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Blockchains have been used primarily in finance, but their development for new uses has been hindered by problems of scale. Now, a technique called rollups could enable blockchains to be used in the Internet of Things and online marketplaces. This technique allows for the delocalisation of data and applications to make blockchain technology much lighter, paving the way for faster, more secure transactions. It can also be used to process data from Internet of Things devices that are integrated into a blockchain.