status-go/services/wallet/onramp/provider_mercuryo.go

package onramp

import (
	"context"
	"crypto/sha512"
	"errors"
	"fmt"
	"strings"
	"sync"
	"time"

	"github.com/ethereum/go-ethereum/common"

	walletCommon "github.com/status-im/status-go/services/wallet/common"
	"github.com/status-im/status-go/services/wallet/thirdparty/mercuryo"
	"github.com/status-im/status-go/services/wallet/token"
)

const mercuryoID = "mercuryo"
const mercuryioNoFeesBaseURL = "https://exchange.mercuryo.io/?type=buy&networks=ETHEREUM,ARBITRUM,OPTIMISM&currency=ETH"
const supportedAssetsUpdateInterval = 24 * time.Hour

type MercuryoProvider struct {
	supportedTokens          []*token.Token
	supportedTokensTimestamp time.Time
	supportedTokensLock      sync.RWMutex
	httpClient               *mercuryo.Client
	tokenManager             token.ManagerInterface
}

func NewMercuryoProvider(tokenManager token.ManagerInterface) *MercuryoProvider {
	return &MercuryoProvider{
		httpClient:   mercuryo.NewClient(),
		tokenManager: tokenManager,
	}
}

func (p *MercuryoProvider) ID() string {
	return mercuryoID
}

func (p *MercuryoProvider) GetCryptoOnRamp(ctx context.Context) (CryptoOnRamp, error) {
	const (
		logoMercuryo = "data:image/jpeg;base64,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
	)

	provider := CryptoOnRamp{
		ID:                        mercuryoID,
		Name:                      "Mercuryo",
		Description:               "Buy crypto within 15 seconds",
		Fees:                      "4.5%",
		LogoURL:                   logoMercuryo,
		Hostname:                  "mercuryo.io",
		SupportsSinglePurchase:    true,
		SupportsRecurrentPurchase: true,
		SupportedChainIDs:         []uint64{walletCommon.EthereumMainnet, walletCommon.ArbitrumMainnet, walletCommon.OptimismMainnet},
		URLsNeedParameters:        true,
		SiteURL:                   mercuryioNoFeesBaseURL,
		RecurrentSiteURL:          mercuryioNoFeesBaseURL + "&widget_flow=recurrent",
	}

	var err error
	provider.SupportedTokens, err = p.getSupportedCurrencies(ctx)
	return provider, err
}

func (p *MercuryoProvider) getSupportedCurrencies(ctx context.Context) ([]*token.Token, error) {
	p.supportedTokensLock.Lock()
	defer p.supportedTokensLock.Unlock()

	if time.Since(p.supportedTokensTimestamp) < supportedAssetsUpdateInterval {
		return p.supportedTokens, nil
	}

	newSupportedCurrencies, err := p.httpClient.FetchCurrencies(ctx)
	if err != nil {
		return p.supportedTokens, err
	}

	newSupportedTokens := make([]*token.Token, 0, len(newSupportedCurrencies))
	for _, currency := range newSupportedCurrencies {
		chainID := mercuryo.NetworkToCommonChainID(currency.Network)
		if chainID == walletCommon.UnknownChainID {
			continue
		}
		token, isNative := p.tokenManager.LookupToken(&chainID, currency.Symbol)
		if token == nil {
			continue
		}
		if !isNative {
			contractAddress := common.HexToAddress(currency.Contract)
			if contractAddress != token.Address {
				continue
			}
		}
		newSupportedTokens = append(newSupportedTokens, token)
	}

	p.supportedTokens = newSupportedTokens
	p.supportedTokensTimestamp = time.Now()

	return p.supportedTokens, nil
}

// Should generate the SHA512 hash of the string "AddressKey"
func getMercuryoSignature(address common.Address, key string) string {
	addressString := address.Hex()

	hash := sha512.New()
	hash.Write([]byte(addressString[:] + key))
	return fmt.Sprintf("%x", hash.Sum(nil))
}

func getMercuryoCurrency(symbol string) string {
	return strings.ToUpper(symbol)
}

func (p *MercuryoProvider) GetURL(ctx context.Context, parameters Parameters) (string, error) {
	const (
		baseURL      = "https://exchange.mercuryo.io/?type=buy"
		widgetID     = "6a7eb330-2b09-49b7-8fd3-1c77cfb6cd47"
		widgetSecret = "AZ5fmxmrgyrXH3zre6yHU2Vw9fPqEw82" // #nosec G101
	)

	if parameters.DestAddress == nil || *parameters.DestAddress == walletCommon.ZeroAddress() {
		return "", errors.New("destination address is required")
	}

	if parameters.ChainID == nil || *parameters.ChainID == walletCommon.UnknownChainID {
		return "", errors.New("chainID is required")
	}

	if parameters.Symbol == nil || *parameters.Symbol == "" {
		return "", errors.New("symbol is required")
	}

	network := mercuryo.CommonChainIDToNetwork(*parameters.ChainID)
	if network == "" {
		return "", errors.New("unsupported chainID")
	}

	currency := getMercuryoCurrency(*parameters.Symbol)
	if currency == "" {
		return "", errors.New("unsupported symbol")
	}

	// TODO #16005: Move signature generation to proxy server
	signature := getMercuryoSignature(*parameters.DestAddress, widgetSecret)
	url := fmt.Sprintf("%s&network=%s&currency=%s&address=%s&hide_address=false&fix_address=true&signature=%s&widget_id=%s",
		baseURL, network, currency, parameters.DestAddress.Hex(), signature, widgetID)

	if parameters.IsRecurrent {
		url = url + "&widget_flow=recurrent"
	}

	return url, nil
}