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5 changed files with 109 additions and 147 deletions
8
config.yml
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8
config.yml
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@ -0,0 +1,8 @@
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name: crypto_ex
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build:
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include:
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- .
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- !exclude:
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- vendor/**
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permissions:
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- methods: '*'
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196
contract.go
196
contract.go
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@ -1,28 +1,99 @@
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//go:build !exclude_crypto_ecdsa
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package crypto_ex
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package main
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import (
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"encoding/json"
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"fmt"
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"github.com/go-resty/resty/v2"
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"github.com/nspcc-dev/neo-go/pkg/interop"
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"github.com/nspcc-dev/neo-go/pkg/interop/native/gas"
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"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
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"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
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"github.com/nspcc-dev/neo-go/pkg/interop/storage"
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"strconv"
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)
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type Wallet struct {
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Tokens map[string]int
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}
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type TickerPrice struct {
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Symbol string `json:"symbol"`
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Price string `json:"price"`
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func (w Wallet) getTokenBalance(token string) int {
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value := getValueFromStringIntMap(w.Tokens, token)
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if value == nil {
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return 0
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}
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return value.(int)
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}
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func GetWallet(address interop.Hash160) Wallet {
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var prices map[string]int
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// All prices are multiplied by 1e10 and rounded to be represented as fixed point int
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func init() {
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prices = map[string]int{
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"XMR": 1521000000000,
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"XRP": 6035000000,
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"ADA": 5793000000,
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"AVAX": 396900000000,
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"BNB": 3083000000000,
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"BTC": 466489200000000,
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"ETH": 26230000000000,
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"SOL": 1011800000000,
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}
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}
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func TopUp(address interop.Hash160, token string, amount int) bool {
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if !isKnownToken(token) {
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runtime.Log("Token " + token + " is unkown")
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return false
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}
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wallet := getWallet(address)
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balance := wallet.getTokenBalance(token)
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wallet.Tokens[token] = balance + amount
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saveWallet(address, wallet)
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return true
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}
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func GetTokenBalance(address interop.Hash160, token string) int {
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return getWallet(address).getTokenBalance(token)
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}
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func Exchange(address interop.Hash160, amount int, fromToken string, toToken string) bool {
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if amount <= 0 {
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runtime.Log("Invalid amount")
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return false
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}
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wallet := getWallet(address)
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fromBalance := wallet.getTokenBalance(fromToken)
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if fromBalance < amount {
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runtime.Log("Not enough funds to exchange")
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return false
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}
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fromTokenPrice := getPrice(fromToken)
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toTokenPrice := getPrice(toToken)
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convertedAmount := amount * fromTokenPrice / toTokenPrice
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wallet.Tokens[fromToken] -= amount
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wallet.Tokens[toToken] = wallet.getTokenBalance(toToken) + convertedAmount
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saveWallet(address, wallet)
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runtime.Log("Exchange successful: " + std.Itoa10(amount) + " " + fromToken +
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" exchanged for " + std.Itoa10(convertedAmount) + " " + toToken)
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return true
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}
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func PrintWallet(address interop.Hash160) {
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wallet := getWallet(address)
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runtime.Log("Wallet " + ":")
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for key, value := range wallet.Tokens {
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runtime.Log(key + ":" + std.Itoa10(value))
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}
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}
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func getWallet(address interop.Hash160) Wallet {
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ctx := storage.GetContext()
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walletBytes := storage.Get(ctx, address)
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if walletBytes == nil {
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@ -31,107 +102,36 @@ func GetWallet(address interop.Hash160) Wallet {
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}
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}
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var wallet Wallet
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walletBytesAsBytes, _ := walletBytes.([]byte)
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err := json.Unmarshal(walletBytesAsBytes, &wallet)
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if err != nil {
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walletBytesAsBytes := walletBytes.([]byte)
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deserialized := std.Deserialize(walletBytesAsBytes)
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if deserialized == nil {
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return Wallet{}
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}
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return wallet
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return deserialized.(Wallet)
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}
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func UpdateWallet(address interop.Hash160, wallet Wallet) {
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func saveWallet(address interop.Hash160, wallet Wallet) {
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ctx := storage.GetContext()
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serialized, _ := json.Marshal(wallet)
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serialized := std.Serialize(wallet)
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storage.Put(ctx, address, serialized)
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}
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func GetBalance(address interop.Hash160, token string) int {
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wallet := GetWallet(address)
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return wallet.Tokens[token]
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func getPrice(token string) int {
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if !isKnownToken(token) {
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panic("trying to get price for unknown token")
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}
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return prices[token]
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}
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func RequestExchangeRate(fromToken string, toToken string) float64 {
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originalString := "https://api.binance.com/api/v3/ticker/price?symbol=%sUSDT"
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func getValueFromStringIntMap(mp map[string]int, key string) any {
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defer func() {
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recover()
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}()
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urlFrom := fmt.Sprintf(originalString, fromToken)
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urlTo := fmt.Sprintf(originalString, toToken)
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client := resty.New()
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responseFrom, errFrom := client.R().Get(urlFrom)
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responseTo, errTo := client.R().Get(urlTo)
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if errFrom != nil || errTo != nil {
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fmt.Println("Error during doing response")
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return 0
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return mp[key]
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}
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var tickerPriceFrom TickerPrice
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var tickerPriceTo TickerPrice
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errFrom = json.Unmarshal(responseFrom.Body(), &tickerPriceFrom)
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errTo = json.Unmarshal(responseTo.Body(), &tickerPriceTo)
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if errFrom != nil || errTo != nil {
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fmt.Println("Error during unpacking JSON")
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return 0
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}
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priceFrom, _ := strconv.ParseFloat(tickerPriceFrom.Price, 64)
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priceTo, _ := strconv.ParseFloat(tickerPriceTo.Price, 64)
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result := priceFrom / priceTo
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return result
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}
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func Transfer(address interop.Hash160, amount int, fromToken string, toToken string) bool {
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if amount <= 0 {
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runtime.Log("Invalid amount")
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return false
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}
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balance := gas.BalanceOf(address)
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if balance < amount {
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runtime.Log("Low gas balance for transaction")
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return false
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}
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contractHash := runtime.GetExecutingScriptHash()
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result := gas.Transfer(address, contractHash, amount, nil)
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if !result {
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runtime.Log("Transfer operation failed")
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return false
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}
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wallet := GetWallet(address)
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if GetBalance(address, fromToken) < amount {
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runtime.Log("Not enough funds to exchange")
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return false
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}
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exchangeRate := RequestExchangeRate(fromToken, toToken)
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if exchangeRate == 0 {
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return false
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}
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convertedAmount := float64(amount) * exchangeRate
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wallet.Tokens[fromToken] -= amount
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wallet.Tokens[toToken] += int(convertedAmount)
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UpdateWallet(address, wallet)
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runtime.Log("Exchange successful: " + strconv.Itoa(amount) + " " + fromToken +
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" exchanged for " + strconv.Itoa(int(convertedAmount)) + " " + toToken)
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return true
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}
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func printBalance(address interop.Hash160) bool {
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wallet := GetWallet(address)
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fmt.Println("Balance: ")
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for key, value := range wallet.Tokens {
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fmt.Println(key + ":" + strconv.Itoa(value))
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}
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return true
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func isKnownToken(token string) bool {
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return getValueFromStringIntMap(prices, token) != nil
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}
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BIN
contract.nef
Normal file
BIN
contract.nef
Normal file
Binary file not shown.
9
go.mod
9
go.mod
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@ -1,10 +1,5 @@
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module contracts
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go 1.21.5
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go 1.21
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require (
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github.com/go-resty/resty/v2 v2.11.0
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github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231228104959-3176f72878ba
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)
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require golang.org/x/net v0.19.0 // indirect
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require github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231228104959-3176f72878ba
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43
go.sum
43
go.sum
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@ -1,43 +1,2 @@
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github.com/go-resty/resty/v2 v2.11.0/go.mod h1:iiP/OpA0CkcL3IGt1O0+/SIItFUbkkyw5BGXiVdTu+A=
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github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231228104959-3176f72878ba h1:eDgYwTfBkupMnrVxs2Rmk21Cf/BG0jocYc3EvlH9np4=
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github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231228104959-3176f72878ba/go.mod h1:J/Mk6+nKeKSW4wygkZQFLQ6SkLOSGX5Ga0RuuuktEag=
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github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
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golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
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golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
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golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
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golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
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golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
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golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
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golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
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golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
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golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
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golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
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golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
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golang.org/x/term v0.13.0/go.mod h1:LTmsnFJwVN6bCy1rVCoS+qHT1HhALEFxKncY3WNNh4U=
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golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
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golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
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golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
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golang.org/x/time v0.3.0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
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golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
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golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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