> For the complete documentation index, see [llms.txt](/ja/llms.txt).

Programmable payments on Rootstock are normal EVM contracts with Bitcoin-anchored finality. Gas costs and confirmation time depend on network load and how you batch work. **USDRIF**, **RIF Relay**, HTTP 402 flows, and **Prism** splits each solve different jobs. Pick the stack that matches your product and disclose fees and settlement time to users.

## Core pillars

| Pillar                        | Description                                                                   | Where to go                                                                                                                                 |
| :---------------------------- | :---------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------ |
| **Prism payment splits**      | One Lightning or on-chain payment splits to multiple recipients on Rootstock. | [Prism payment splits](/use-cases/payments-assets/prism-payment-splits/)                                                                    |
| **x402 and agentic commerce** | Machine clients pay for HTTP resources with on-chain settlement.              | [Integrating x402 Payments with Rootstock](/use-cases/payments-assets/integrate-x402/)                                                      |
| **ERC-20 and rBTC**           | Fungible tokens and native rBTC for checkout, escrow, and streaming.          | Contract patterns in your stack (Hardhat, Foundry) plus [RIF Relay](/developers/integrate/rif-relay/overview/) when you need sponsored gas. |

## Key concepts

### 1. ERC-20 assets

ERC-20 tokens work on Rootstock the same way as on other EVM chains. Wallets and indexers you already use apply, but you must verify token addresses per network (mainnet vs testnet).

### 2. Native rBTC payments

rBTC is the native gas token and is pegged 1:1 to BTC through the PowPeg. Users need rBTC for gas unless you sponsor fees with RIF Relay or a similar paymaster pattern.

### 3. Programmable money

Contracts can hold funds, release them on conditions, or stream them over time. You still need clear failure handling, upgrade policies, and user messaging when a payment path reverts.

## Tools

- **Hardhat / Foundry:** Write and test payment and escrow contracts.
- **RIF Relay SDK:** Sponsored or token-paid gas for end users.
- **Explorers and indexers:** Confirm settlement and build support tooling.

## Implementation guides