April 2017
Intermediate to advanced
266 pages
7h 4m
English
Content preview from Building Blockchain Projects
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Data sources
Here is a list of sources from which Oraclize lets smart contracts fetch data:
- URL: The URL data source provides you with the ability to make an HTTP GET or POST request, that is, fetch data from the WWW.
- WolframAlpha: The WolframAlpha data source provides you with the ability to submit a query to the WolframAlpha knowledge engine and get the answer.
- Blockchain: The blockchain data source provides you with ability to access data from other blockchains. Possible queries that can be submitted to the blockchain data source are bitcoin blockchain height, litecoin hashrate, bitcoin difficulty, 1NPFRDJuEdyqEn2nmLNaWMfojNksFjbL4S balance, and so on.
- IPFS: The IPFS data source provides you with the ability to fetch the content of a ...