Crypto 5

How to generate Polygon wallet account in Swift

Issue #871

Use libraries

• https://github.com/argentlabs/web3.swift
• https://github.com/bswags/web3keystore

import web3
import web3keystore
import KeychainAccess

private final class KeyStorage: EthereumKeyStorageProtocol {
    enum Key: String { …

Written by

Khoa Pham

How to learn Polygon programming

Issue #870

Building

• https://dev.to/dabit3/building-scalable-full-stack-apps-on-ethereum-with-polygon-2cfb

Sidechain

• https://docs.polygon.technology/docs/home/new-to-polygon
• https://hackernoon.com/what-are-sidechains-and-childchains-7202cc9e5994 …

Written by

Khoa Pham

How to send SPL token in Swift

Issue #867

Using https://github.com/ajamaica/Solana.Swift and the sendSPLToken method. Note that the from is the token account address and amount can have decimals

solana.action.sendSPLTokens(
    mintAddress: MINT_ADDRESS,
    from: …

Written by

Khoa Pham

How to calculate Solana transaction fee

Issue #866

A simple way is to use a fixed fee of 0.000005

For example from https://solscan.io/tx/5DkApvwTYuMqCiA94MhUVKJoLn8MGma9gAWXhreRJKqAs395P5CqEK3R84m3MWjcTKMem53XcLwYErGkaJAbQC2h?cluster=testnet

And call some exchange API, like Coingecko …

Written by

Khoa Pham

How to check SPL token balance on Solana

Issue #863

We will check USDC token balance on Solana testnet.

Firstly, we will use https://usdcfaucet.com/ to airdrop some USDC tokens into our wallet. Secondly, we check USDC token mint address on testnet cluster using Solana Explorer …

Written by

Khoa Pham