What is a blockchain in simple terms?

A blockchain is a digital ledger of transactions maintained by a network of computers (nodes) rather than a single company. Each transaction is grouped into a block, and each block is linked to the previous one — creating an immutable chain. No single party controls it, and every node holds a complete copy, making the record highly resistant to tampering.

What can I see on a TON blockchain explorer like Tonviewer?

A TON blockchain explorer like Tonviewer lets you look up any wallet address or transaction ID to see the amounts transferred, the sending and receiving addresses, the confirmation timestamp, and the current network status. You can verify that a transaction completed successfully without needing to trust any third party — the data is directly from the blockchain.

Tonkeeper Education Hub #1: What Is Blockchain and How Does a Blockchain Explorer Work?

Tonkeeper Education Hub — blockchain basics and blockchain explorers explained for TON users

Welcome to the first installment of the Tonkeeper Education Hub — a series covering crypto and blockchain fundamentals for users at every level. Whether you are sending your first USDT through Telegram or managing multiple wallets, understanding the underlying technology helps you use it more confidently and safely.

This edition covers two foundational concepts:

What is a blockchain?
What is a blockchain explorer — and how to use one on TON?

What Is Blockchain?

A blockchain is a distributed digital ledger that records transactions permanently and transparently. Unlike a bank database — controlled by one institution — a blockchain is maintained simultaneously by thousands of independent computers called nodes, each holding a complete copy of the entire record.

Transactions are grouped into blocks. Each block contains a cryptographic reference to the block before it, forming a chain. This structure makes altering past records computationally impractical: changing one block would invalidate every block that follows it, and the change would need to be accepted by the majority of the network's nodes simultaneously.

When you send TON or USDT through Tonkeeper, here is what happens step by step:

Your transaction is broadcast to the TON network.
Nodes (validators) verify that you have sufficient funds and that the transaction is properly signed by your wallet key.
The validated transaction is included in a block, which is added to the TON blockchain.
The updated balance reflects in your Tonkeeper wallet.

No bank approved the transfer. No customer service agent was involved. The validators are running the TON protocol automatically, compensated by the transaction fee you paid.

What Is a Blockchain Explorer?

A blockchain explorer is a public search tool that provides read-only access to the contents of a blockchain. Think of it as a real-time, public audit trail for every transaction that has ever occurred on the network.

For the TON blockchain, Tonviewer is the primary explorer. It requires no login, no account, and no permissions. Anyone can use it.

What you can do with Tonviewer:

Look up a transaction ID — enter the transaction hash to see the amount sent, the sending and receiving addresses, the timestamp, and the number of confirmations.
Look up a wallet address — see the full transaction history of any TON address, including all incoming and outgoing transfers.
Check block information — see block height, the transactions included in each block, and validator activity.
Monitor network status — see current transaction throughput and fee levels on the TON network.

Practical uses: if someone tells you they sent you TON or USDT, you can verify it independently on Tonviewer without trusting their word. If you send funds and are unsure whether the transaction confirmed, the explorer shows you definitively. This verification capability — not needing to trust any intermediary — is one of the core properties that makes public blockchains valuable.

Try looking up your own Tonkeeper wallet address on Tonviewer to see your transaction history displayed on-chain.

Next installment of Education Hub: TON fees explained and Tonkeeper Battery.

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