Learn: Cheat sheet — Common RPC methods (slice of #33)

[PetarStoev02]

Context

This is a focused slice of #33 (Cheat sheets). Cheat sheets are most useful when each one is a single page on a single topic — easier to scan, link to, and post about than one mega-document.

This issue covers a cheat sheet for the most common JSON-RPC methods developers actually use against EVM and Solana nodes.

What to build

Add cheat-sheets/rpc-methods.md containing:

• One-line description of JSON-RPC for context
• A table of the most-used EVM methods (eth_getBalance, eth_call, eth_sendRawTransaction, eth_getLogs, eth_getTransactionReceipt, etc.) with: method name, what it does, when to use it, gas/fee implications, common gotchas
• A table of the most-used Solana RPC methods (getBalance, getAccountInfo, sendTransaction, getSignatureStatuses, getProgramAccounts, etc.) with the same columns
• A short "when to call which" decision guide
• Links to deeper reference docs

Style should match existing learn content — code-first, TS/JS friendly examples in code blocks.

Acceptance criteria

• cheat-sheets/rpc-methods.md exists and renders cleanly on GitHub
• EVM section covers at least 8 commonly used methods
• Solana section covers at least 6 commonly used methods
• Each method row is concise — no walls of text
• Linked from the cheat-sheets index (or root README) when one exists

Pointers

• Slice of: Content: Cheat sheets (RPC methods, token standards) #33
• Reference: ethereum.org JSON-RPC docs, solana.com/docs/rpc

Complexity

🟢 Good first issue

[peter941221]

I'd like to work on this.