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# The Developer Handbook: How to Build on the Blockchain

Value transfers should be as seamless as streaming digital data. Learn to integrate decentralized, lightning-fast micro-transactions directly into your Python apps using the XRP Ledger.

- **Speakers:** Matt Hamilton
- **Event:** World Congress 2021
- **Published:** June 28, 2021
- **Duration:** 42:05
- **URL:** https://www.wearedevelopers.com/videos/223-the-developer-handbook-how-to-build-on-the-blockchain

## Summary

Global information sharing is instant, yet cross-border payments remain slow, expensive, and fragmented. By leveraging decentralized finance (DeFi) and the tokenization of assets, developers can transform how value moves across networks. The XRP Ledger addresses this disparity through a native decentralized exchange (DEX) and fast, low-cost block settlements, providing an infrastructure where value transfers are as seamless as streaming digital data.

Developers can integrate these frictionless payment mechanisms directly into traditional applications using open-source client libraries like Python's xrpl-py. Instead of relying entirely on custom on-chain smart contracts—such as Ethereum's Solidity—the XRP Ledger utilizes robust built-in functionalities for automated market making, token issuance, and escrows. By utilizing the testnet and available APIs, engineering teams can execute complex financial movements, such as atomic multi-hop transactions. This allows automated pathfinding algorithms to bridge fragmented liquidity, instantly determining the cheapest route to fund a Bitcoin destination address via a US dollar source without trusted third parties.

Reducing transaction costs to fractions of a cent structurally unlocks entirely novel business models, particularly within the Internet of Things (IoT). High-speed micro-transactions enable machines to handle automated invoicing without centralized accounts or complex user authentication, shifting toward paradigms where a device autonomously pays for network access by the second. While widespread blockchain adoption still hinges on evolving regulatory frameworks and modernizing batch-based legacy systems, embedding universally interoperable ledgers equips developers to build a foundation for greater financial inclusion and global transactional equity.

**Keywords:** xrpl python sdk, decentralized finance implementation, cross-border blockchain payments, xrp ledger decentralized exchange, cryptocurrency pathfinding algorithms, native tokenization functionality, smart contract alternatives, iot machine-to-machine payments, blockchain micro-transactions, solidity vs built-in ledgers, open source blockchain integration, atomic multi-hop transactions, defi liquidity fragmentation, blockchain regulatory adoption, testnet developer workflows

## Chapters

1. **Introduction to Ripple and the state of global payments** (00:03) — Current international payment systems lag behind global information transfer speeds.
1. **Differences between RippleNet and the XRP ledger** (02:18) — RippleNet handles institutional fiat transfers while the decentralized XRP ledger manages permissionless value exchange.
1. **Common blockchain use cases beyond financial transactions** (03:15) — Distributed ledgers solve distinct tracking needs across medical records, royalties, identity, and supply chains.
1. **The rise of tokenization and non-fungible assets** (05:08) — Tokenizing physical and digital assets drives a massive need for interoperable ecosystems and exchange methods.
1. **Navigating decentralized finance and fragmented network liquidity** (06:43) — Moving value fluidly between fragmented networks requires decentralized exchanges and cross-ledger protocols.
1. **Leveraging XRP as a universal bridge currency** (08:51) — Native ledger functions bypass smart contract complexities to lower transaction fees and accelerate settlements.
1. **Getting started with open source XRP ledger libraries** (11:21) — Client libraries for Python, JavaScript, and Java offer streamlined integration to connect modern applications to payment functionality.
1. **Executing a simple XRP payment via Python** (13:11) — A quick code demonstration shows how to connect wallets, sign transactions, and deploy funds on the testnet.
1. **Building multi-hop cross-currency transactions with pathfinding** (22:20) — Built-in decentralized exchange algorithms automatically convert fiat to cryptocurrency along the cheapest network liquidity routes.
1. **Smart contracts and decentralized finance development approaches** (30:45) — Developers entering decentralized ecosystems can utilize Ethereum frameworks or native ledger extensions like Hooks.
1. **Envisioning the future of frictionless machine payments** (34:28) — Seamless interoperability will allow connected devices to independently negotiate and settle real-time usage costs.
1. **Adapting supply chains to low overhead microtransactions** (38:00) — Eliminating standard financial latency and costs permanently alters global settlement sizes and batching requirements.
1. **Integrating local connected devices with blockchain endpoints** (39:39) — Decentralized payment rails can run on small hardware like dispensing robots for automated authorization.

## Related Moments

- [Real-world enterprise and startup blockchain adoption](https://www.wearedevelopers.com/videos/1368-solving-real-world-problems-with-blockchain-at-algorand-brian-whippo) (from "Solving Real-world Problems with Blockchain at Algorand - Brian Whippo")
- [Exploring decentralized web applications beyond basic cryptocurrency transactions](https://www.wearedevelopers.com/videos/634-debunking-the-top-10-myths-about-web-3) (from "Debunking the Top 10 Myths about Web 3")
- [Introduction to blockchain, NFTs, and smart contracts](https://www.wearedevelopers.com/videos/877-blockchain-nft-and-smart-contracts-for-my-application) (from "Blockchain, NFT and smart contracts for my application")
- [Improving fintech operations and cross-border settlement speeds](https://www.wearedevelopers.com/videos/931-how-to-build-for-decentralized-systems) (from "How to Build for Decentralized Systems")
- [Introduction to interoperable apps on Bitcoin](https://www.wearedevelopers.com/videos/151-an-introduction-to-operate-sv) (from "An introduction to Operate SV")
- [Reducing transaction fees and understanding stablecoins](https://www.wearedevelopers.com/videos/1368-solving-real-world-problems-with-blockchain-at-algorand-brian-whippo) (from "Solving Real-world Problems with Blockchain at Algorand - Brian Whippo")

## Related Articles

- [From Hype to Code: Real Blockchain Use Cases for Developers](https://www.wearedevelopers.com/magazine/620-from-hype-to-code-real-blockchain-use-cases-for-developers)
- [Why Blockchain? A Developer’s Perspective](https://www.wearedevelopers.com/magazine/616-why-blockchain-a-developer-s-perspective)
- [7 tips on how to become a blockchain developer](https://www.wearedevelopers.com/magazine/53-7-tips-on-how-to-become-a-blockchain-developer)
- [Cryptocurrencies For Blockchain Developers](https://www.wearedevelopers.com/magazine/5-cryptocurrencies-for-blockchain-developers)

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