January 2020
Intermediate to advanced
530 pages
11h 11m
English
Content preview from Blockchain Development for Finance Projects
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Displaying the orderbook
The setOrderbook method, as the name suggests, pulls and relays the information that is required to display the orderbook to the user. It does so by invoking the viewBuy() and viewSell() methods on our orderbook smart contract, and populating the buys[] and sells[] arrays in the app state:
- We start writing the method by initializing a new contract instance that points to our Orderbook smart contract:
setOrderbook = () => { let app = this; var lastBuy; var lastSell; var contract = new this.watchweb3.eth.Contract(this.OrderbookABI.abi,this.OrderbookABI.address);
- We will first populate the buy orders in the buys[] array, and then the sell orders in the sells[] array.
- We first call our smart contract viewLengthBuy ...
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