Implement deep links for xDAI Fiat-on-Ramp on Ramp.network

[AW-STJ]

We would like to show a Buy xDAI button and then direct the users to Ramp.network's xDAI purchasing option.

All the relevant technical documents would be on their site https://docs.ramp.network/. Let me know if you need more information.

The scope of this work would be to

1. Add the 'Buy xDAI' option to xDAI token's the kebab menu
2. Take users to xDAI purchase site on Ramp.Network, on clicking this option.

[colourfreak]

From Paulina (Ramp.Network)

If you want to set up deep linking, you have to integrate in hosted mode https://docs.ramp.network/quick-start-hosted and set parameter swapAsset=xDai

[AW-STJ]

Also linking the iOS issue https://github.com/AlphaWallet/alpha-wallet-ios/issues/2507

[hboon]

James, here's the URL:

    private static let rampApiKey = "j5wr7oqktym7z69yyf84bb8a6cqb7qfu5ynmeyvn"
    static let buyXDaiWitRampUrl = "https://buy.ramp.network/?hostApiKey=\(rampApiKey)&hostLogoUrl=https%3A%2F%2Falphawallet.com%2Fwp-content%2Fthemes%2Falphawallet%2Fimg%2Falphawallet-logo.svg&hostAppName=AlphaWallet&swapAsset=xDai"

And append &userAddress=WALLET_ADDRESS

[JamesSmartCell]

@justindg can you let me know if you're starting on this? Next release will be in another 2 weeks, hopefully it can go into that.

[justindg]

@justindg can you let me know if you're starting on this? Next release will be in another 2 weeks, hopefully it can go into that.

@JamesSmartCell Working on it now 👍

cc @AW-STJ

[AW-STJ]

Let us extend the functionality to all the available tokens.

https://github.com/AlphaWallet/alpha-wallet-android/issues/1738