upgrade_pool event does not include old WASM hash

[ritaifeoluwa]

Description

The Factory contract's upgrade_pool function does not emit an event with the old WASM hash. The event only includes the new hash, making it impossible to know what the pool was upgraded from.

Current behavior

env.events().publish(
    (symbol_short!("factory"), symbol_short!("pool_upg")),
    (pool_id, record.address, new_wasm_hash),
);

Expected behavior

Include the old hash:

let old_hash = env.deployer().get_wasm_hash(&record.address);
env.events().publish(
    (symbol_short!("factory"), symbol_short!("pool_upg")),
    (pool_id, record.address, old_hash, new_wasm_hash),
);

Why this matters

Off-chain indexers need both hashes for rollback scenarios and audit trails.

Labels

enhancement, factory, good first issue

[johnbiliyaminu-bit]

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[Bouynaty]

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[nanaabdul1172]

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[olalois]

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