# Ring USD

> Ring USD (USDR) is a stablecoin operating on the Ethereum blockchain as part of the Ring Protocol ecosystem. Ring Protocol is a decentralized finance (DeFi) pro...

- Canonical URL: https://iq.wiki/wiki/ring-usd
- Categories: Cryptoassets
- Tags: DEX, Infrastructure
- Created: 2025-12-07T14:36:52.468Z
- Last updated: 2025-12-07T14:36:52.468Z
- Source: IQ.wiki — the world's largest blockchain and crypto encyclopedia (https://iq.wiki)

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**Ring USD** (USDR) is a [stablecoin](https://iq.wiki/wiki/stablecoin) that operates on the [Ethereum](https://iq.wiki/wiki/ethereum) blockchain and is part of the broader [Ring Protocol](https://iq.wiki/wiki/ring-protocol) ecosystem. It is categorized as a USD [Stablecoin](https://iq.wiki/wiki/stablecoin) and is designed to be traded on [decentralized exchanges (DEXs)](https://iq.wiki/wiki/decentralized-exchange).  [\[1\]](#cite-id-wG2HN9FbJmtzbgNy) [\[2\]](#cite-id-Kz2levcOYBk9dYMn)​

## Overview

Ring USD is intrinsically linked to its parent project, [Ring Protocol](https://iq.wiki/wiki/ring-protocol). The protocol's stated mission is to address liquidity inefficiencies in the [DeFi](https://iq.wiki/wiki/defi) sector by connecting "billions of idle assets" on-chain with crypto projects that require liquidity. The project's vision is "to build an universal liquidity protocol for maximizing asset utilization." The protocol's technology is built for [Ethereum Virtual Machine (EVM)](https://iq.wiki/wiki/ethereum-virtual-machine-evm) compatible [blockchains](https://iq.wiki/wiki/blockchain), with a specific focus on the [Ethereum](https://iq.wiki/wiki/ethereum) and [Blast](https://iq.wiki/wiki/blast) networks. [\[2\]](#cite-id-Kz2levcOYBk9dYMn) [\[3\]](#cite-id-Ighe79kJgCRAIgFt) 

## Tokenomics

The Ring Protocol ecosystem utilizes multiple tokens, each with a specific function. While USDR serves as the protocol's stablecoin, other tokens facilitate liquidity provision and governance.

### Ring USD (USDR)

Ring USD is classified as a USD [Stablecoin](https://iq.wiki/wiki/stablecoin) that primarily operates on the [Ethereum](https://iq.wiki/wiki/ethereum) blockchain as an [ERC-20](https://iq.wiki/wiki/erc-20) token. [\[1\]](#cite-id-wG2HN9FbJmtzbgNy)​

* **Supply Model:** USDR operates with a fixed supply. As of December 2025, the total supply and the circulating supply were identical at 100,400,000 USDR. [\[1\]](#cite-id-wG2HN9FbJmtzbgNy) [\[2\]](#cite-id-Kz2levcOYBk9dYMn)
* **Maximum Supply:** Despite its fixed circulating supply, the theoretical maximum supply for USDR is listed as infinite, suggesting that more tokens could potentially be minted in the future. [\[1\]](#cite-id-wG2HN9FbJmtzbgNy)
* **Blockchain Presence:** USDR exists on multiple blockchains. Its primary network is [Ethereum](https://iq.wiki/wiki/ethereum), but it is also available on the BNB Smart Chain. [\[1\]](#cite-id-wG2HN9FbJmtzbgNy) [\[2\]](#cite-id-Kz2levcOYBk9dYMn)

### Contract Addresses

Ring USD can be found on multiple EVM-compatible blockchains. The official contract addresses are:

* [**Ethereum**](https://iq.wiki/wiki/ethereum)**:** `0x4ea40dcee961675683e0a2e1721bd49cb9bca913`
* [**BNB Smart Chain**](https://iq.wiki/wiki/binance-bridged-usdc-bnb-smart-chain)**:** `0x021988d2c89b1A9Ff56641b2F247942358FF05c9`

The existence of these contracts allows USDR to be bridged and utilized across different DeFi ecosystems. [\[1\]](#cite-id-wG2HN9FbJmtzbgNy) [\[2\]](#cite-id-Kz2levcOYBk9dYMn)​