Machina Bridge

USDC bridging between Arc, major EVM networks, and Solana, plus Arc Mainnet USDC Earn.

Overview

Machina Bridge is an independent community-built application centered on Arc.

The app now opens on Mainnet by default for users without a saved network preference. Testnet remains available from the network selector.

Current product surfaces include:

Arc ↔ Base USDC bridging
Arc ↔ Ethereum USDC bridging
Arc ↔ Optimism USDC bridging
Arc ↔ Arbitrum USDC bridging
Arc ↔ Solana USDC bridging
Arc Mainnet USDC Earn with Galaxy USDC and Gauntlet USDC Prime
Separate EVM Bridge and Solana Bridge views
Persistent transfer activity and recovery handling
Wallet-assisted EVM network switching
Solana refundable deposit tracking
A separate testnet environment for swap, bridge, Gateway, Solana, and development flows

Mainnet Gateway forwarding remains disabled.

Mainnet Routes

The following routes are enabled and marked verified in the application:

Feature	Route	Asset	Status
EVM Bridge	Arc ↔ Base	USDC	Verified
EVM Bridge	Arc ↔ Ethereum	USDC	Verified
EVM Bridge	Arc ↔ Optimism	USDC	Verified
EVM Bridge	Arc ↔ Arbitrum	USDC	Verified
Solana Bridge	Arc ↔ Solana	USDC	Verified

Mainnet routes use Circle CCTP and have been validated with small real-value transfers in both directions.

Testnet Routes

Testnet remains available for experimentation and development.

Feature	Route	Asset	Status
Swap	Ethereum Sepolia ETH ↔ USDC	ETH / USDC	Active
EVM Bridge	Ethereum Sepolia ↔ Arc Testnet	USDC	Active
EVM Bridge	Base Sepolia ↔ Arc Testnet	USDC	Active
EVM Bridge	Optimism Sepolia ↔ Arc Testnet	USDC	Active
EVM Bridge	Arbitrum Sepolia ↔ Arc Testnet	USDC	Active
Gateway Forwarding	Arc Testnet → Solana Devnet	USDC	Active
Solana Bridge	Solana Devnet → Arc Testnet	USDC	Active

Testnet assets have no real monetary value.

Bridge Experience

Current bridge functionality includes:

Route-aware USDC bridging across verified Arc mainnet routes
Circle/CCTP flows with wallet-controlled transaction signing
Separate EVM and Solana bridge interfaces
Live fee estimation before signing
Source and destination transaction links
Circle attestation tracking
Pending-transfer recovery
Ready-to-mint detection where applicable
Local and server-side activity persistence
Deduplication between local and server records
In Progress, Ready to Mint, and Completed activity states
Retry and recovery handling for common wallet and transaction edge cases

Arc Mainnet Earn

Earn offers Arc Mainnet USDC deposits and withdrawals through Circle Earn Kit. The current launch vaults are Galaxy USDC and Gauntlet USDC Prime, with Morpho-backed vault exposure where applicable.

Users review a quote before confirming each deposit or withdrawal in their own wallet. Machina fee: 0 USDC. Network and protocol costs may still apply.

Vaults are operated by third parties. Yields vary, and DeFi, smart contract, protocol, and market risks remain. Circle Guarded does not guarantee returns or protect principal.

Fees

Machina currently charges no service commission.

The interface shows:

Machina fee: 0 USDC
Circle or protocol fees where applicable
Network fees paid to the source or destination blockchain
Solana refundable deposits where applicable

A Machina fee of 0 USDC does not mean a transfer is free. Network and protocol costs may still apply.

Solana Refundable Deposits

For a Solana → Arc CCTP transfer, Circle creates a temporary Solana account for that transfer.

Solana requires SOL to fund that temporary account. This amount is separate from the permanent Solana transaction fee and is not paid to Machina.

Machina Bridge therefore shows:

the expected Phantom SOL debit
the refundable Circle deposit
network / priority fee information
open refundable deposits for the connected Phantom wallet
the remaining waiting period
a Return SOL action when the deposit becomes eligible

Circle's event-account window is currently 5 days. After that period, an eligible temporary account can be closed and its refundable SOL returned to the same Phantom wallet.

The refundable deposit panel is collapsed by default. The return flow is implemented; final post-window mainnet validation for the first launch deposits is still pending as of 2026-09-28.

Wallet Integrations

EVM

EVM wallet connections use Wagmi and RainbowKit.

Mainnet EVM networks:

Arc
Ethereum
Base
OP Mainnet
Arbitrum One

Testnet EVM networks:

Arc Testnet
Ethereum Sepolia
Base Sepolia
Optimism Sepolia
Arbitrum Sepolia

Solana

Phantom is used for Solana connection and signing.

Supported Solana environments:

Solana Mainnet
Solana Devnet

Sui

A Sui wallet connector is present in the testnet interface. There is currently no Sui bridge route exposed in the production mainnet bridge flow.

Arc Mainnet

Parameter	Value
Chain ID	`5042`
RPC	`https://rpc.mainnet.arc.io`
Gas asset	USDC
Native USDC	`0x3600000000000000000000000000000000000000`
CCTP Domain	`26`
TokenMessenger	`0x28b5a0e9C621a5BadaA536219b3a228C8168cf5d`
MessageTransmitter	`0x81D40F21F12A8F0E3252Bccb954D722d4c464B64`
Explorer	`https://explorer.arc.io`
Official docs	`https://docs.arc.network/`

Solana Mainnet

Parameter	Value
CCTP Domain	`5`
USDC Mint	`EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v`
MessageTransmitterV2	`CCTPV2Sm4AdWt5296sk4P66VBZ7bEhcARwFaaS9YPbeC`
TokenMessengerMinterV2	`CCTPV2vPZJS2u2BBsUoscuikbYjnpFmbFsvVuJdgUMQe`
Explorer	`https://solscan.io`

Mainnet USDC Addresses

Network	USDC
Arc	`0x3600000000000000000000000000000000000000`
Ethereum	`0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48`
Base	`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`
OP Mainnet	`0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85`
Arbitrum One	`0xaf88d065e77c8cC2239327C5EDb3A432268e5831`
Solana	`EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v`

Arc Testnet

Parameter	Value
Chain ID	`5042002`
Default RPC	`https://rpc.testnet.arc.io`
Gas asset	USDC
Explorer	`https://testnet.arcscan.app`
Faucet	`https://faucet.circle.com`

Technology

Machina Bridge uses:

React
TypeScript
Vite
Wagmi
Viem
RainbowKit
Ethers
Circle Bridge Kit
Circle Earn Kit
Morpho vault data
Circle Solana adapter
Solana Web3.js
Mysten dApp Kit
Vercel serverless APIs

Project Structure

Machina-Bridge/
├── api/
├── public/
│   ├── .well-known/
│   │   └── security.txt
│   ├── robots.txt
│   └── sitemap.xml
├── scripts/
├── src/
│   ├── components/
│   ├── config/
│   ├── hooks/
│   ├── lib/
│   ├── App.tsx
│   └── main.tsx
├── README.md
├── package.json
├── vercel.json
└── vite.config.ts

Quick Start

Requirements

Node.js 18+
npm
An EVM wallet such as MetaMask or Rabby
Phantom for Solana flows
Native gas assets and USDC for the networks being used

Clone and install

git clone https://github.com/dharmanan/Machina-Bridge.git
cd Machina-Bridge
npm install

Run locally

npm run dev

The Vite development server runs on http://localhost:3000.

Production build

npm run build

Environment

The application includes public RPC fallbacks and accepts environment overrides where configured.

Common browser-side variables include:

VITE_WALLETCONNECT_PROJECT_ID
VITE_CIRCLE_APP_ID

VITE_ARC_MAINNET_RPC
VITE_ARC_MAINNET_EXPLORER
VITE_ETHEREUM_MAINNET_RPC
VITE_BASE_MAINNET_RPC
VITE_OPTIMISM_MAINNET_RPC
VITE_ARBITRUM_MAINNET_RPC
VITE_SOLANA_MAINNET_RPC

VITE_SEPOLIA_RPC
VITE_ARC_TESTNET_RPC
VITE_BASE_SEPOLIA_RPC
VITE_OPTIMISM_SEPOLIA_RPC
VITE_ARBITRUM_SEPOLIA_RPC
VITE_SOLANA_DEVNET_RPC

Do not place private keys, wallet seed phrases, or backend secrets in VITE_* variables. Vite environment variables are exposed to the browser bundle.

Validation

Useful checks:

npm audit
npm audit --omit=dev
npm run build
npm run verify:mainnet-cctp
npm run verify:mainnet-solana-cctp
npm run verify:mainnet-solana-bridgekit

Security

The application never requires wallet seed phrases or private keys.

Mainnet routes move real assets. Always verify:

source and destination networks
amount
recipient wallet
wallet transaction details
protocol and network fees

The production deployment includes security headers and a public security.txt file:

https://machinabridge.vercel.app/.well-known/security.txt

Disclaimer

Machina Bridge is an independent community-built project and is not an official Arc or Circle product.

Verified mainnet bridge routes transfer real USDC. Blockchain transactions are irreversible, and network or protocol fees may apply.

Machina currently charges no service commission.

Links

Live app: https://machinabridge.vercel.app
Repository: https://github.com/dharmanan/Machina-Bridge
X: https://x.com/KohenEric
Arc docs: https://docs.arc.network/
Arc Explorer: https://explorer.arc.io
Solscan: https://solscan.io

License

MIT

Name		Name	Last commit message	Last commit date
api		api
public		public
scripts		scripts
src		src
.env.example		.env.example
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
eslint.config.js		eslint.config.js
index.html		index.html
package-lock.json		package-lock.json
package.json		package.json
postcss.config.js		postcss.config.js
tailwind.config.js		tailwind.config.js
tsconfig.json		tsconfig.json
tsconfig.node.json		tsconfig.node.json
vercel.json		vercel.json
vite.config.ts		vite.config.ts

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Machina Bridge

Overview

Mainnet Routes

Testnet Routes

Bridge Experience

Arc Mainnet Earn

Fees

Solana Refundable Deposits

Wallet Integrations

EVM

Solana

Sui

Arc Mainnet

Solana Mainnet

Mainnet USDC Addresses

Arc Testnet

Technology

Project Structure

Quick Start

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Run locally

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Machina Bridge

Overview

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Solana Refundable Deposits

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Solana

Sui

Arc Mainnet

Solana Mainnet

Mainnet USDC Addresses

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Project Structure

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Run locally

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