Non Custodian Multi-Chain Smart Wallet

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  Onboarding Smart Contract Wallet with passkey

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  Multi-Chain Wallet

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  Mumbai and Fuji Wallet

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  How it work

Inspiration

Pain points

1. Users hard to secure their private key and seed phrase.
2. Web2 user doesn’t quite understand gas fees and how to manage it.
3. Web2 users hard to manage assets between networks

What it does

-Smart Wallet by Account Abstraction(ERC-4337)
-Easily Onboard by Passkey; We use the passkey to authenticate and onboarding new users, it is very secure and seamless, then the users do not need passwords or private key anymore
-Gasless; Users do not need to understand and manage their gas anymore. We have a paymaster to pay gas for users or users
-Multi Chain supported; We use Chain Link CCIP to manage multi-chain assets

How we built it

-Web Application by NextJS, Ethers JS, user operation to bundler and integrated with ChainLink: Data feed to get the crypto price, CCIP to transfer assets between chains in the wallet
-Bundler for sending user operation to EntryPoint Contract on Chain
-Smart Contract: Smart Account Wallet, Factory for Account Wallet, Price Feed and TokenTransferor(CCIP)

How It works

Challenges we ran into

-Integration between ChainLink Services and smart contract wallet

Accomplishments that we're proud of

-We Can integrate with ChainLink Services

What we learned

-Learn How to integrate with ChainLink Services; data feed and CCIP

What's Next for Non-Custodian Multi-Chain Smart Wallet

-Build a Mobile Application -Integrate with more DeFi Protocols -Go live

Pitchdeck

link

CCIP Transaction (Transfer CCIP-BnM router from Mumbai to Fuji) https://ccip.chain.link/msg/0xb6dd9dcca4d891f7ffc8ee52eb9aa9fddc88dbaa05c922a8259d69b48569c234

TokenTransferor Contract https://mumbai.polygonscan.com/address/0x19F2b3e2a630F7F2CC0E64dE96CfCBDd45ca51Fa https://testnet.snowtrace.io/address/0x6E78c61C600Ba9559Bc9eE3469848421606EC7Fc

User Operation Transaction https://mumbai.polygonscan.com/tx/0xd8cef4a95f6289baa145d117500ee61797a3f963eb7a7e5c7682785c50f21f9f

Price Feed Oracle Contracts https://mumbai.polygonscan.com/address/0xEA0128f5339014D7a82d50444b902b10F3E00992 https://testnet.snowtrace.io/address/0xEA0128f5339014D7a82d50444b902b10F3E00992

Smart Contract Wallet https://mumbai.polygonscan.com/address/0x1D45D389E38Fd1b7c5D1BE163aA3baa4466d279b

Factory Contract https://mumbai.polygonscan.com/address/0xdB739d9603A1008eBD070db917931bda83717bC5 https://testnet.snowtrace.io/address/0xdB739d9603A1008eBD070db917931bda83717bC5

Built With

• ethers
• javascript
• nextjs
• node.js
• solidity
• typescript