✨ EIP-7702 Core Implementation (4b290f5)

• Full Dart implementation of EIP-7702 typed transactions (type 0x04).
• Support for constructing:
  • Unsigned7702Tx
  • Signed7702Tx
  • EIP-7702 authorization tuples.
• RLP encoding for:
  • EIP-1559 base fields
  • AccessLists (EIP-2930 compatible)
  • authorizationList (EIP-7702-specific)
• Signer Abstractions:
  • Signer.raw(Uint8List) for raw private keys.
  • Signer.eth(EthPrivateKey) for web3dart private keys.
• Automatic v/yParity normalization for ECDSA:
  • yParity stored as 0/1 for EIP-7702.
  • v normalized to 27/28 for compatibility with ecRecover.

🧰 Builder Layer (37b4746)

• AuthorizationBuilder
  • Builds unsigned authorization messages with resolved chain ID + nonce.
  • Produces signed authorization tuples.
  • buildAndSignIfNeeded automatically avoids redundant delegation.
• SetCodeTxBuilder
  • Builds full 0x04 typed transactions including: Nonce resolution, EIP-1559 gas estimation, AccessList, AuthorizationList
• Delegation Detection
  • Implements correct parsing of EIP-7702 delegation stubs:
    • Detects 0xef0100 || <impl> prefix.
    • Extracts delegated implementation address.

🚀 High-Level Client (53237ff)

• Eip7702Client provides simple entrypoints:
  • delegateAndCall → Builds + signs + broadcasts a 7702 transaction, performing delegation if needed.
  • revokeDelegation → Clears delegation using 7702 SetCode flow.

🔌 4337 Integration Helpers : canonicalizeUserOp for binding 7702 authorization with ERC-4337 user operations. (7234636)

docs: add comprehensive documentation (c5d0cfa)

test: add comprehensive test suite for EIP-7702 implementation (d369b3f)