Advanced cryptographic authorization coming to CKB post-hard fork

Check out what is possible with soon to be introduced exec functionality!

The concept of “chained lock scripts" was recently proposed on the Nervos Talk forum.

The purpose of chained lock scripts is to serialize multiple lock scripts using the exec function from Linux, so that the different lock scripts can be used to verify signatures created using different crypto primitives.

A chained lockscript looks like a normal lockscript, you can even use it like a normal lock script. Each chained lock script contains validation code for one particular signature algorithm, for example, we might have chained lockscripts for secp256k1, secp256r1, RSA, Schnorr, BLS, etc.

A dApp can build an entrypoint lock script first, which is in charge of general validation of the transaction, and then proceed with confirmation of the signatures using the different chained lock scripts.

By decoupling the lock script of the cell and actual signature verification logic, CKB makes it convenient for dApps to support a variety of cryptography and delivers the greatest flexibility for innovation.

RFC

Nervos applies the RFC (Request for Comments) process for implementing every building block of the protocol. There were 27 previous RFCs, which can be found here.

Dev Updates

Core

• CKB

  • (#2707) use KeyedPriorityQueue to replace BTreeMap/HashSet

  • (#2771) remove lru cache from SinceVerifier

  • (#2774) remove lru cache from get_cellbase fn

  • (#2784) skip updating tx_verify_cache about the cellbase tx 

  • (#2785) fix: put migration version

  • (#2778) fix: miner panics since the future created by hyper 0.13 need tokio 0.2 runtime

  • (#2782) bump faux from 0.1.2 to 0.1.3

  • (#2770) doc: use community contributed site for script error codes

  • (#2773) remove several duplicate or outdated dependencies, such as hyper, futures, tokio and so on

  • (#2736) refactor: move state flag to HeadersSyncState enum

• Dev Tools

  • Lumos [JavaScript/TypeScript based dapp framework]

  • Polyjuice [an Ethereum on CKB solution]

  • Godwoken-polyjuice [polyjuice for godwoken]

    • (#41) update godwoken and godwoken-scripts dependencies

    • (#39) fix(big_mod_exp): uint8_t *content memory leaks

    • (#38) Some bug fixes

    • (#37) Interoperability refactor

  • Capsule [development framework for creating smart contract scripts in Rust for CKB]

  • Tippy [One click CKB devnet]

  • CKB-std [modules to write CKB contract with Rust]

• Neuron

• CKB Explorer

  • (#825) Add more nft tags

Layer 2

• Muta [Layer2 framework on CKB]

• SECBIT Labs [Zero knowledge proof toolkit for CKB]

• Godwoken[ [A framework to build rollup solutions upon Nervos CKB]

  • (#226) Update godwoken-scripts

  • (#223) Support charge tx fee in built-in scripts & withdrawal

  • (#219) Update generate-config command

  • (#224) implement test mode

  • (#208) Adjust for interoperability

  • (#222) Fix build

  • (#221) Fix web3-indexer log format

  • (#220) Update web3 indexer for gw tx hash

  • (#212) Impl gw-tools sub command setup-nodes

  • (#218) Add rpc get script hash by short address

Cross-chain

• force-bridge [general force bridge components]

  • (#120) fix: add prometheus metric monitor

  • (#135) fix:restore ci flow by yarn script

  • (#126) fix(offchain): add rpc test in ci

  • (#131) update deploy way by cli

  • (#132) expose getBridgeConfig in RPC

  • (#127) fix: retry error forever to avoid handler crash 

  • (#130) fix: update the deploy script and ckb start height 

  • (#129) doc: update deployment doc

  • (#128) doc: add deployment doc

  • (#124) fix: fix cli args parse 

  • (#125) docs: add dapp-user-guide.md

  • (#123) feat: lint for staged files

  • (#122) fix: verify ownerTypeHash in isBurnTx and parseMintTx

• force-bridge-btc [maps BTC on Bitcoin to cBTC on CKB in a trustless way]

• force-bridge-eth [maps ETH on Ethereum to cETH on CKB in a trustless way]

Ecosystem

• Tocial [cosplayers’ photo sharing app]

• Lay2 [pw-sdk, build dApp on CKB and run them everywhere]

• Obsidian Labs [developer IDE]

• Synapse [browser wallet and keyper agency]

• BlockABC [onechain CKB and web auth]

• GrowFi [token swap functionality]

• Obsidian Systems [CKB integration with ledger wallets]

• Summa One [BTC/CKB interoperability] (completed)

• LeapDAO [Sidechain Framework]

• Golden Legend [Nervos NFT platform]

  • NFT holders have passed 1000.

  • Sansan Studio from NetEase will sell its first NFT on Taobao with Nervina Labs

• DAS [Decentralized Account Systems]

The Nervos Foundation currently runs a grants program for builders, check out the scope and how to apply.

CKB Weekly is curated by a group of people who witnessed Lina’s birth and started this to record her growth. Any views expressed are personal and do not represent an official position of the Nervos project. Got updates or articles you would like to include? Any feedback or other suggestions? Let us know by replying to this email.

If you are interested in contributing, we welcome you to join the review group on Telegram.

Meanwhile, here are some links if you want to learn more about the project and community.

• Nervos CKB Wiki

• Nervos Nation Podcast

• Learn about Nervos and Earn CKB