Overview

The UniversalRouter is an ETH and ERC20 swap router used by Ring integrations. In the current Ring docs, read it as routing infrastructure for Ring Swap (v2), FewToken-aware flows, and external Uniswap v4 integration paths. It should not be read as evidence that Ring has additional native AMM product lines.

The flexible command-based architecture enables:

• Splitting and interleaving of Ring Swap and supported external routing paths
• Partial fills of trades
• Wrapping and unwrapping of ETH (via WETH)
• Time-bound, signature-controlled token approvals using Permit2
• external venue command support where those integrations are explicitly used
• Sub-plan execution and balance checks

Transactions are encoded as a sequence of byte-sized commands, each with structured inputs. These commands can be chained within a single transaction to express customized workflows, including multi-hop swaps, supported external integrations, and complex value routing, all without the need for prior token approvals.

Note: The UniversalRouter integrates with Permit2 to eliminate the need for direct token approvals. See the Permit2 documentation for details.

Resources

Use the current Ring Swap deployments for Universal Router addresses.