The Account Abstraction Layer (AAL) is the technical infrastructure that makes smart contract development possible on the Qtum blockchain. The foundational layer of Qtum follows the UTXO model used on blockchains such as Bitcoin. The AAL on Qtum allows the accounts model used on Ethereum to be "abstracted" or transferred in order to work on top of the UTXO model. Qtum's AAL is the computing go-between that allows the UTXO and accounts models to interact.
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