Blockchain Basics
A Proxy Contract Can Keep Its Address While Its Implementation Changes
When inspecting an upgradeable smart contract, identify the proxy, its current implementation and who can authorise a change.
TOKENS · NETWORKS · CONTEXT
Blockchain Basics
Read a transaction hash, network, status and fee in a block explorer while recognising what public on-chain data cannot prove.
Blockchain Basics
A Token Burn Does Not Tell You the Whole Supply Story
Burning tokens reduces one part of supply, but issuance and unlocks can change the wider picture. Compare the same period and supply definition before drawing conclusions.
Blockchain Basics
An Ethereum Nonce Helps Explain a Transaction Waiting Behind Another
Understand the account nonce behind ordinary Ethereum transaction ordering and inspect a pending sequence before attempting another wallet action.
Blockchain Basics
A Blockchain Test Network Uses a Different Kind of Value
Understand what blockchain test networks are for, why test tokens differ from real funds and what a successful test does not prove.
Blockchain Basics
A Transaction Simulation Is a Preview, Not a Promise
Read a wallet’s simulated balance changes as an estimate, check permissions separately, and avoid treating a preview as proof of safety.
Blockchain Basics
An Ethereum Address Checksum Helps Catch Errors, Not Prove Ownership
Understand what mixed-case Ethereum address checks can detect, and why passing a checksum does not establish who controls an address.
Blockchain Basics
Token Decimals Change How a Raw Balance Is Displayed
A raw token balance needs the correct decimal scale before it becomes a readable amount. Verify token metadata instead of assuming every asset uses 18 decimals.
Blockchain Basics
What a Block Explorer Can Tell You About a Transaction
Read a transaction hash, network, status and fee in a block explorer while recognising what public on-chain data cannot prove.