Smart Contracts

ERC-20 Token PORTR

It is a standard ERC-20 smart contract with a few additions, namely:

• open mint() with a fixed price, which is maintained by Chainlink.
  • the smart contract on Taiko Mainnet is using Pyth data feed through the Chainlink interface
  • it allows for minting by sending the native token as the payable, the rate of which is set by the Chainlink price feed
• adminMint() is only called by the owner to mint without having to pay
  • this is used for internal usage and enterprise-onboarding
• applyToAccount() used for adding balance to a tenant
  • initiates a burn and emits an event, which is used to increase the account balance within the gateway
• sweep() and sweepToken()
  • allows the operator to withdraw token balances of the contract, both native and ERC-20, or settling internal accounts
  • this enables coverage of POKT relay costs
  • it completes the lifecycle of the smart contract

Pyth Integration

The Taiko deployment of the smart contract has a dependency of the Pyth wrapper for Chainlink. It has been deployed by us, but the code-base is not maintained by PORTERS. The wrapper is then connected to our implementation as the price feed for minting.

A script (opens in a new tab) for deploying this wrapper exists and has to be modified for deploying any other price feed (currently ETH/USD).

Smart Contract Deployments

• Taiko (opens in a new tab)
• Optimism (opens in a new tab)
• Base (opens in a new tab)
• Gnosis Chain (opens in a new tab)