Transactions or data stored outside the main blockchain. Off-chain solutions reduce fees and increase speed by handling things elsewhere, then settling periodically on-chain. Layer 2s and sidechains are off-chain scaling approaches.
Transactions and data recorded directly on the blockchain.
A secondary network built on top of a Layer 1 to improve scalability.
A blockchain's ability to handle increasing transaction volume without degrading performance or raising fees.
Application Binary Interface.
A way to make crypto wallets behave more like normal apps by turning every account into a smart contract.
The Ethereum standard for account abstraction without changing the core protocol.
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