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78. Solana Web3.js v2 (@solana/kit)

Modular, functional, tree-shakeable JavaScript SDK.

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The modern `@solana/web3.js` (v2 / `@solana/kit`) replaces monolithic classes with pure, tree-shakeable functional primitives, nominal branded types (`Address`), and modern async streaming RPCs.

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1. What is the key architectural improvement of @solana/web3.js v2 over v1?
Modular, tree-shakeable functional design with branded nominal types and zero runtime bloatReplaces JSON with XMLRemoves async/awaitRuns only on Node.js
2. How are addresses typed in @solana/web3.js v2?
Branded Address type string (Address<"...">)PublicKey class instancenumber arrayBigInt

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