WORD OF THE DAYBlockchain
BeginnerA shared ledger whose blocks are linked by cryptographic hashes.
Crypto Dictionary word feed
Daily pick
Added to the dictionary
Advanced
A Solana system variable that exposes cluster information to programs.
IN THE WILD
A program reads the Clock sysvar before deciding whether a time-limited action is still allowed.
Daily pick
Beginner
A peer-to-peer monetary network whose native asset is bitcoin, usually written as BTC.
Added to the dictionary
Intermediate
The authority allowed to freeze or thaw token accounts for a Solana mint.
IN THE WILD
An issuer freezes a token account, and its owner can still see the balance but cannot transfer it normally.
Intermediate
Removing unneeded historical state data from a node's local storage while preserving the state it needs to operate.
Daily pick
Beginner
Bitcoin’s scheduled halving of the block subsidy every 210,000 blocks.
Daily pick
Intermediate
Staking through a system that issues a transferable token representing a staking position or claim.
IN THE WILD
"My ETH is still staked, but I can transfer the liquid staking token representing that position."
Daily pick
Intermediate
Signing a transaction or message without meaningfully seeing or understanding what it authorizes.
IN THE WILD
"The wallet shows a wall of hex. I can click Sign, but I still can't tell what I'm authorizing."
Daily pick
Intermediate
Permission for a specified spender to move tokens under the token contract's rules.
IN THE WILD
"I approved the swap contract for 50 tokens. Why hasn't anything swapped? Approval was the permission step."
Added to the dictionary
Advanced
A compact zero-knowledge proof construction often used to prove that hidden transaction amounts lie within valid ranges.
IN THE WILD
A confidential transaction proves its hidden output amount is in range without publishing that amount.