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sdk.go
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sdk.go
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package nftlabs
import (
"context"
"crypto/ecdsa"
"math/big"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethclient"
)
type ISdk interface {
GetNftModule(address string) (Nft, error)
GetMarketModule(address string) (Market, error)
GetMarketplaceModule(address string) (Marketplace, error)
GetCurrencyModule(address string) (Currency, error)
GetPackModule(address string) (Pack, error)
GetNftCollectionModule(address string) (NftCollection, error)
GetStorage() (Storage, error)
TransferNativeToken(to string, amount *big.Int) error
SetStorage(gateway Storage)
getSignerAddress() common.Address
getSigner() func(address common.Address, transaction *types.Transaction) (*types.Transaction, error)
getRawPrivateKey() string
getOptions() *SdkOptions
getGateway() Storage
getTransactOpts(send bool) *bind.TransactOpts
}
type Sdk struct {
client *ethclient.Client
opt *SdkOptions
privateKey *ecdsa.PrivateKey
rawPrivateKey string
signerAddress common.Address
gateway Storage
}
func NewSdk(client *ethclient.Client, opt *SdkOptions) (*Sdk, error) {
if opt.IpfsGatewayUrl == "" {
opt.IpfsGatewayUrl = "https://cloudflare-ipfs.com/ipfs/"
}
defaultGateway := newIpfsStorage(opt.IpfsGatewayUrl)
sdk := &Sdk{
client: client,
opt: opt,
gateway: defaultGateway,
}
if opt.PrivateKey != "" {
if err := sdk.setPrivateKey(opt.PrivateKey); err != nil {
return nil, err
}
}
return sdk, nil
}
func (sdk *Sdk) GetCurrencyModule(address string) (Currency, error) {
module, err := newCurrencyModule(sdk.client, address, sdk)
if err != nil {
return nil, err
}
return module, nil
}
func (sdk *Sdk) GetMarketModule(address string) (Market, error) {
module, err := newMarketModule(sdk.client, address, sdk)
if err != nil {
return nil, err
}
return module, nil
}
func (sdk *Sdk) GetMarketplaceModule(address string) (Marketplace, error) {
module, err := newMarketplaceModule(sdk.client, address, sdk)
if err != nil {
return nil, err
}
return module, nil
}
func (sdk *Sdk) GetNftModule(address string) (Nft, error) {
module, err := newNftModule(sdk.client, address, sdk)
if err != nil {
return nil, err
}
return module, nil
}
func (sdk *Sdk) GetPackModule(address string) (Pack, error) {
module, err := newPackModule(sdk.client, address, sdk)
if err != nil {
return nil, err
}
return module, nil
}
func (sdk *Sdk) GetStorage() (Storage, error) {
if sdk.gateway != nil {
return sdk.gateway, nil
}
module := newIpfsStorage(sdk.opt.IpfsGatewayUrl)
sdk.gateway = module
return module, nil
}
func (sdk *Sdk) GetNftCollectionModule(address string) (NftCollection, error) {
module, err := newNftCollectionModule(sdk.client, address, sdk)
if err != nil {
return nil, err
}
return module, nil
}
func (sdk *Sdk) setPrivateKey(privateKey string) error {
if pKey, publicAddress, err := processPrivateKey(privateKey); err != nil {
return err
} else {
sdk.privateKey = pKey
sdk.signerAddress = publicAddress
sdk.rawPrivateKey = privateKey
}
return nil
}
func (sdk *Sdk) getSigner() func(address common.Address, transaction *types.Transaction) (*types.Transaction, error) {
return func(address common.Address, transaction *types.Transaction) (*types.Transaction, error) {
ctx := context.Background()
chainId, _ := sdk.client.ChainID(ctx)
return types.SignTx(transaction, types.LatestSignerForChainID(chainId), sdk.privateKey)
}
}
func (sdk *Sdk) getSignerAddress() common.Address {
return sdk.signerAddress
}
func (sdk *Sdk) getRawPrivateKey() string {
return sdk.rawPrivateKey
}
func (sdk *Sdk) getOptions() *SdkOptions {
return sdk.opt
}
func (sdk *Sdk) SetStorage(gateway Storage) {
sdk.gateway = gateway
}
func (sdk *Sdk) getGateway() Storage {
return sdk.gateway
}
func (sdk *Sdk) getTransactOpts(send bool) *bind.TransactOpts {
var tipCap, feeCap *big.Int
block, err := sdk.client.BlockByNumber(context.Background(), nil)
if err == nil && block.BaseFee() != nil {
tipCap, _ = big.NewInt(0).SetString("2500000000", 10)
baseFee := big.NewInt(0).Mul(block.BaseFee(), big.NewInt(2))
feeCap = big.NewInt(0).Add(baseFee, tipCap)
}
if sdk.opt.GasPrice != nil {
gasPriceInGwei := big.NewInt(1)
toGweiFactor := big.NewInt(1).Exp(big.NewInt(10), big.NewInt(9), nil)
finalGasPrice := gasPriceInGwei.Mul(sdk.opt.GasPrice, toGweiFactor)
return &bind.TransactOpts{
NoSend: !send,
From: sdk.getSignerAddress(),
Signer: sdk.getSigner(),
GasPrice: finalGasPrice,
}
}
return &bind.TransactOpts{
NoSend: !send,
From: sdk.getSignerAddress(),
Signer: sdk.getSigner(),
GasTipCap: tipCap,
GasFeeCap: feeCap,
}
}
func (sdk *Sdk) TransferNativeToken(to string, amount *big.Int) error {
if sdk.getSignerAddress() == common.HexToAddress("0") {
return &NoSignerError{typeName: "SDK"}
}
nonce, err := sdk.client.PendingNonceAt(context.Background(), sdk.getSignerAddress())
if err != nil {
return err
}
gasLimit := uint64(21000) // in units
gasPrice, err := sdk.client.SuggestGasPrice(context.Background())
if err != nil {
return err
}
var data []byte
tx := types.NewTransaction(nonce, common.HexToAddress(to), amount, gasLimit, gasPrice, data)
chainID, err := sdk.client.NetworkID(context.Background())
if err != nil {
return err
}
signedTx, err := types.SignTx(tx, types.LatestSignerForChainID(chainID), sdk.privateKey)
if err != nil {
return err
}
err = sdk.client.SendTransaction(context.Background(), signedTx)
if err != nil {
return err
}
return nil
}