Supported chains and tokens

BYO wallets support a subset of the chains available for managed wallets. Unlike managed wallets, BYO wallets on Tempo are not supported in Phase 1 — address monitoring is only available on EVM-compatible chains.

Supported chains

Chain	Chain ID	Tokens	x402 (ERC-3009)	Deposit monitoring	Testnet
Base	8453	USDC	✓	✓	Base Sepolia (84532)
Ethereum	1	USDC, USDT	✓	✓	Sepolia (11155111)
Optimism	10	USDC	✓	✓	OP Sepolia (11155420)
Arbitrum	42161	USDC	✓	✓	Arbitrum Sepolia (421614)
Polygon	137	USDC	✓	✓	Polygon Amoy (80002)
Tempo	4217	—	—	—	—

Tempo is not supported for BYO wallets in Phase 1. Use a managed wallet for Tempo/MPP payments.

Using the Chain enum

import { initialise, Chain, Token } from '@prudra/core';
import { registerBYOWallet } from '@prudra/wallet';

initialise({ apiKey: process.env.PRUDRA_API_KEY! });

// Base USDC wallet
const baseWallet = await registerBYOWallet({
  address:         '0x742d35Cc...',
  chain:           Chain.BASE,
  supportedTokens: [Token.USDC],
});

// Ethereum wallet monitoring both USDC and USDT
const ethWallet = await registerBYOWallet({
  address:         '0x742d35Cc...',
  chain:           Chain.ETHEREUM,
  supportedTokens: [Token.USDC, Token.USDT],
});

Token details

Token	Contract standard	Chains
USDC	ERC-20, ERC-3009	Base, Ethereum, Optimism, Arbitrum, Polygon
USDT	ERC-20	Ethereum

USDC implements ERC-3009 (transferWithAuthorization), which is required for x402 payments. USDT does not implement ERC-3009 — it can be monitored for deposits but cannot be used in x402 payment flows.

Monitoring scope

When you register a BYO wallet with supportedTokens: [Token.USDC], Prudra only fires deposit.success webhooks for USDC transfers. Other token transfers to the same address are ignored. To monitor multiple tokens, include them all in supportedTokens:

await registerBYOWallet({
  address:         '0x742d35Cc...',
  chain:           Chain.ETHEREUM,
  supportedTokens: [Token.USDC, Token.USDT],  // both monitored
});

Plan limits

Plan	BYO wallets
Hobby	1
Pro	5
Enterprise	Unlimited

Each registered BYO wallet counts against your plan limit regardless of how many tokens it monitors. One wallet address on one chain = one slot.

Register a BYO wallet — registration guide
Monitor deposits — how deposit detection works
Managed wallet chains — chains available for managed wallets