// Help center

Learn once. Transact with confidence.

Everything you need to use our apps safely: from what a testnet is to how to fill in every field of every form.

Testnet vs Mainnet
Free test ETH
Verify a contract
App guides
Security tips

// 01

Testnet vs Mainnet: rehearsal and opening night.

Before using real money, run the same operation on Sepolia. It's free, it's identical and it will save you costly mistakes.

Test network

Testnet · Sepolia

Free: Test coins have no real value.
Risk-free: Perfect for learning and making mistakes.
Identical: Works exactly like the real network.
Faucets: Get free test ETH in minutes.

Main network

Mainnet · Ethereum / Polygon

Real: Transactions carry real economic value.
Costs gas: You need ETH or POL to pay network fees.
Irreversible: Once confirmed, there's no going back.
Production: For real, commercial, final use.

1
Test on Sepolia
Run the operation with test coins.
2
Check the result
Confirm on the block explorer that everything is as expected.
3
Repeat on Mainnet
Knowing exactly what is going to happen.

// What is a faucet?

Get Sepolia ETH for free

A faucet is a service that hands out small amounts of test coins to use on testnets. Connect your MetaMask, follow the instructions and you'll receive about 0.05 Sepolia ETH: enough for plenty of test transactions.

Open the Google Cloud faucet

// 02 · Transparency

Trust, but verify.

A serious platform publishes its contract code. If you can't read it, you don't know what it does with your tokens. Here's how to check in five steps:

01
Find the contract address
Paste it into the Etherscan.io search bar (or Polygonscan for Polygon).
02
Open the “Contract” tab
It should show the green ✓ “Verified” check.
03
Review the source code
Under “Contract Source Code” you can read exactly what it does.
04
Look for sensitive functions
mint, burn, pause, blacklist… and who can call them.
05
Check the standard
It should follow ERC-20 (tokens) or ERC-721 (NFTs).

Go to Etherscan

// 03 · App guides

Field by field, no guesswork.

Expand the app you're about to use and follow the steps.

Create a TokenYour own ERC-20 token, deployed in minutes, without writing code.

1
Token name
The full name wallets and explorers will display.
Tip E.g. “Aurora Project Coin”.
2
Symbol
A 3–5 character ticker, like BTC or ETH.
Tip Check on Etherscan that it can't be confused with a well-known token.
3
Total supply
The total number of tokens that will ever exist.
Tip E.g. 1000000 for one million. You can't mint more after deployment.
4
Decimals
How finely each token can be divided.
Tip Keep 18: it's the standard wallets and exchanges expect.
5
Network
Sepolia for testing; Ethereum or Polygon for production.
Tip Always run a full test on Sepolia first.

When it's done you'll get the contract address. Share it so others can add your token to their wallet, and check it on Etherscan for the “Verified” badge.

Open Create a Token

Free NFT MintingTurn your work into an NFT and pay only the network gas.

1
File
The image, video or audio that will become your NFT.
Tip Formats: JPG, PNG, GIF, MP4 and MP3. Recommended: under 100 MB.
2
Name
The title of the work, shown on marketplaces.
Tip E.g. “Sunrise over the Sierra #1”.
3
Description
The story of the work: technique, inspiration, edition.
Tip A good description builds buyer confidence.
4
Traits (optional)
Attributes such as color, rarity or style.
Tip Very useful if you're building a collection.
5
Royalties
The percentage you earn on every resale.
Tip Typically between 2.5% and 10%.
6
Network
Ethereum for maximum compatibility; Polygon for minimal gas.
Tip Try Sepolia first if it's your first NFT.

Your NFT will appear in your wallet as a standard ERC-721 and you can list it on any compatible marketplace.

Open Free NFT Minting

File CertificationTamper-proof evidence that a file existed, and who owned it, on a given date.

1
File
Select the document you want to certify.
Tip Any format works: PDF, image, audio, video…
2
Title
A descriptive name for the certificate.
Tip E.g. “Lease agreement – Unit 4B – 2026”.
3
Description
Context for the file: author, date, license.
Tip The more precise, the more useful as evidence.
4
Network
Sepolia to test; Ethereum for the definitive certificate.
Tip Only certification on Ethereum counts as a real record.

You'll receive a unique hash proving the file existed on that date. Keep the original file untouched: it's what allows the match to be checked.

Open File Certification

Bulk SenderPay hundreds of addresses in a single transaction and save up to 80% on gas.

1
Token address
The contract of the token you're sending.
Tip Copy it from Etherscan or CoinGecko; never type it by hand.
2
Recipients
One line per recipient: address,amount.
Tip E.g. 0x12…ab,100 · 0x56…ef,250
3
Network
The network the token lives on.
Tip A Polygon token can only be sent on Polygon.
4
Review
Check the summary before signing.
Tip Make sure the total matches what you expect to send.

All transfers are batched into a single transaction. Make sure you hold enough of the token and of the gas currency (ETH or POL).

Open Bulk Sender

AirdropsDistribute tokens to your community with clear rules and zero manual work.

1
Token to distribute
The contract of the token you're giving away.
Tip It must be in your wallet, in sufficient quantity.
2
Recipients
The addresses that will receive tokens.
Tip Upload a CSV or paste them, one per line.
3
Amount per user
Same for everyone or custom per address.
Tip Work out the total before launching.
4
Criteria
Conditions each recipient must meet.
Tip E.g. holding a specific NFT or another token.
5
Date
Immediate or scheduled distribution.
Tip Announce it to your community in advance.

The platform checks the criteria before distributing and includes anti-sybil measures to stop one person from joining with multiple accounts.

Open Airdrops

NFT ViewerLook inside any wallet and truly understand the NFTs it holds.

1
Wallet address
The public address or .eth name to analyze.
Tip Read-only: no need to connect your wallet.
2
Network
The network to search for NFTs.
Tip Most popular collections live on Ethereum.
3
Filter (optional)
Limit the search to one collection.
Tip Leave it empty to see everything.

You'll see every NFT with its metadata, traits and contract information, plus links to the marketplaces where it trades.

Open NFT Viewer

Wallet MailA crypto wallet you open with your email. No seed phrase to lose.

1
Email or phone
Enter the email or number you want to sign in with.
Tip Use an email account protected with two-factor authentication.
2
Magic Link
Open the link or code you receive to sign in.
Tip Never forward that link to anyone.
3
Your wallet
Check your address and balances.
Tip For large amounts, consider moving funds to MetaMask or a hardware wallet.

Wallet Mail is ideal to get started and for everyday amounts. To hold significant sums, we recommend a self-custody wallet such as MetaMask.

Open Wallet Mail

Address ReportsIn developmentThe full history of any Ethereum address, in one clear report.

In development. It will provide risk analysis, transaction patterns, held tokens and NFTs, and DeFi interactions.

// 04 · Security

Six habits that keep you safe.

Copy and paste addresses
Never type them by hand, and check the first and last characters.
Test on Sepolia first
Rehearse any important operation before doing it for real.
Use verified contracts
If the code isn't public, don't interact with it.
Guard your seed phrase
No legitimate service will ever ask for it. Not even us.
Review before signing
Read what your wallet shows: amount, network and destination.
Keep gas in reserve
Always hold some ETH or POL to pay network fees.

Still have questions? Talk to our team.