feat(contract_manager): migrate from web3.js to viem

[devin-ai-integration]

Summary

This PR migrates the contract_manager package from web3.js to viem, replacing all Web3 dependencies with viem's modern TypeScript-first API. The migration includes:

• Core infrastructure: Updated EvmChain class to use viem's createPublicClient and createWalletClient
• Contract interactions: Refactored all EVM contract classes to use viem's getContract with typed read/write methods
• Transaction handling: Rewrote transaction estimation, sending, and receipt handling using viem patterns
• Scripts migration: Updated all 13 scripts to use viem APIs for contract interactions and event parsing
• Dependencies: Removed web3, web3-eth-contract, and @types/web3; retained viem ^2.23.5
• Version bump: Incremented from 1.0.1 to 1.1.0 for this significant API change

Rationale

This migration provides:

• Better TypeScript support: viem offers superior type safety and inference compared to web3.js
• Modern APIs: More intuitive functional approach vs web3's callback-heavy patterns
• Performance improvements: viem is generally faster and has smaller bundle sizes
• Consistency: Aligns with patterns already established in the price_pusher application

How has this been tested?

• Current tests cover my changes (TypeScript compilation successful)
• Added new tests
• Manually tested the code

Build verification:

• ✅ pnpm turbo build - All 21 tasks successful including contract_manager compilation
• ✅ pnpm run fix:lint - All linting errors resolved
• ✅ pre-commit run --all-files - Core TypeScript checks passed

Review Focus Areas

🔴 Critical - Transaction Logic

• Verify estiamteAndSendTransaction method signature changes don't break calling code
• Test deploy method works correctly with gas estimation and contract creation
• Validate gas price calculation produces reasonable values (especially the testnet 2x multiplier)

🟡 Important - Type Safety

• Review eslint-disable-next-line comments with as any casts in contract methods
• Ensure event parsing logic works correctly with new viem event structure
• Check that utility function replacements (keccak256, formatEther, etc.) are equivalent

🟡 Important - Script Compatibility

• Scripts now use different transaction sending patterns - verify they work with real networks
• Event handling changed from event.returnValues to event.args - confirm this works across all contract types
• Function encoding changed from encodeABI() to encodeFunctionData() - verify ABI compatibility

---

Link to Devin run: https://app.devin.ai/sessions/0ca65ffd62684f73ab3603e2d8fa75af
Requested by: Jayant ([email protected])

[devin-ai-integration]

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Project	Deployment	Preview	Comments	Updated (UTC)
proposals	Ready	Preview	Comment	Oct 3, 2025 11:36pm
staking	Ready	Preview	Comment	Oct 3, 2025 11:36pm

5 Skipped Deployments

Project	Deployment	Preview	Comments	Updated (UTC)
api-reference	Skipped			Oct 3, 2025 11:36pm
component-library	Skipped			Oct 3, 2025 11:36pm
developer-hub	Skipped			Oct 3, 2025 11:36pm
entropy-explorer	Skipped			Oct 3, 2025 11:36pm
insights	Skipped			Oct 3, 2025 11:36pm