Blockchain
A shared, append-only record of transactions maintained by many independent computers at once.
✦ Key Insight
It is why you can verify a payment yourself instead of trusting a statement, and why nobody can quietly reverse a transaction after the fact.
✕ Common Misconceptions
Believing "on a blockchain" means safe or audited. The ledger guarantees the record, not the honesty of the project writing to it.
Detailed Explanation
In Practice
Dig Deeper
Wallet
Software or hardware that stores your private keys and lets you sign transactions.
Token
An asset created by a smart contract on an existing blockchain rather than being that blockchain's native currency.
Blockchain
A shared, append-only record of transactions maintained by many independent computers at once.
Transaction
A blockchain transaction is a signed or authorized instruction that changes blockchain state or transfers value when accepted by the network.