October 2020
Intermediate to advanced
352 pages
9h 51m
English
Content preview from Blockchain in Action
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6 On-chain and off-chain data
This chapter covers
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Exploring different kinds of on-chain data: blocks, transactions, receipts, and state
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Defining, emitting, and logging events
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Accessing event logs from transaction receipts to support Dapp operations
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Designing and developing Dapps with on-chain and off-chain data
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Demonstrating on-chain and off-chain data using ASK and blind auction Dapps
This is it. This is what distinguishes blockchain application development from that of non-blockchain applications: on-chain data. Do you wonder where the data associated with a Dapp is stored? Some are stored on the blockchain infrastructure (on-chain), and others in traditional databases and files (off-chain). In this chapter, you’ll learn first ...
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