Private Oracle for Off-Chain Data Snapshot
Overview
Our private Oracle utilizes the C++ programming language to interface with SQL databases and Ethereum-based smart contracts. This document offers an overview of the process and includes some basic code examples.
Connecting to a SQL Database
C++ enables database connectivity through various libraries such as ODBC, MySQL Connector/C++, etc. Let's take an example of connecting to a MySQL database.
Connecting to a SQL Database
C++ enables database connectivity through various libraries such as ODBC, MySQL Connector/C++ etc. Let's take an example of connecting to a MySQL database.
Extracting Data From SQL Database
Once connected, we can extract data using SQL queries. The ResultSet object stores the data returned by the queries.
Pushing Data To Ethereum Blockchain
To interface with the Ethereum blockchain, we'll use the web3.cpp library. We first establish a connection to an Ethereum node and then call a function in our smart contract to update the data.
The 'updateProperty' function should exist in your smart contract and have the logic to update the state of the contract.
This example provides a basic approach to fetching data from an SQL database and pushing that data onto the Ethereum blockchain. It's crucial to consider factors such as security, error handling, scalability, and regulatory compliance while developing a production-grade oracle. It's also essential to use a private key management solution to sign transactions securely.
Conclusion
We believe this documentation gives an insightful look into how our Private Oracle interfaces with off-chain data sources, and Ethereum smart contracts. For further details or discussions, please reach out to us.
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