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Fix broken Optimism contract link in custom token bridging tutorial #1635

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May 30, 2025
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Fix broken Optimism contract link in custom token bridging tutorial #1635

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4 changes: 2 additions & 2 deletions pages/app-developers/tutorials/bridging/standard-bridge-custom-token.mdx
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Expand Up @@ -23,7 +23,7 @@ import { WipCallout } from '@/components/WipCallout'
In this tutorial, you'll learn how to bridge a custom ERC-20 token from Ethereum to an OP Stack chain using the Standard Bridge system.
This tutorial is meant for developers who already have an existing ERC-20 token on Ethereum and want to create a bridged representation of that token on OP Mainnet.

This tutorial explains how you can create a custom token that conforms to the [`IOptimismMintableERC20`](https://github.com/ethereum-optimism/optimism/blob/v1.12.2/packages/contracts-bedrock/src/universal/IOptimismMintableERC20.sol) interface so that it can be used with the Standard Bridge system.
This tutorial explains how you can create a custom token that conforms to the [`IOptimismMintableERC20`](https://github.com/ethereum-optimism/optimism/blob/develop/packages/contracts-bedrock/src/universal/OptimismMintableERC20Factory.sol) interface so that it can be used with the Standard Bridge system.
A custom token allows you to do things like trigger extra logic whenever a token is deposited.
If you don't need extra functionality like this, consider following the tutorial on [Bridging Your Standard ERC-20 Token Using the Standard Bridge](./standard-bridge-standard-token) instead.

Expand All @@ -33,7 +33,7 @@ If you don't need extra functionality like this, consider following the tutorial

## About OptimismMintableERC20s

The Standard Bridge system requires that L2 representations of L1 tokens implement the [`IOptimismMintableERC20`](https://github.com/ethereum-optimism/optimism/blob/v1.12.2/packages/contracts-bedrock/src/universal/IOptimismMintableERC20.sol) interface.
The Standard Bridge system requires that L2 representations of L1 tokens implement the [`IOptimismMintableERC20`](https://github.com/ethereum-optimism/optimism/blob/develop/packages/contracts-bedrock/src/universal/OptimismMintableERC20Factory.sol) interface.
This interface is a superset of the standard ERC-20 interface and includes functions that allow the bridge to properly verify deposits/withdrawals and mint/burn tokens as needed.
Your L2 token contract must implement this interface in order to be bridged using the Standard Bridge system.
This tutorial will show you how to create a custom token that implements this interface.
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