feat: class import

[jbcaron]

Pull Request type

• Refactoring (no functional changes, no API changes)

What is the current behavior?

Resolves: #233

What is the new behavior?

• computation hash management: now based on Starknet version instead of block numbers
• database changes: removed the legacy JSON class from the database
• legacy class decompression: decompress the legacy class and create a blockifier class just-in-time for execution
• sierra class compilation: sierra class is now compiled using our custom type
• class fetch optimization: optimized class fetching through FGW

Does this introduce a breaking change?

Other information

[Trantorian1]

Seems good to me. Please check the below comments. It might also be a good idea to have someone like @cchudant check out this PR if you feel like you need a deeper look at the underlying logic of this part of the code, since I feel a bit rusty in this regard.

[cchudant]

finally, class hashes!! 🥳

[cchudant]

should we remove that code?

also i think we should move toward tdelabro's hash chain struct, it's pretty cool

[github-actions]

Coverage report

The coverage rate is 70.13647742873293%

57% of new lines are covered.

Diff Coverage details (click to unfold)

crates/client/rpc/src/test_utils.rs

100.0% of new lines are covered

crates/primitives/transactions/src/compute_hash.rs

100.0% of new lines are covered

crates/primitives/class/src/class_hash.rs

91.42857142857143% of new lines are covered

crates/primitives/class/src/class_update.rs

0.0% of new lines are covered

crates/client/block_import/src/pre_validate.rs

84.61538461538461% of new lines are covered

crates/primitives/state_update/src/lib.rs

0.0% of new lines are covered

crates/client/rpc/src/versions/v0_7_1/methods/read/get_class_at.rs

100.0% of new lines are covered

crates/primitives/block/src/lib.rs

25.0% of new lines are covered

crates/client/rpc/src/providers/mempool.rs

0.0% of new lines are covered

crates/primitives/class/src/into_starknet_core.rs

100.0% of new lines are covered

crates/client/rpc/src/versions/v0_7_1/methods/trace/simulate_transactions.rs

0.0% of new lines are covered

crates/primitives/transactions/src/broadcasted_to_blockifier.rs

0.0% of new lines are covered

crates/client/rpc/src/utils/transaction.rs

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crates/client/db/src/storage_updates.rs

100.0% of new lines are covered

crates/primitives/chain_config/src/chain_config.rs

100.0% of new lines are covered

crates/primitives/class/src/compile.rs

76.59574468085106% of new lines are covered

crates/client/sync/src/fetch/fetchers.rs

89.79591836734694% of new lines are covered

crates/client/rpc/src/versions/v0_7_1/methods/read/get_class.rs

100.0% of new lines are covered

crates/primitives/class/src/lib.rs

46.666666666666664% of new lines are covered

crates/client/rpc/src/versions/v0_7_1/methods/read/estimate_fee.rs

0.0% of new lines are covered

crates/primitives/chain_config/src/starknet_version.rs

56.0% of new lines are covered

crates/client/db/src/class_db.rs

70.73170731707317% of new lines are covered

crates/client/exec/src/blockifier_state_adapter.rs

0.0% of new lines are covered

crates/client/block_import/src/types.rs

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crates/primitives/transactions/src/from_broadcasted_transaction.rs

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crates/primitives/block/src/header.rs

100.0% of new lines are covered