💡 Aggregators play a crucial role in handling diverse signature schemes used by different smart contract wallets.

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Why Aggregators are Important

  1. Signature Scheme Diversity: Different smart contract wallets use various signature schemes.
  2. Efficient Validation: Aggregating UserOperations with the same scheme allows for separate, more efficient validations.
  3. Gas Optimization: On-chain cryptographic arithmetic can be gas-intensive. Signature schemes supporting aggregation can significantly reduce gas costs during on-chain validation.

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Key Functions of Aggregators

Aggregators primarily use two essential functions:

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1. aggregateSignatures

  • Input: An array of UserOperations
  • Output: An aggregated signature using a specific scheme
  • Purpose: Combines multiple signatures into a single, compact representation

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2. validateSignatures

  • Input:
    • An array of UserOperations
    • The aggregated signatures
  • Purpose: Verifies the validity of the aggregated signatures against the provided UserOperations

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Benefits of Aggregation

  1. Gas Efficiency: Reduces the overall gas cost for validating multiple transactions
  2. Scalability: Enables processing of more transactions within the same gas limits
  3. Flexibility: Accommodates different signature schemes used by various smart contract wallets