Add support for ext_trie_blake2_256_verify_proof host functions#2221
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Add support for ext_trie_blake2_256_verify_proof host functions#2221x3c41a wants to merge 1 commit intosmol-dot:mainfrom
x3c41a wants to merge 1 commit intosmol-dot:mainfrom
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Implement ext_trie_blake2_256_verify_proof_version_1 and _version_2 which were previously stubbed with host_fn_not_implemented!(). These host functions are needed by runtimes that perform Merkle proof verification, such as Polkadot Bulletin Chain's pallet-transaction-storage. The implementation uses smoldot's existing proof_decode module to decode and verify the proof, then looks up the key and compares against the expected value. For state version V1 (version_2 only), hashed storage values (>= 33 bytes) are handled by comparing blake2b hashes.
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tomaka
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| - Add support for the `ext_trie_blake2_256_verify_proof_version_1` and `ext_trie_blake2_256_verify_proof_version_2` host functions. These are used by runtimes that perform Merkle proof verification (e.g. Polkadot Bulletin Chain's `pallet-transaction-storage`). |
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| - Add support for the `ext_trie_blake2_256_verify_proof_version_1` and `ext_trie_blake2_256_verify_proof_version_2` host functions. These are used by runtimes that perform Merkle proof verification (e.g. Polkadot Bulletin Chain's `pallet-transaction-storage`). | |
| - Add support for the `ext_trie_blake2_256_verify_proof_version_1` and `ext_trie_blake2_256_verify_proof_version_2` host functions. ([#2221](https://github.com/smol-dot/smoldot/pull/2221)) |
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Summary
Implemented
ext_trie_blake2_256_verify_proof_version_1and_version_2host functionsUses the existing
proof_decodemodule to decode and verify the Merkle proof, look up the key, and compare against the expected value. Handles state version V1 where values >= 33 bytes are stored as blake2b hashes.Motivation
Chopsticks uses smoldot for WASM execution and fails on runtimes that call these host functions (e.g. Polkadot Bulletin Chain's
pallet-transaction-storage).Reference issue - paritytech/polkadot-bulletin-chain#341