Supported Networks
| Network | Chain ID | Status | RPC Endpoint |
|---|---|---|---|
| BNB Chain Mainnet | 56 | Live | https://bsc-dataseed1.binance.org |
| Base Mainnet | 8453 | Live | https://mainnet.base.org |
Supported Tokens
BNB Chain Mainnet
| Token | Symbol | Address | Decimals |
|---|---|---|---|
| Tether USD | USDT | 0x55d398326f99059fF775485246999027B3197955 | 18 |
| USD Coin | USDC | 0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d | 18 |
| WLFI USD | USD1 | 0x8d0d000ee44948fc98c9b98a4fa4921476f08b0d | 18 |
Base Mainnet
| Token | Symbol | Address | Decimals |
|---|---|---|---|
| USD Coin | USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 6 |
| Tether USD | USDT | 0xfde4c96c8593536e31f229ea8f37b2ada2699bb2 | 6 |
Contract Addresses
BNB Chain Mainnet
| Contract | Address | Purpose |
|---|---|---|
| B402 RelayerV3 | 0xE91b564EB8DFF305Ff8efA332f84c487b9da5171 | EIP-712 payment settlement |
| Nexus Account Factory | 0x0000006648ED9B2B842552BE63Af870bC74af837 | Smart wallet deployment |
| Nexus Bootstrap | 0x0000003eDf18913c01cBc482C978bBD3D6E8ffA3 | Smart wallet initialization |
| EntryPoint (v0.7) | 0x0000000071727De22E5E9d8BAf0edAc6f37da032 | ERC-4337 UserOp execution |
Base Mainnet
| Contract | Address | Purpose |
|---|---|---|
| B402 RelayerV3 | 0xE91b564EB8DFF305Ff8efA332f84c487b9da5171 | EIP-712 payment settlement |
| Privacy Proxy | 0x26111e2379E5fC0A7Cd8728fe52c7b84CA4fbE85 | Privacy pool proxy |
| Privacy Pool Wallet Impl | 0x92Ab00D5DCBcf3bC2af010c6eA94fe57a9A3331D | Privacy pool smart wallet implementation |
| PoseidonT3 | 0xB407837aD487EF6DD1044CcEEF13f111A334503A | ZK-friendly hash (3 inputs) |
| PoseidonT4 | 0x9dB0eDC77C9047a06Fd6dE82c892630DAa5eF601 | ZK-friendly hash (4 inputs) |
| Delegator | 0xa5F50a2670dfc3b41616DEC18Db7335B8235404D | Delegation contract |
| ProxyAdmin | 0x3BD317f5032a2Ae809a4640F3CEC7868b04d759A | Proxy administration |
| Treasury Impl | 0x22eb6c6f31fCaDD62eF4C6E64fCC6Fe39F699F51 | Treasury implementation |
| Treasury Proxy | 0x56F75ed712d7e26602Db9cD3664Da3CA75d4Ad26 | Treasury proxy |
| RelayAdapt | 0xB0BC6d50098519c2a030661338F82a8792b85404 | Relay adapter |
Facilitator Endpoints
| Service | URL | Description |
|---|---|---|
| Facilitator API | https://facilitatorv3.b402.ai | Payment verification and settlement |
Block Explorers
| Network | Explorer | URL |
|---|---|---|
| BNB Chain Mainnet | BscScan | https://bscscan.com |
| Base Mainnet | BaseScan | https://basescan.org |
Token Notes
Token decimals vary by chain. On BNB Chain, all tokens use 18 decimals (1 USDT =1000000000000000000). On Base, USDC and USDT use 6 decimals (1 USDC = 1000000). Always check the token’s decimals for the target chain.
Token whitelisting. Only tokens whitelisted on the Relayer contract can be used for payments. The tokens listed above are currently whitelisted.
Adding new tokens. New token support requires whitelisting on the Relayer contract by the contract owner. Contact the b402 team to request new token support.