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metamask-extension/app/scripts/lib/createMethodMiddleware.js
Mark Stacey f77151003e
Send web3 usage metrics once per origin/property (#9237)
The usage metrics for the injected web3 instance were being sent upon
each use, which exceeded the limits of our Matomo plan. These metrics
are now only being sent upon the first usage, for each origin and
property.
2020-08-14 19:15:21 -03:00

43 lines
1.1 KiB
JavaScript

const recordedWeb3Usage = {}
/**
* Returns a middleware that implements the following RPC methods:
* - metamask_logInjectedWeb3Usage
*
* @param {Object} opts - The middleware options
* @param {string} opts.origin - The origin for the middleware stack
* @param {Function} opts.sendMetrics - A function for sending a metrics event
* @returns {(req: any, res: any, next: Function, end: Function) => void}
*/
export default function createMethodMiddleware ({ origin, sendMetrics }) {
return function methodMiddleware (req, res, next, end) {
switch (req.method) {
case 'metamask_logInjectedWeb3Usage': {
const { action, name } = req.params[0]
if (!recordedWeb3Usage[origin]) {
recordedWeb3Usage[origin] = {}
}
if (!recordedWeb3Usage[origin][name]) {
recordedWeb3Usage[origin][name] = true
sendMetrics({
action,
name,
customVariables: { origin },
})
}
res.result = true
break
}
default:
return next()
}
return end()
}
}