Learn Crypto

Structured education across every format and skill level · 382 guides

📝Article

DeFi

4 min read

Insufficient Liquidity for This Trade: What It Means and What to Do

Insufficient liquidity for this trade, explained: why a pool cannot fill your swap, what to check first, and the safe ways around it.

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📝Article

DeFi

4 min read

"Transaction Is Expected to Fail" — What That Error Message Means

What "this transaction is expected to fail" means in MetaMask: your wallet rehearsed the transaction, it was rejected, and here is how to fix it.

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📝Article

DeFi

4 min read

How to Fix "Swap Failed" on Uniswap

How to fix a swap failed error on Uniswap: the checks in order, from slippage and gas to approvals and tokens that cannot be sold.

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📝Article

DeFi

4 min read

Why Did My Transaction Fail?

Why a crypto transaction fails: reverted, out of gas or stuck pending. How to read the block explorer and why the fee is still charged.

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📝Article

DeFi

4 min read

Why Did My Swap Fail?

Why a crypto swap fails: slippage, gas, approvals and liquidity explained simply, plus what happens to your tokens and your fee.

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📝Article

Basics

4 min read

Add a Payment Method: Troubleshooting Cards and Bank Accounts

Add a payment method troubleshooting: why a card or bank account will not link to a crypto app, and the fixes that actually work.

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📝Article

Basics

4 min read

Why Did My Crypto Purchase Not Go Through, or Why Is It Still Pending?

A crypto purchase that did not go through and one that is still pending are different problems. How to tell them apart and what fixes each.

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📝Article

Basics

4 min read

What Should I Do if My MoonPay Purchase Fails or Is Declined?

What to do if your MoonPay purchase fails or is declined: the steps in order, what happens to a pending hold, and when your money comes back.

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📝Article

Basics

4 min read

Why Did My Debit Card Get Declined Buying Crypto?

Why did my debit card get declined buying crypto? Online payment caps, pending holds, mismatched billing details and the cards that never work.

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📝Article

Basics

4 min read

Why Was My Crypto Payment Declined?

Why was my crypto payment declined? The three checkpoints every payment passes, how to tell which one stopped yours, and what each one needs.

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📝Article

Basics

4 min read

Why Does My Card Not Work to Buy Crypto?

Why does my card not work to buy crypto? How banks code crypto as quasi-cash, the difference between a policy block and a fraud flag, and what works.

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📝Article

Basics

4 min read

Crypto Card Declined: Reasons and Fixes

Crypto card declined? The reasons it happens, ranked by how common they are, with the fix for each one and what happens to your money.

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