Wormhole Update | The Substrate-to-Substrate Bridge Between Pangoro and Pangolin Testnet Deployed

Introduction to Substrate-to-Substrate Bridges

Token Protocols

1. Source and Target Chains

2. Native Assets vs. Mapped Assets

3. Relayer

4. CBA Model

High-Level Protocol Overview
  • Backing Module
  • Issuing Module

5. Interfaces

6. Cross-chain Protocols

7. Cross-chain Transfer of Assets

8. Cross-chain Redemption of Assets

9. Constraints on Messages

  • Must be Delivered
  • Must be verifiable

10. Cross-chain Fees

  • Who Pays
  • In What Tokens

Mapping Token Metadata Standards

Mapping Token Factory

Standards of Mapping Assets

Permission Management

Safety of Assets

How to Use Substrate-to-Substrate Bridge?

1. Create a Pangoro account(address) and apply for some test token ORING.

  • Download and install the polka{.js} plugin;
  • Click Polkadot Apps , select TEST NETWORKS, switch the network toPangoro, and check Accounts after the switching is complete.
  • Copy the Pangoro address and send it in an email to ran.ji@itering.com to apply for the test token ORING.

2. Create a Pangolin-Smart account and apply for the test token PRING.

  • Add a custom network in MetaMask, click Custom RPC.
  • Add Pangolin Test Network configuration parameters.
  • After the connection is successful, as shown in the figure below.
  • This address is the Pangolin-Smart address, which is usually referred to as DVM Address.
  • Apply for the test token PRING. For detailed operations, please refer to this document.

Pangoro → Pangolin-Smart

  1. Click the wormhole, turn on the testnet switch in the upper right corner, select Pangoro as the source chain, and select Pangolin-Smart as the target chain, click Connect To Pangoro ;

Pangolin-Smart → Pangoro

  1. Click the wormhole, select Pangolin-Smart as the source chain, and select Pangoro as the target chain, click Connect To Pangolin-Smart ;

What other Operations are Available by Using the Substrate-to-Substrate Bridge?

Version preview

  1. Important dependency updates and upgrades, including Substrate version and parity-bridge-common version;
  2. Substrate Pallet and contract security check;
  3. Template check of Mapping Token Factory and Mapping Token contract, as well as precompile quality check and cleanup related to interaction with EVM;
  4. Access test of Relayer Fee Market and test operation of Bridger client;
  5. Wormhole public testing and bug fixes.



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As an open cross-chain bridge protocol based on Substrate, Darwinia focuses on the construction of future Internet of Tokens. TG: http://t.me/DarwiniaNetwork