Skip to main content
Plasma is built around a clear principle: stablecoins should be a first-class primitive, not an afterthought added to a general-purpose chain. To support that, Plasma maintains a set of protocol-operated contracts designed for stablecoin usability. These contracts enable any developer to build apps with better defaults: zero fees, stablecoin-based gas, and confidential transfers. All without forking infrastructure, writing wrappers, or changing wallets. They are written in standard Solidity, compatible with the full EVM toolchain, and integrated directly into Plasma’s execution layer.

​
Why these Contracts Exist

Stablecoins today are treated like generic ERC-20 tokens. That works at small scale, but creates friction when used for real financial flows:
  • Fees must be paid in a separate gas token
  • Every app or wallet has to manage its own paymaster
  • Private payments are not possible
Developers are forced to stitch together fragmented tools, often relying on external tokens or fragile integrations. This adds cost, risk, and limits adoption. Plasma takes a different approach. Stablecoin infrastructure is part of the protocol. The chain itself runs and maintains the core modules used by apps and wallets.

​
The Three Modules

​
Zero-Fee USD₮ Transfers

A protocol-managed paymaster system that lets users send USD₮ without paying gas. Identity-based rate limits prevent abuse. Developers can route transfer and transferFrom calls through standard smart account flows using Plasma’s prebuilt paymaster. No XPL required, no third-party relayers.

​
Custom Gas Tokens

Users can pay for any transaction using whitelisted stablecoins like USD₮ or BTC. Plasma runs an ERC-20 paymaster that handles pricing and gas payment directly. No swaps, no balance routing, and no dependency on holding native gas.

​
Confidential Payments

A private transfer system for stablecoins with shielded amounts and metadata. Built for payroll, B2B flows, and financial apps that require privacy without compromising EVM compatibility. Each module is operated by the Plasma protocol. The chain handles enforcement, pricing, and coordination under the hood.

​
Fully Compatible by Design

All contracts:
  • Use standard Solidity and ERC interfaces
  • Work with any EVM wallet or contract system
  • Support EIP-4337 or EIP-7702
There are no new wallet formats and no protocol lock-in. Wallets and apps can adopt these modules incrementally, without changing user flows or architecture.

​
Why it Lives in the Protocol

These systems can be built externally. But when done by individual apps, they are expensive to maintain, hard to standardize, and rarely interoperable. By operating them at the protocol level, Plasma can:
  • Ensure consistency across all applications
  • Subsidize gas without third-party funding tokens
  • Apply shared limits and controls
  • Integrate deeply with block production and execution logic

​
What to Expect

The stablecoin-native contract suite will launch shortly after mainnet beta. The first release will include:
  • Zero-fee USD₮ transfers
  • Custom gas tokens for USD₮ and BTC
Each module will ship with complete guides, integration examples, and testnet support.
⌘I