From Silos to Interoperability: Building Interchain dApps on Polygon with Axelar

From Silos to Interoperability: Building Interchain dApps on Polygon with Axelar

- A brief history of blockchain
- Exploring the Axelar stack
- Token transfer mechanics
- General message passing and use-cases
- Demo

Transcript

1. From Silos to Interoperability: Building Interchain dApps on Polygon with Axelar
2. Idris Olubisi Developer Advocate, Axelar @olanetsoft
3. Workshop Agenda - A brief history of blockchain - Exploring the Axelar stack - Token transfer mechanics - General message passing and use-cases - Demo
4. The world has gone cross-chain The Beginning, 2009-2017 1 2 3
5. New platforms, 2017-2022 The world has gone cross-chain 2 1 3
6. Omnichain, 2023 - the future The world has gone cross-chain 3 1 2
7. Axelar securely connects all blockchain ecosystems https://axelarscan.io
8. The Axelar Stack
9. Axelar Tech Stack
10. Axelar- Send Tokens
11. Send Tokens Superpowers Deposit Addresses sendToken() Interchain Tokens
12. Token Transfer: Deposit Address A deposit address is a temporary special address created and monitored by Axelar's Relayer Services on behalf of the requester. const sdk = new AxelarAssetTransfer({ environment: "testnet" }); const depositAddress = await sdk.getDepositAddress({ fromChain, // source chain name toChain, // destination chain name destinationAddress, // destination chain address Asset // asset to transfer });
13. Token Transfer: sendToken() sendToken is a function in Axelar's gateway EVM contract that facilitates token transfers between EVM and Cosmos chains sendToken( "avalanche", // destination chain name "0xF16DfB26e1FEc993E085092563ECFAEaDa7eD7fD", // destination address "USDC", // asset symbol 100000000 // amount (in atomic units) )
14. Token Transfer: Interchain Tokens Interchain Tokens allow you to send tokens cross-chain, build your own asset bridges, build asset transfers into your interchain dApp and many more. How is this different? - Create a standardized ERC-20 token on multiple chains via the Interchain Portal - Build a custom token on every chain with built-in methods for sending - Upgrade an existing token by deploying a wrapper on every chain - Make Interchain Tokens executable alongside GMP messages for enhanced functionality.
16. Axelar - General Message Passing
17. Send Messages Superpowers callContractWithToken() callContract()
18. General Message Passing: callContract Axelar's General Message Passing (GMP) enables a developer building on one chain to call any function on any other connected chain. function callContract( string memory destinationChain, string memory contractAddress, bytes memory payload ) external; function _execute( string memory sourceChain, string memory sourceAddress, bytes calldata payload ) internal virtual {}
19. General Message Passing: callContractWithToken Axelar's General Message Passing (GMP) enables a developer building on one chain to call any function on any other connected chain. function callContractWithToken( string memory destinationChain, string memory contractAddress, bytes memory payload, string memory symbol, uint256 amount ) external; function _executeWithToken( string memory sourceChain, string memory sourceAddress, bytes calldata payload, string memory tokenSymbol, uint256 amount ) internal virtual {}
20. Live Use-Cases
23. DEMO ! bit.ly/polygon-interchain-workshop What are we doing? ➔ Clone a simple Next.js UI ➔ Write a smart contract ➔ Deploy the smart contract on Polygon ➔ Wire/connect the smart contract to the frontend ➔ Test the application
24. Axelar Examples github.com/axelarnetwork/axelar-examples
25. What Next ??? It’s Easy to Build Interchain-Native dApps For support, visit #developers on Axelar's Discord
26. Idris Olubisi idris@axelar.network bit.ly/olanetsoft-survey