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Immutable X: Boostrapping the gaming & NFT ecosystem on Layer-2

Key Terms

L2 and L3 (Rollups)L2 refers to blockchain scaling solutions that handle transactions off Ethereum L1, with settlement and data availability on L1. Rollups batch hundreds of transactions into a single transaction on L1. By posting validity proof to L1, rollups inherit the security of Ethereum. L3 is to L2 what L2 is to L1.
ZK-RollupsL2 smart contracts that verify transactions using cryptographic proofs that are computed off-chain and verified on L1, enabling very low transaction fees and high scalability. Note that although StarkEx and StarkNet are generally referred to as ZK-Rollups, they are not actually zero knowledge. The correct term is Validity-Rollup."