Cross-Chain Proof Generation & NEAR Client Enhancements

[r-near]

This PR introduces support for generating and fetching cryptographic proofs across multiple chains, enhances NEAR client functionality, and adds Wormhole integration for cross-chain messaging.

Key Changes:

1. EVM Proof Generation

   • Added Merkle proof generation for EVM transactions using @ethereumjs/mpt
   • Supports pre/post-Shapella and post-Dencun transactions
   • New getEvmProof utility generates receipts, logs, and header proofs
   • Comprehensive test suite with snapshot verification

2. Wormhole Integration

   • Added VAA (Verified Action Approval) retrieval for cross-chain messages
   • Supports Mainnet/Testnet environments through Wormhole SDK

3. NEAR Client Improvements

   • Automatic detection of mainnet/testnet environments
   • Enhanced logMetadata with transaction polling and event parsing
   • Returns MPC signatures for NEAR operations
   • Added proper type definitions for metadata events

4. Core Enhancements

   • Network-specific RPC configuration for EVM chains (Eth/Base/Arb)
   • Added new dependencies: EthereumJS utilities, Wormhole SDK
   • Updated documentation with improved examples

Example Usage:

// Generate EVM proof for a transaction
const evmProof = await getEvmProof(txHash, ERC20_TRANSFER_TOPIC, ChainKind.Eth)

// Fetch Wormhole VAA
const vaa = await getVaa(txHash, "Mainnet")

// NEAR metadata logging with MPC signature
const { signature } = await nearClient.logMetadata("near:token.near")
const deployment = await ethClient.deployToken(signature, {
  token: "token.near",
  name: "My Token",
  symbol: "TKN",
  decimals: 18
})

Testing:

• Added snapshot tests for EVM proof generation
• Covered multiple transaction types and error cases
• Verified NEAR event parsing with transaction polling

Notes:

• NEAR logMetadata now returns structured event data instead of TX hash

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Latest commit: e64eb8b

The changes in this PR will be included in the next version bump.

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Name	Type
omni-bridge-sdk	Minor

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