S16 E37: Andrew Poelstra on Simplicity, Bitcoin Smart Contracts & Upgrades

Simplicity, a scripting language so simple that it can fit on a t-shirt, has finally launched on Liquid after a decade of development. Andrew Poelstra, who works as director of research at Blockstream, explains how it works & why it's good for Bitcoin. Time stamps: (00:00:50) Introducing Andrew Poelstra (00:01:45) Simplicity: Now Live on Liquid (00:02:12) Elements and Liquid’s Technical Evolution (00:03:09) Is Simplicity a Response to Solidity? (00:05:40) Simplicity’s Programming Model & Rust Inspiration (00:08:04) Demo Applications and Simplicity Playground (00:10:03) Why Not Stick with Bitcoin Script? (00:11:48) Bitcoin Script’s Limitations and Quirks (00:19:14) Simplicity’s Capabilities: Computation & Covenants (00:22:26) Formal Verification and Multi-Language Implementations (00:25:21) Machine-Checkable Proofs and Contract Safety (00:29:07) Covenants, OP_CAT, and Script Extension Fears (00:33:26) Simplicity as a Future Script Extension Path (00:34:31) Ethereum’s Design Mistakes & Simplicity’s Approach (00:53:00) Simplicity’s Lateness and Ethereum’s Rise (01:01:12) Simplicity’s Usability and Adoption Challenges (01:04:18) Potential Use Cases for Simplicity: Vaults, Business Logic, Quantum Signatures (01:08:06) Wallets and Simplicity Integration (01:16:30) Simplicity vs. Soft Forks for New Opcodes (01:19:01) Jets: Optimizing Simplicity with Native Code (01:22:44) Collider Script and High-Cost Emulation (01:24:44) Resource Limits and Transaction Size (01:29:34) Non-Scammy, Technologically Interesting Altcoins: Monero, Zcash, Grin, and Sia (01:33:14) Where to Learn More About Simplicity

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