PromiseKit example

[matijakregar]

Could you please provide an example of how to use the async functions.
For example web3.eth.getGasPricePromise().then { ???? }

Whatever I do with what comes from autocomplete gives a build-time error.

Thanks!

[shamatar]

There is a good example in code

self.assemblePromise(options: options, onBlock: onBlock).then(on: queue) { transaction throws -> Promise<TransactionSendingResult> in
            guard let mergedOptions = Web3Options.merge(self.options, with: options) else {
                throw Web3Error.inputError(desc: "Provided options are invalid")
            }
            var cleanedOptions = Web3Options()
            cleanedOptions.from = mergedOptions.from
            cleanedOptions.to = mergedOptions.to
            return self.web3.eth.sendTransactionPromise(transaction, options: cleanedOptions, password: password)
        }

If you call then - your internal closure should return a Promise
If you call map - you can return a normal value that will be wrapped into the Promise for further chaining

[skywinder]

Thanks, @shamatar !
It really could be tricky for those, who didn't work with promises before.

@BaldyAsh @FesenkoG could you please add this example to readme?