feat: Add redis caching for account factory address

[d4mr]

PR-Codex overview

This PR focuses on enhancing the generateSignedUserOperation function in userOperation.ts by introducing a caching mechanism to retrieve the Factory Contract Address more efficiently.

Detailed summary

• Added getAddress function
• Introduced caching for Factory Contract Address retrieval
• Improved error handling for missing Factory Contract Address

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[arcoraven]

This is indirect to what you want:

• if cachedFactoryAddress exists, set accountFactoryAddress to the checksum version of it
• else accountFactoryAddress is undefined or null

Write the code that way. The current way has some unexpected behavior (what does getAddress("") do? You have to read the code to find out):

  let accountFactoryAddress: Address | undefined;

  try {
    const cached = await redis.get(
      `account-factory:${accountAddress.toLowerCase()}`,
    );
    if (cached) {
      accountFactoryAddress = getAddress(cached);
    }
  } catch {}

[arcoraven]

Unless I'm missing something, shouldn't you just set the response directly to accountFactoryAddress instead of declaring a new var?

[arcoraven]

You're missing a line here to set the cache after retrieving it.

[github-actions]

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