Secret key material used to create signatures or perform other private-key operations in a public-key system.
Your wallet broadcasts the transfer signature, not the private key it used to create that signature.
A consensus approach that uses committed assets to help select validators and hold them accountable.
A mechanism that requires computational work to qualify a candidate block for acceptance.
A miner finds a header hash that meets the target, then broadcasts the block for nodes to check.
A contract that forwards calls to implementation code while retaining its own address and storage.
The protocol announces an implementation upgrade; your position still sits at the same proxy address, but the logic handling it has changed.
Partially Signed Bitcoin Transaction: a format for passing transaction data between wallets and signing devices.
You prepare a PSBT on your computer, sign it on an offline device, then return the signed data to the computer for broadcasting.
The shareable part of a public-key pair, used to verify signatures or perform certain encryption operations.
Nodes use the public key to check your signature; they do not need your private key to verify it.
A pattern where an external call re-enters a contract before an earlier operation has finished.
The withdrawal callback calls back into withdrawal before the first call updates the balance; that second call sees the old accounting.
A relay-policy mechanism for replacing an eligible pending transaction with a higher-fee transaction.
'My transfer's taking ages.' You use your wallet's fee-bump option to submit an eligible replacement while the payment is still pending.
Reusing a valid authorization where it should no longer apply or should never have applied.
"This authorization already ran once. Without recording its consumed nonce, the system accepts the same signature again."
An execution failure that rolls back changes made by the affected contract call.
“My swap failed and I still paid gas.” The minimum-output check triggered a revert after the network had already done execution work.