Toss, Optimism trial won-linked stablecoin on OP Stack

Optimism provides the blockchain infrastructure through its OP Stack technology. OP Stack is a modular framework that supports dedicated application-specific chains while relying on Ethereum for security and settlement. Layer 2 networks process transactions separately from Ethereum before finalising them on the main chain, reducing costs and improving transaction speeds.

According to Toss, the companies will examine whether OP Stack can support a blockchain-based financial network tailored for Korean digital payment services instead of relying on shared public infrastructure. Optimism's technology is already used by more than 30 blockchain networks, including projects developed by Sony, World Chain, Uniswap, OKX Layer, and Kraken. The company also offers institutional deployments designed to satisfy regulatory and security requirements, with regulated financial firms such as Europe's Bitpanda already adopting the technology.

Toss, which serves around 30 million users and supports more than 500,000 online and offline merchants, plans to gradually expand blockchain-based experiments across its payment and platform services. A Toss official said the project is intended to verify infrastructure that combines Ethereum's security with a dedicated network built for local currency-based financial services while allowing interoperability with other blockchain ecosystems.

The collaboration comes weeks after Optimism completed a four-week experiment on its OP mainnet that tested stake-based transaction ordering alongside its existing gas-fee system. The pilot explored whether staking incentives could improve transaction prioritisation without changing the experience for regular users.