January 2020
Intermediate to advanced
530 pages
11h 11m
English
Content preview from Blockchain Development for Finance Projects
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Building a function to compare the current hash signature of a file with the hash recorded in the blockchain
The bRead() function is called to compare the hash of a file in the monitored directory with the hash signature recorded previously in the blockchain. It takes the hash of the directory path of a file (p) and the current hash of the file (d) as input parameters:
- Let's take a look at the function. Like the pRead methods, we start bRead by defining our wallet object and gateway connection. We point the connection to the docsapp smart contract and mychannel network channel. We'll be using the user1, to submit our evaluation transaction:
async function bRead (p,d) { try { const wallet = new FileSystemWallet('/home/ishan/docsapp/wallet'); ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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