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Sending, receiving and reading a block explorer

Once you can read a block explorer, you stop needing anyone to tell you what happened to your money. This module covers both.

MODULE 5 OF 64 LEVEL 3: MARKETS, VENUES AND EXECUTION 12 MIN

An address is nothing like a bank account

It is a long string derived mathematically from your public key. There is no name attached, no bank behind it, no branch, and no way to recall a payment. It is closer to a numbered locker than an account.

Addresses look different on different chains, and the shape tells you which chain it belongs to.

Recognising an address
Bitcoin
bc1q... or 1... or 3...
Newer bc1 addresses are cheaper to send from. All three are valid Bitcoin addresses.
Ethereum and every EVM chain
0x followed by 40 characters
The same address works on Ethereum, Base, Arbitrum, Polygon, BNB Chain and dozens more. That is convenient and it is also how people send to the wrong chain.
Solana
A long mixed case string, no 0x
Completely different format. A Solana address will not work on Ethereum and the wallet should refuse it.
Cosmos chains
A prefix then numbers, like cosmos1... or osmo1...
The prefix names the chain, which makes mistakes here usually fail safely rather than lose funds.

The four ways transfers go wrong

Ranked by how often it happens
1. Wrong network
Usually recoverable
You sent USDC on Ethereum but chose BNB Chain in the withdrawal dropdown. Because EVM addresses are identical across chains, the funds arrived at your address on the wrong chain. Add that network to your wallet and they appear. You will need a little of that chain's gas coin to move them.
2. No gas coin
Annoying, not fatal
You hold tokens but none of the chain's native coin, so you cannot pay the fee to move anything. Send yourself a small amount of ETH, CRO, BNB or whichever applies.
3. Sent to an exchange on an unsupported chain
Often unrecoverable
Exchange deposit addresses only watch specific chains. Send on one they do not monitor and nothing credits. Open a support ticket immediately with the transaction hash. Sometimes they can recover it manually, sometimes not.
4. Sent to a contract address
Usually unrecoverable
Pasting a token contract address instead of a wallet address. The contract has no instruction to release them and nobody can retrieve them.
The habit that prevents all four: send a small test amount first, wait for it to arrive, then send the rest to the same verified address. It costs one extra fee and a few minutes.

Address poisoning, and why you must never copy from history

Attackers generate an address whose first four and last four characters match one you use, then send you a tiny worthless transaction so it appears in your history. Later you copy an address from that history, glance at the ends, and send to them.

Always copy the address from its source. Check characters in the middle, not just the ends. And never, ever copy from your own transaction list.

What confirmations actually mean

When you send, the transaction is broadcast to the network and sits in a waiting area called the mempool. A validator picks it up and includes it in a block. That is one confirmation. Every block built on top afterwards is another.

More confirmations means more difficult to undo. Exchanges wait for a set number before crediting you, which is why a deposit can be visible on the explorer and not yet in your account. That is normal, not a fault.

Reading a block explorer, step by step

A block explorer is a free website that shows everything on a blockchain. Etherscan for Ethereum, Blockstream or Mempool for Bitcoin, Solscan for Solana. Every chain has one. You do not log in, because there is nothing to log in to: it is all public.

  1. Copy your transaction hash, the long string your wallet shows after sending. It is the receipt number.
  2. Paste it into the explorer for that chain and press search.
  3. Look at Status first. Success means it worked. Pending means it is still waiting. Failed means it reverted and the gas was still taken.
  4. Check From and To and confirm the destination is what you intended.
  5. Check Value and, for tokens, the token transfer section further down, which is where token amounts appear rather than in the main value field.
  6. Check Confirmations to see how settled it is.
  7. If it failed, look for the revert reason, which usually names the actual problem in plain text.

You can also paste an address instead of a hash and see every transaction it has ever made, its current balances, and which tokens it holds. This is how you check whether funds arrived, verify a project's claims, or see whether a token's supply is concentrated in a few wallets.

Everything on a blockchain is public forever. Anyone with your address can see your entire history and balance. This is worth knowing before you post an address publicly or give one to someone you would rather not share your finances with.
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BEFORE YOU MOVE ON

Common questions

Why is my deposit not showing on the exchange?

Usually it needs more confirmations. Look the transaction up on the block explorer. If it shows as confirmed and the exchange still has not credited it after their stated number of confirmations, open a ticket with the transaction hash.

Can I cancel a crypto transaction?

Once confirmed, no. While still pending you can often replace it with a higher fee version, which is what Speed Up and Cancel do in most wallets.

What is a block explorer?

A free public website showing every transaction, address and balance on a blockchain. Etherscan for Ethereum, Solscan for Solana. No account needed, because the data is public by design.

Can people see my crypto balance?

Yes. Anyone with your address can see your full balance and transaction history forever. Blockchains are public records, not private accounts.

Risk warning: crypto is highly volatile and largely unregulated. You can lose everything you put in. Nothing here is financial, investment or tax advice.

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