Contract Directory

VelumX maintains a minimal on-chain footprint. The only contract VelumX deploys is the reference paymaster for the VelumX DeFi frontend.

Stacks Mainnet

Contract	Address	Status	Purpose
VelumX DeFi Paymaster v1	`SPKYNF473GQ1V0WWCF24TV7ZR1WYAKTC7AM8QGBW.velumx-defi-paymaster-v1`	🟢 Active	Bitflow swaps + USDCx bridge reference

Deprecated Contracts

The following contracts are no longer used. They remain on-chain (Clarity contracts are immutable) but are not referenced by any active VelumX infrastructure.

Contract	Address	Status
Universal Paymaster v5	`SPKYNF473GQ1V0WWCF24TV7ZR1WYAKTC7AM8QGBW.universal-paymaster-v5`	🔴 Deprecated
VelumX Registry v1	`SPKYNF473GQ1V0WWCF24TV7ZR1WYAKTC7AM8QGBW.velumx-registry-v1`	🔴 Deprecated
VelumX Relayer v1	`SPKYNF473GQ1V0WWCF24TV7ZR1WYAKTC7AM8QGBW.velumx-relayer-1`	🔴 Deprecated
VelumX Paymaster 1-1	`SPKYNF473GQ1V0WWCF24TV7ZR1WYAKTC7AM8QGBW.velumx-paymaster-1-1`	🔴 Deprecated

Third-Party Contracts Used

Bitflow StableSwap Pools

Pool	Contract
STX / stSTX	`SPQC38PW542EQJ5M11CR25P7BS1CA6QT4TBXGB3M.stableswap-stx-ststx-v-1-2`
aeUSDC / sUSDT	`SPQC38PW542EQJ5M11CR25P7BS1CA6QT4TBXGB3M.stableswap-aeusdc-susdt-v-1-2`
USDA / aeUSDC	`SPQC38PW542EQJ5M11CR25P7BS1CA6QT4TBXGB3M.stableswap-usda-aeusdc-v-1-4`
aBTC / xBTC	`SPQC38PW542EQJ5M11CR25P7BS1CA6QT4TBXGB3M.stableswap-abtc-xbtc-v-1-2`

Bitflow Router Contracts

Router	Contract
STX/stSTX via ALEX	`SPQC38PW542EQJ5M11CR25P7BS1CA6QT4TBXGB3M.router-stx-ststx-bitflow-alex-v-2-1`
STX/stSTX via Velar	`SPQC38PW542EQJ5M11CR25P7BS1CA6QT4TBXGB3M.router-stx-ststx-bitflow-velar-v-1-2`
STX/stSTX via Arkadiko	`SPQC38PW542EQJ5M11CR25P7BS1CA6QT4TBXGB3M.router-stx-ststx-bitflow-arkadiko-v-1-1`
StableSwap/XYK	`SPQC38PW542EQJ5M11CR25P7BS1CA6QT4TBXGB3M.router-stableswap-xyk-v-1-3`

USDCx Bridge

Contract	Address
USDCx v1	`SP120SBRBQJ00MCWS7TM5R8WJNTTKD5K0HFRC2CNE.usdcx-v1`

Developer-Deployed Contracts

Developers who integrate USER_PAYS deploy their own paymaster contracts. VelumX does not maintain a registry of these contracts — they are owned and operated entirely by the developer. Use velumx-defi-paymaster-v1 as your starting template. See The Paymaster Pattern for details.

Introduction

Protocol Architecture

Developer Implementation

Relayer API Reference

Infrastructure Reference

Contract directory

Contract Directory

Stacks Mainnet

Deprecated Contracts

Third-Party Contracts Used

Bitflow StableSwap Pools

Bitflow Router Contracts

USDCx Bridge

Developer-Deployed Contracts

​Contract Directory

​Stacks Mainnet

​Deprecated Contracts

​Third-Party Contracts Used

​Bitflow StableSwap Pools

​Bitflow Router Contracts

​USDCx Bridge

​Developer-Deployed Contracts

Contract Directory

Stacks Mainnet

Deprecated Contracts

Third-Party Contracts Used

Bitflow StableSwap Pools

Bitflow Router Contracts

USDCx Bridge

Developer-Deployed Contracts