# BRRR > Payment layer for programmable money. ## Documentation Sets - [BRRR](https://brrr.network/llms-full.txt): Payment layer for programmable money. ## BRRR Knowledge Base Learn about BRRR. How it works, where it works, and why it works. - [What is BRRR - BRRR](https://brrr.network/knowledge-base/what): What is BRRR token. - [BRRR Details - BRRR](https://brrr.network/knowledge-base/details): Onchain contract details. - [Distribution - BRRR](https://brrr.network/knowledge-base/distribution): How is the token distributed. - [Emission - BRRR](https://brrr.network/knowledge-base/emission): Dynamic emission curve. - [Validation - BRRR](https://brrr.network/knowledge-base/validation): What is it? And how to participate. - [Risk Disclosures - BRRR](https://brrr.network/knowledge-base/risk-disclosures): Learn about risks involved. ## Content - [Curve x BRRR](https://brrr.network/case-studies/curve): Building an onchain FX marketplace with Curve on BRRR. - [AAVE x BRRR](https://brrr.network/case-studies/aave): Building a lend and spend market for real-world payments with AAVE on BRRR. - [Arbitrum x BRRR](https://brrr.network/case-studies/arbitrum): Building real-time onchain settlement with Arbitrum and BRRR. - [Tether x BRRR](https://brrr.network/case-studies/tether): Building native multi‑network settlement for global stablecoin payments with Tether on BRRR. - [Plasma x BRRR](https://brrr.network/case-studies/plasma): Building real-time payments for stablecoins with Plasma and BRRR. - [Starknet x BRRR](https://brrr.network/case-studies/starknet): Building real-time onchain settlement with Starknet and BRRR. - [Solana x BRRR](https://brrr.network/case-studies/solana): Enabling real‑time crypto payments and markets efficiency with Solana and BRRR. - [Skale x BRRR](https://brrr.network/case-studies/skale): Enabling gas‑free blockchain innovation for DeFi and global payments with Skale and BRRR. - [Introduction - BRRR SDK](https://brrr.network/documentation/introduction): BRRR SDK provides methods to on/off ramp crypto in Typescript/Javascript environment. The process is split in only a few steps and allows you to customize customer flow and UI. - [Installation - BRRR SDK](https://brrr.network/documentation/installation): How to install BRRR SDK. - [Initialization - BRRR SDK](https://brrr.network/documentation/initialization): How to initialize BRRR SDK using Holyheld API key. - [Web3 Providers - BRRR SDK](https://brrr.network/documentation/web3-providers): How to work with different Web3 providers for various blockchain networks. - [Offramp Flow - BRRR SDK](https://brrr.network/documentation/off-ramp-flow): How does offramping mechanism work. - [Onramp Flow - BRRR SDK](https://brrr.network/documentation/on-ramp-flow): How does onramping mechanism work. - [Utilities - BRRR SDK](https://brrr.network/documentation/utilities): How to use utilities to work with various blockchain networks. - [Error handling - BRRR SDK](https://brrr.network/documentation/error-handling): Developer tools for debugging, error handling, and testing. - [Logging - BRRR SDK](https://brrr.network/documentation/logging): Developer tools for debugging, error handling, and testing. - [Examples - BRRR SDK](https://brrr.network/documentation/examples): Developer tools for debugging, error handling, and testing. - [Testing - BRRR SDK](https://brrr.network/documentation/testing): Developer tools for debugging, error handling, and testing.