Open Protocol Indexer, OPI, is the best-in-slot open-source indexing client for meta-protocols on Bitcoin.

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Awesome List / Resources for Account Abstraction

Awesome Repo for Passkeys and WebAuthn for Web3

P256 signature verification solidity contract

📖 A curated list of resources dedicated to Account Abstraction (EIP-4337)

solidity-by-example 教程中文翻译｜@Web3-Club

Construct merkle trees with MerkleTree.js and verify merkle proofs in Solidity.