DeFi Power-User Favorite · Pre-Sign Simulation

Accept Carteira Rabby Crypto Payments — Security-Simulated EVM & L2 Checkout

Built for security-conscious DeFi founders, developers, and Web3 treasuries. XPayr unverified-proxy-free splitter contracts pass Rabby pre-transaction balance simulations cleanly with zero blind-signing prompts.

Checkout FlowPre-Sign Balance-Change Simulation Web3
Protocol StandardEIP-6963 · Deterministic EVM Calldata & Permit
Tolerance / Split100% Simulation-Verified 99.5% / 0.5% Split
XPayr Fee0.5% Flat · $0/mo · Non-Custodial

Rabby Integration Architecture

Clean Pre-Execution Balance Delta in Rabby Simulation Engine

Rabby simulates every EVM transaction before signing. XPayr atomic splitters emit standard ERC-20 Transfer events so Rabby displays the exact -100.00 USDC outflow with green security checks.

Zero Unlimited Token Approvals Required

XPayr never requests infinite uint256 ERC-20 allowances. Approvals or EIP-2612 Permits are scoped strictly to the exact invoice amount, eliminating post-checkout approval revocation chores.

Automatic Per-dApp Chain Selection

Rabby switches to Base, Arbitrum, Optimism, Polygon, or Ethereum automatically without interrupting other DeFi tabs open in the buyer browser.

High-Conversion Merchant Use Cases

Developer tools, RPC/API infrastructure, DeFi analytics SaaS, TGE launchpads, and security-audited B2B checkouts.

Supported Rede Blockchains

Supported Stablecoins & Tokens

REST API v1 Session Payload

Create a checkout session pre-optimized for Rabby via POST https://xpayr.com/api/v1/payments or the xpayr_create_payment_session do MCP:

{
    "amount": "99.00",
    "currency": "USD",
    "preferred_network": "arbitrum",
    "preferred_token": "USDC",
    "checkout_mode": "web3_one_click",
    "underpayment_tolerance_pct": 1,
    "underpayment_tolerance_max_usd": 0.5,
    "order_id": "ord_rabby_4082",
    "webhook_url": "https://merchant.example.com/webhooks/xpayr",
    "metadata": {
        "wallet_corridor": "rabby",
        "settlement_model": "99.5_pct_non_custodial"
    }
}

Related Engineering Blueprints

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Carteira Rabby Checkout — Perguntas Frequentes

Does XPayr ever ask Rabby users for unlimited ERC-20 token approvals?

Never. Every XPayr checkout scopes token approval or EIP-2612 Permit strictly to the exact session invoice amount.

Why do Web3 power users prefer Rabby on XPayr checkouts?

Rabby shows the exact simulated token balance change and verifies recipient contract behavior prior to signing — confirming XPayr non-custodial 99.5% / 0.5% split transparency.

Can merchants also sign Central de Repasses batch dispersions with Rabby?

Yes! Merchants love using Rabby with Central de Pagamentos XPayr (/payouts) because Rabby previews the exact aggregate multi-recipient batch outflow before hardware or extension signing.