feat: NEAR Protocol Intents

[serrrfirat]

Background

This PR implements cross-chain token swapping functionality using the NEAR Intents, allowing users to swap tokens between NEAR and other supported chains.

What does this PR do?

• Implements cross-chain token swapping functionality
• Adds token configuration management
• Implements deposit and withdrawal functionality
• Adds support for multiple chains and tokens
• Implements intent message signing and publishing

Current limitations: This PR only allows deposits from NEAR into the NEAR Intents protocol but allows for swapping and withdrawing to any supported chain.

What kind of change is this?

Features: Cross-chain Swap Bug fixes: Fixes the NEAR swap Ref.finance problems

Risks

• High: With the withdraw_cross_chain_swap_near function called, the resulting swap can be moved to an address provided to the agent.
• Medium: Transaction failures during cross-chain operations
• Medium: Price slippage during swaps
• Low: Token configuration updates needed for new assets
• Low: Storage balance requirements for new users

Why are we doing this? Any context or related work?

Near Protocol introduced Near Intents which allows for cross-chain swaps between supported chains. This tool is great for eliza agents since they have wallets on many different protocols. They can leverage this change in the plugin to swap their assets in different chains.

Documentation changes needed?

Updated README.md already with necessary changes.

Where should a reviewer start?

Start up eliza with near-plugin enabled and .env properties provided, ask it to swap the asset that you have on NEAR to swap with an asset on another chain ("swap it to USDC on Base") with an address (0x).

If you are stuck and things are not moving, go to the website https://app.near-intents.org/ and see if you are missing required assets.

[wtfsayo]

@coderabbitai review

[coderabbitai[bot]]

📝 Walkthrough

Walkthrough

The pull request introduces comprehensive cross-chain functionality for the NEAR Protocol plugin, expanding its capabilities to support token swaps, deposits, and withdrawals across multiple blockchain networks. The changes include new actions, type definitions, utility functions, and configuration files that enable seamless cross-chain operations using Near Intents, with enhanced support for unified tokens and cross-chain transaction management.

Changes

File	Change Summary
README.md	Added cross-chain functionality descriptions, new usage examples, and updated API references for cross-chain swap actions
package.json	Added dependencies like viem, borsh, zod to support cross-chain operations
src/actions/crossChainSwap.ts	New module for handling cross-chain swaps, including RPC requests, quote management, and swap/withdrawal logic
src/config/tokens.json	New token configuration defining unified and single-chain tokens across multiple networks
src/index.ts	Added executeCrossChainSwap and executeCrossChainSwapAndWithdraw actions
src/types/*	New type definitions for intents, tokens, deposits, supporting cross-chain functionality
tsconfig.json	Updated compiler options to enable decorators and JSON module imports

Finishing Touches

• [ ] 📝 Generate Docstrings (Beta)

---

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[odilitime]

Hello,

We are changing our plugin development strategy to be more scalable. We have moved the plugins out into their own repos and we're looking for people to either maintain those or own them on their own Github.

Please make your code changes to this repo: https://github.com/elizaos-plugins/plugin-near

If you'd like to be a maintainer, file an issue in the plugin repo and join our Discord https://discord.gg/elizaos to coordinate.

If you'd like to control the plugin on your own Github, please add an issue to the plugin repo pointing to your repo, and add a modification to the registry. Submit a PR to edit the registry here: https://github.com/elizaos-plugins/registry

Closing this PR for now. Let us know if you have any questions