The following is my encapsulation of the methods I use daily in Web3Swift
//================================================华丽丽的分割线===========================================
//MARK:生成Data
func gettingData(address: String, money: Int, pownum: Int) -> String {
let jsonString = SymbolABIStr
do {
let jsonData = jsonString.data(using: .utf8)
let abi = try JSONDecoder().decode([ABIv2.Record].self, from: jsonData!)
let abiNative = try abi.map({ (record) -> ABIv2.Element in
return try record.parse()
})
let method = abiNative.filter({ (element) -> Bool in
switch element {
case .function(let function):
return function.name == "transfer"
default:
return false
}
})
let amount = BigUInt(10).power(pownum).multiplied(by: BigUInt(money))
let parameters = [address, amount] as [AnyObject]
let result = method[0].encodeParameters(parameters)
print(abiNative)
let hex: String = result!.toHexString()
if hex.count > 0 {
return "0x" + hex
}
return ""
} catch {
print(error)
return ""
}
}
//================================================华丽丽的分割线=================================================
//MARK:获取代币余额（弃用,获取太慢）
func gettingBalanceOfSymbol (symbolAddr: String, walletAddr: String) -> Double {
let jsonString = SymbolABIStr
// let web3Main = Web3.InfuraMainnetWeb3()
let url = URL(string: "https://ropsten.infura.io/")!
let web3Main = Web3.new(url)!
let coldWalletAddress = EthereumAddress(walletAddr) //from
let constractAddress = EthereumAddress(symbolAddr) //to
var options = Web3Options.defaultOptions()
options.from = coldWalletAddress
let contract = web3Main.contract(jsonString, at: constractAddress, abiVersion: 2)!
guard let bkxBalanceResult = contract.method("balanceOf", parameters: [coldWalletAddress] as [AnyObject], options: options)?.call(options: nil) else {return 0}
guard case .success(let bkxBalance) = bkxBalanceResult, let bal = bkxBalance["0"] as? BigUInt else {return 0}
print("token balance = " + String(bal))
if !bkxBalance.isEmpty {
return Double(bal)
} else {
return 0
}
}
//================================================华丽丽的分割线=================================================
//MARK:读取授权额度
func gettingAuthorizationLimit(symbolAddr: String, userAddr: String) -> String {
let jsonString = SymbolAuthorizationABIStr
// let web3Main = Web3.InfuraMainnetWeb3()
let url = URL(string: "https://ropsten.infura.io/")!
let web3Main = Web3.new(url)!
let constractAddress = EthereumAddress(symbolAddr) //to
var options = Web3Options.defaultOptions()
options.to = constractAddress
let contract = web3Main.contract(jsonString, at: constractAddress, abiVersion: 2)!
let spender = "0x717d85f910953940cb480b567b4841cfe9650a1b"
let parameters = [userAddr, spender] as [AnyObject]
guard let bkxBalanceResult = contract.method("allowance", parameters: parameters, options: options)?.call(options: nil) else {return "0"}
guard case .success(let bkxBalance) = bkxBalanceResult, let bal = bkxBalance["0"] as? BigUInt else {return "0"}
print("token allowance = " + String(bal))
if !bkxBalance.isEmpty {
return String(bal)
} else {
return "0"
}
}
//================================================华丽丽的分割线=================================================
//MARK:确认授权生成data
func confirmAuthorization(symbolAddr: String, money: Double, pownum: Int) -> String {
let jsonString = SymbolAuthorizationABIStr
do {
let jsonData = jsonString.data(using: .utf8)
let abi = try JSONDecoder().decode([ABIv2.Record].self, from: jsonData!)
let abiNative = try abi.map({ (record) -> ABIv2.Element in
return try record.parse()
})
let method = abiNative.filter({ (element) -> Bool in
switch element {
case .function(let function):
return function.name == "approve"
default:
return false
}
})
let spender = "0x717d85f910953940cb480b567b4841cfe9650a1b"
let value = BigUInt(10).power(pownum).multiplied(by: BigUInt(money))
let parameters = [spender, value] as [AnyObject]
let result = method[0].encodeParameters(parameters)
print(abiNative)
let hex: String = result!.toHexString()
if hex.count > 0 {
return "0x" + hex
}
return ""
} catch {
print(error)
return ""
}
}
//================================================华丽丽的分割线=================================================
//MARK:挂单买入代币事件生成data
func makeBuyOffer(symbolAddr: NSString, number: String, price: String) -> String {
let jsonString = SymbolABIBBTransaction
do {
let jsonData = jsonString.data(using: .utf8)
let abi = try JSONDecoder().decode([ABIv2.Record].self, from: jsonData!)
let abiNative = try abi.map({ (record) -> ABIv2.Element in
return try record.parse()
})
let method = abiNative.filter({ (element) -> Bool in
switch element {
case .function(let function):
return function.name == "makeBuyOffer"
default:
return false
}
})
let nullArray: Array = [Any]()
// let parameters = [symbolAddr, BigUInt(number)!, BigUInt(price)!, nullArray] as [AnyObject]
let parameters = [symbolAddr, number, price, nullArray] as [AnyObject]
let result = method[0].encodeParameters(parameters)
print(abiNative)
let hex: String = result!.toHexString()
if hex.count > 0 {
return "0x" + hex
}
return ""
} catch {
print(error)
return ""
}
}
//================================================华丽丽的分割线=================================================
//MARK:挂单卖出代币事件生成data
func makeSellOffer(symbolAddr: NSString, number: String, price: String) -> String {
let jsonString = SymbolABIBBTransaction
do {
let jsonData = jsonString.data(using: .utf8)
let abi = try JSONDecoder().decode([ABIv2.Record].self, from: jsonData!)
let abiNative = try abi.map({ (record) -> ABIv2.Element in
return try record.parse()
})
let method = abiNative.filter({ (element) -> Bool in
switch element {
case .function(let function):
return function.name == "makeSellOffer"
default:
return false
}
})
let nullArray: Array = [Any]()
let parameters = [symbolAddr, number, price, nullArray] as [AnyObject]
let result = method[0].encodeParameters(parameters)
print(abiNative)
let hex: String = result!.toHexString()
if hex.count > 0 {
return "0x" + hex
}
return ""
} catch {
print(error)
return ""
}
}
//================================================华丽丽的分割线=================================================
//MARK:挂单撤回事件生成data
func withdrawOrder(iid: Int) -> String {
let jsonString = SymbolABIBBTransaction
do {
let jsonData = jsonString.data(using: .utf8)
let abi = try JSONDecoder().decode([ABIv2.Record].self, from: jsonData!)
let abiNative = try abi.map({ (record) -> ABIv2.Element in
return try record.parse()
})
let method = abiNative.filter({ (element) -> Bool in
switch element {
case .function(let function):
return function.name == "cancelOffer"
default:
return false
}
})
let parameters = [iid] as [AnyObject]
let result = method[0].encodeParameters(parameters)
print(abiNative)
let hex: String = result!.toHexString()
if hex.count > 0 {
return "0x" + hex
}
return ""
} catch {
print(error)
return ""
}
}