cairo version than what Katana uses, causing declaration to fail with "Mismatch compiled class hash" errors.This PR integrates the Universal Sierra Compiler (USC) from Software Mansion for contract declaration. USC bundles all previously released Sierra compilers and automatically selects the appropriate one based on the Sierra version embedded in the contract, ensuring the CASM output matches what Starknet validators produce.
See https://github.com/software-mansion/universal-sierra-compiler for more details on how USC works.
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