chore: sync content to repo

src/data/roadmaps/blockchain/content/arbitrum@A_yVDg-6b42ynmh71jk1V.md

@@ -1,3 +1,5 @@
+# undefined
+
 Arbitrum is a Layer-2 scaling solution designed to improve the speed and reduce the costs of transactions on the Ethereum blockchain. It operates by executing transactions off-chain and then posting the results back to the main Ethereum chain, leveraging optimistic rollups to achieve higher throughput and lower gas fees compared to directly interacting with Ethereum. This allows for more complex and scalable decentralized applications (dApps) to be built and used without being constrained by the limitations of the base layer.
 
 Visit the following resources to learn more:

src/data/roadmaps/blockchain/content/blockchain-networks@nuq_juiBSecI7PwERR_4R.md

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 # Blockchain Networks
 
-Blockchain networks are the underlying infrastructure that allows blockchains to operate. They are essentially distributed ledgers shared among multiple participants. There are four main types: *public blockchains*, which are permissionless and open to anyone; *private blockchains*, which are permissioned and controlled by a single organization; *consortium blockchains*, which are also permissioned but governed by a group of organizations; and *hybrid blockchains*, which combine elements of both public and private blockchains.
+Blockchain networks are the underlying infrastructure that allows blockchains to operate. They are essentially distributed ledgers shared among multiple participants. There are four main types: _public blockchains_, which are permissionless and open to anyone; _private blockchains_, which are permissioned and controlled by a single organization; _consortium blockchains_, which are also permissioned but governed by a group of organizations; and _hybrid blockchains_, which combine elements of both public and private blockchains.
 
 Visit the following resources to learn more:
 

src/data/roadmaps/blockchain/content/cryptography--hashing@e_I-4Q6_qIW09Hcn-pgKm.md

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-# Cryptography & Hashing
+# Cryptography
 
-Cryptography is the art of secure communication, using techniques to encrypt (scramble) messages so only the intended recipient can read them. Hashing is a process that takes any input and produces a fixed-size string of characters, called a hash. This hash acts like a unique fingerprint of the input data. Even a tiny change to the original input will result in a drastically different hash.
+Cryptography is the art of secure communication. It involves techniques for encrypting messages, making them unreadable to anyone except the intended recipient who possesses the key to decrypt them. It also provides methods for verifying the authenticity and integrity of data, ensuring that it hasn't been tampered with and that it truly comes from the claimed source.
 
 Visit the following resources to learn more:
 

src/data/roadmaps/blockchain/content/introduction@MvpHHpbS-EksUfuOKILOq.md

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-# Blockchain
+# Basic Blockchain Knowledge
 
-Blockchain is essentially a shared, immutable record of transactions or data, organized into blocks that are linked together chronologically using cryptography. Each block contains a hash of the previous block, creating a chain that is resistant to modification. This distributed ledger technology allows for secure and transparent data management without the need for a central authority.
+Understanding the fundamental concepts of blockchain technology is essential. This includes grasping what a blockchain is – a distributed, immutable ledger – and how it operates through cryptographic principles. Key elements involve understanding blocks, transactions, hashing, consensus mechanisms, and the decentralized nature of the system.
 
 Visit the following resources to learn more:
 

src/data/roadmaps/blockchain/content/optimism@EK5TqRRn15ExsGc4gfMLu.md

@@ -4,7 +4,7 @@ Optimism is a Layer 2 scaling solution for Ethereum. It aims to improve transact
 
 Visit the following resources to learn more:
 
+- [@book@Optimism Explained: Layer 2 Scaling & How It Differs from Arbitrum](https://www.youtube.com/watch?v=Rte3fQY6xy4)
 - [@official@Optimism](https://www.optimism.io/)
 - [@official@Optimism Documentation](https://docs.optimism.io/)
-- [@book@Optimism Explained: Layer 2 Scaling & How It Differs from Arbitrum](https://www.youtube.com/watch?v=Rte3fQY6xy4)
 - [@video@How To Use Ethereum Optimism L2 (2025)](https://www.youtube.com/watch?v=KsYFeG4mBoE)

src/data/roadmaps/blockchain/content/vs-code@J4ev2h5cipcwh3OcuBdMU.md

@@ -6,6 +6,6 @@ Visit the following resources to learn more:
 
 - [@official@Visual Studio Code](https://code.visualstudio.com/o)
 - [@official@Docs - Visual Studio Code](https://code.visualstudio.com/docs)
-- [@video@FreeCodeCamp Crash Course](https://www.youtube.com/watch?v=WPqXP_kLzpo)
 - [@article@VSCode Basics](https://www.youtube.com/watch?v=B-s71n0dHUk)
-- [@article@VSCode in 100 Seconds](https://www.youtube.com/watch?v=KMxo3T_MTvY)
+- [@article@VSCode in 100 Seconds](https://www.youtube.com/watch?v=KMxo3T_MTvY)
+- [@video@FreeCodeCamp Crash Course](https://www.youtube.com/watch?v=WPqXP_kLzpo)