package collectibles import ( "context" "database/sql" "errors" "fmt" "math/big" "strings" "github.com/ethereum/go-ethereum" "github.com/ethereum/go-ethereum/accounts/abi" "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/log" "github.com/status-im/status-go/account" "github.com/status-im/status-go/contracts/assets" "github.com/status-im/status-go/contracts/collectibles" "github.com/status-im/status-go/params" "github.com/status-im/status-go/protocol/protobuf" "github.com/status-im/status-go/rpc" "github.com/status-im/status-go/services/utils" "github.com/status-im/status-go/services/wallet/bigint" "github.com/status-im/status-go/transactions" ) func NewAPI(rpcClient *rpc.Client, accountsManager *account.GethManager, config *params.NodeConfig, appDb *sql.DB) *API { return &API{ RPCClient: rpcClient, accountsManager: accountsManager, config: config, db: NewCommunityTokensDatabase(appDb), } } type API struct { RPCClient *rpc.Client accountsManager *account.GethManager config *params.NodeConfig db *Database } type DeploymentDetails struct { ContractAddress string `json:"contractAddress"` TransactionHash string `json:"transactionHash"` } const maxSupply = 999999999 type DeploymentParameters struct { Name string `json:"name"` Symbol string `json:"symbol"` Supply *bigint.BigInt `json:"supply"` InfiniteSupply bool `json:"infiniteSupply"` Transferable bool `json:"transferable"` RemoteSelfDestruct bool `json:"remoteSelfDestruct"` TokenURI string `json:"tokenUri"` } func (d *DeploymentParameters) GetSupply() *big.Int { if d.InfiniteSupply { return d.GetInfiniteSupply() } return d.Supply.Int } // infinite supply for ERC721 is 2^256-1 func (d *DeploymentParameters) GetInfiniteSupply() *big.Int { max := new(big.Int).Exp(big.NewInt(2), big.NewInt(256), nil) max.Sub(max, big.NewInt(1)) return max } func (d *DeploymentParameters) Validate(isAsset bool) error { if len(d.Name) <= 0 { return errors.New("empty collectible name") } if len(d.Symbol) <= 0 { return errors.New("empty collectible symbol") } var maxForType = big.NewInt(maxSupply) if isAsset { assetMultiplier, _ := big.NewInt(0).SetString("1000000000000000000", 10) maxForType = maxForType.Mul(maxForType, assetMultiplier) } if !d.InfiniteSupply && (d.Supply.Cmp(big.NewInt(0)) < 0 || d.Supply.Cmp(maxForType) > 0) { return fmt.Errorf("wrong supply value: %v", d.Supply) } return nil } func (api *API) DeployCollectibles(ctx context.Context, chainID uint64, deploymentParameters DeploymentParameters, txArgs transactions.SendTxArgs, password string) (DeploymentDetails, error) { err := deploymentParameters.Validate(false) if err != nil { return DeploymentDetails{}, err } transactOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password)) ethClient, err := api.RPCClient.EthClient(chainID) if err != nil { log.Error(err.Error()) return DeploymentDetails{}, err } address, tx, _, err := collectibles.DeployCollectibles(transactOpts, ethClient, deploymentParameters.Name, deploymentParameters.Symbol, deploymentParameters.GetSupply(), deploymentParameters.RemoteSelfDestruct, deploymentParameters.Transferable, deploymentParameters.TokenURI) if err != nil { log.Error(err.Error()) return DeploymentDetails{}, err } return DeploymentDetails{address.Hex(), tx.Hash().Hex()}, nil } func (api *API) DeployAssets(ctx context.Context, chainID uint64, deploymentParameters DeploymentParameters, txArgs transactions.SendTxArgs, password string) (DeploymentDetails, error) { err := deploymentParameters.Validate(true) if err != nil { return DeploymentDetails{}, err } transactOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password)) ethClient, err := api.RPCClient.EthClient(chainID) if err != nil { log.Error(err.Error()) return DeploymentDetails{}, err } address, tx, _, err := assets.DeployAssets(transactOpts, ethClient, deploymentParameters.Name, deploymentParameters.Symbol, deploymentParameters.GetSupply()) if err != nil { log.Error(err.Error()) return DeploymentDetails{}, err } return DeploymentDetails{address.Hex(), tx.Hash().Hex()}, nil } // Returns gas units + 10% func (api *API) DeployCollectiblesEstimate(ctx context.Context) (uint64, error) { gasAmount := uint64(1960645) return gasAmount + uint64(float32(gasAmount)*0.1), nil } // Returns gas units + 10% func (api *API) DeployAssetsEstimate(ctx context.Context) (uint64, error) { gasAmount := uint64(957483) return gasAmount + uint64(float32(gasAmount)*0.1), nil } func (api *API) newCollectiblesInstance(chainID uint64, contractAddress string) (*collectibles.Collectibles, error) { backend, err := api.RPCClient.EthClient(chainID) if err != nil { return nil, err } return collectibles.NewCollectibles(common.HexToAddress(contractAddress), backend) } func (api *API) newAssetsInstance(chainID uint64, contractAddress string) (*assets.Assets, error) { backend, err := api.RPCClient.EthClient(chainID) if err != nil { return nil, err } return assets.NewAssets(common.HexToAddress(contractAddress), backend) } // if we want to mint 2 tokens to addresses ["a", "b"] we need to mint // twice to every address - we need to send to smart contract table ["a", "a", "b", "b"] func (api *API) multiplyWalletAddresses(amount *bigint.BigInt, contractAddresses []string) []string { var totalAddresses []string for i := big.NewInt(1); i.Cmp(amount.Int) <= 0; { totalAddresses = append(totalAddresses, contractAddresses...) i.Add(i, big.NewInt(1)) } return totalAddresses } func (api *API) prepareMintCollectiblesData(walletAddresses []string, amount *bigint.BigInt) []common.Address { totalAddresses := api.multiplyWalletAddresses(amount, walletAddresses) var usersAddresses = []common.Address{} for _, k := range totalAddresses { usersAddresses = append(usersAddresses, common.HexToAddress(k)) } return usersAddresses } // Universal minting function for both assets and collectibles. // Checks contract type and runs MintCollectibles or MintAssets function. func (api *API) MintTokens(ctx context.Context, chainID uint64, contractAddress string, txArgs transactions.SendTxArgs, password string, walletAddresses []string, amount *bigint.BigInt) (string, error) { tokenType, err := api.db.GetTokenType(chainID, contractAddress) if err != nil { return "", err } switch tokenType { case protobuf.CommunityTokenType_ERC721: return api.MintCollectibles(ctx, chainID, contractAddress, txArgs, password, walletAddresses, amount) case protobuf.CommunityTokenType_ERC20: return api.MintAssets(ctx, chainID, contractAddress, txArgs, password, walletAddresses, amount) default: return "", fmt.Errorf("unknown token type: %v", tokenType) } } func (api *API) EstimateMintTokens(ctx context.Context, chainID uint64, contractAddress string, walletAddresses []string, amount *bigint.BigInt) (uint64, error) { tokenType, err := api.db.GetTokenType(chainID, contractAddress) if err != nil { return 0, err } switch tokenType { case protobuf.CommunityTokenType_ERC721: return api.EstimateMintCollectibles(ctx, chainID, contractAddress, walletAddresses, amount) case protobuf.CommunityTokenType_ERC20: return api.EstimateMintAssets(ctx, chainID, contractAddress, walletAddresses, amount) default: return 0, fmt.Errorf("unknown token type: %v", tokenType) } } // Create the amounty of collectible tokens and distribute them to all walletAddresses. func (api *API) MintCollectibles(ctx context.Context, chainID uint64, contractAddress string, txArgs transactions.SendTxArgs, password string, walletAddresses []string, amount *bigint.BigInt) (string, error) { err := api.validateWalletsAndAmounts(walletAddresses, amount) if err != nil { return "", err } contractInst, err := api.newCollectiblesInstance(chainID, contractAddress) if err != nil { return "", err } usersAddresses := api.prepareMintCollectiblesData(walletAddresses, amount) transactOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password)) tx, err := contractInst.MintTo(transactOpts, usersAddresses) if err != nil { return "", err } return tx.Hash().Hex(), nil } func (api *API) EstimateMintCollectibles(ctx context.Context, chainID uint64, contractAddress string, walletAddresses []string, amount *bigint.BigInt) (uint64, error) { err := api.validateWalletsAndAmounts(walletAddresses, amount) if err != nil { return 0, err } usersAddresses := api.prepareMintCollectiblesData(walletAddresses, amount) return api.estimateMethod(ctx, chainID, contractAddress, "mintTo", usersAddresses) } func (api *API) prepareMintAssetsData(walletAddresses []string, amount *bigint.BigInt) ([]common.Address, []*big.Int) { var usersAddresses = []common.Address{} var amountsList = []*big.Int{} for _, k := range walletAddresses { usersAddresses = append(usersAddresses, common.HexToAddress(k)) amountsList = append(amountsList, amount.Int) } return usersAddresses, amountsList } // Create the amount of assets tokens and distribute them to all walletAddresses. // The amount should be in smallest denomination of the asset (like wei) with decimal = 18, eg. // if we want to mint 2.34 of the token, then amount should be 234{16 zeros}. func (api *API) MintAssets(ctx context.Context, chainID uint64, contractAddress string, txArgs transactions.SendTxArgs, password string, walletAddresses []string, amount *bigint.BigInt) (string, error) { err := api.validateWalletsAndAmounts(walletAddresses, amount) if err != nil { return "", err } contractInst, err := api.newAssetsInstance(chainID, contractAddress) if err != nil { return "", err } usersAddresses, amountsList := api.prepareMintAssetsData(walletAddresses, amount) transactOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password)) tx, err := contractInst.MintTo(transactOpts, usersAddresses, amountsList) if err != nil { return "", err } return tx.Hash().Hex(), nil } // Estimate MintAssets cost. func (api *API) EstimateMintAssets(ctx context.Context, chainID uint64, contractAddress string, walletAddresses []string, amount *bigint.BigInt) (uint64, error) { err := api.validateWalletsAndAmounts(walletAddresses, amount) if err != nil { return 0, err } usersAddresses, amountsList := api.prepareMintAssetsData(walletAddresses, amount) return api.estimateMethod(ctx, chainID, contractAddress, "mintTo", usersAddresses, amountsList) } // This is only ERC721 function func (api *API) RemoteBurn(ctx context.Context, chainID uint64, contractAddress string, txArgs transactions.SendTxArgs, password string, tokenIds []*bigint.BigInt) (string, error) { err := api.validateTokens(tokenIds) if err != nil { return "", err } contractInst, err := api.newCollectiblesInstance(chainID, contractAddress) if err != nil { return "", err } transactOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password)) var tempTokenIds []*big.Int for _, v := range tokenIds { tempTokenIds = append(tempTokenIds, v.Int) } tx, err := contractInst.RemoteBurn(transactOpts, tempTokenIds) if err != nil { return "", err } return tx.Hash().Hex(), nil } // This is only ERC721 function func (api *API) EstimateRemoteBurn(ctx context.Context, chainID uint64, contractAddress string, tokenIds []*bigint.BigInt) (uint64, error) { err := api.validateTokens(tokenIds) if err != nil { return 0, err } var tempTokenIds []*big.Int for _, v := range tokenIds { tempTokenIds = append(tempTokenIds, v.Int) } return api.estimateMethod(ctx, chainID, contractAddress, "remoteBurn", tempTokenIds) } func (api *API) ContractOwner(ctx context.Context, chainID uint64, contractAddress string) (string, error) { callOpts := &bind.CallOpts{Context: ctx, Pending: false} tokenType, err := api.db.GetTokenType(chainID, contractAddress) if err != nil { return "", err } if tokenType == protobuf.CommunityTokenType_ERC721 { contractInst, err := api.newCollectiblesInstance(chainID, contractAddress) if err != nil { return "", err } owner, err := contractInst.Owner(callOpts) if err != nil { return "", err } return owner.String(), nil } else if tokenType == protobuf.CommunityTokenType_ERC20 { contractInst, err := api.newAssetsInstance(chainID, contractAddress) if err != nil { return "", err } owner, err := contractInst.Owner(callOpts) if err != nil { return "", err } return owner.String(), nil } return "", fmt.Errorf("unknown token type: %v", tokenType) } func (api *API) MintedCount(ctx context.Context, chainID uint64, contractAddress string) (*big.Int, error) { callOpts := &bind.CallOpts{Context: ctx, Pending: false} contractInst, err := api.newCollectiblesInstance(chainID, contractAddress) if err != nil { return nil, err } mintedCount, err := contractInst.MintedCount(callOpts) if err != nil { return nil, err } return mintedCount, nil } func (api *API) RemainingSupply(ctx context.Context, chainID uint64, contractAddress string) (*bigint.BigInt, error) { tokenType, err := api.db.GetTokenType(chainID, contractAddress) if err != nil { return nil, err } switch tokenType { case protobuf.CommunityTokenType_ERC721: return api.remainingCollectiblesSupply(ctx, chainID, contractAddress) case protobuf.CommunityTokenType_ERC20: return api.remainingAssetsSupply(ctx, chainID, contractAddress) default: return nil, fmt.Errorf("unknown token type: %v", tokenType) } } // RemainingSupply = MaxSupply - MintedCount func (api *API) remainingCollectiblesSupply(ctx context.Context, chainID uint64, contractAddress string) (*bigint.BigInt, error) { callOpts := &bind.CallOpts{Context: ctx, Pending: false} contractInst, err := api.newCollectiblesInstance(chainID, contractAddress) if err != nil { return nil, err } maxSupply, err := contractInst.MaxSupply(callOpts) if err != nil { return nil, err } mintedCount, err := contractInst.MintedCount(callOpts) if err != nil { return nil, err } var res = new(big.Int) res.Sub(maxSupply, mintedCount) fmt.Printf("Remaining: %v for chain: %v and addr: %v", res, chainID, contractAddress) return &bigint.BigInt{Int: res}, nil } // RemainingSupply = MaxSupply - TotalSupply func (api *API) remainingAssetsSupply(ctx context.Context, chainID uint64, contractAddress string) (*bigint.BigInt, error) { callOpts := &bind.CallOpts{Context: ctx, Pending: false} contractInst, err := api.newAssetsInstance(chainID, contractAddress) if err != nil { return nil, err } maxSupply, err := contractInst.MaxSupply(callOpts) if err != nil { return nil, err } totalSupply, err := contractInst.TotalSupply(callOpts) if err != nil { return nil, err } var res = new(big.Int) res.Sub(maxSupply, totalSupply) return &bigint.BigInt{Int: res}, nil } func (api *API) maxSupplyCollectibles(ctx context.Context, chainID uint64, contractAddress string) (*big.Int, error) { callOpts := &bind.CallOpts{Context: ctx, Pending: false} contractInst, err := api.newCollectiblesInstance(chainID, contractAddress) if err != nil { return nil, err } return contractInst.MaxSupply(callOpts) } func (api *API) maxSupplyAssets(ctx context.Context, chainID uint64, contractAddress string) (*big.Int, error) { callOpts := &bind.CallOpts{Context: ctx, Pending: false} contractInst, err := api.newAssetsInstance(chainID, contractAddress) if err != nil { return nil, err } return contractInst.MaxSupply(callOpts) } func (api *API) maxSupply(ctx context.Context, chainID uint64, contractAddress string) (*big.Int, error) { tokenType, err := api.db.GetTokenType(chainID, contractAddress) if err != nil { return nil, err } switch tokenType { case protobuf.CommunityTokenType_ERC721: return api.maxSupplyCollectibles(ctx, chainID, contractAddress) case protobuf.CommunityTokenType_ERC20: return api.maxSupplyAssets(ctx, chainID, contractAddress) default: return nil, fmt.Errorf("unknown token type: %v", tokenType) } } func (api *API) prepareNewMaxSupply(ctx context.Context, chainID uint64, contractAddress string, burnAmount *bigint.BigInt) (*big.Int, error) { maxSupply, err := api.maxSupply(ctx, chainID, contractAddress) if err != nil { return nil, err } var newMaxSupply = new(big.Int) newMaxSupply.Sub(maxSupply, burnAmount.Int) return newMaxSupply, nil } func (api *API) setMaxSupplyCollectibles(transactOpts *bind.TransactOpts, chainID uint64, contractAddress string, newMaxSupply *big.Int) (*types.Transaction, error) { contractInst, err := api.newCollectiblesInstance(chainID, contractAddress) if err != nil { return nil, err } return contractInst.SetMaxSupply(transactOpts, newMaxSupply) } func (api *API) setMaxSupplyAssets(transactOpts *bind.TransactOpts, chainID uint64, contractAddress string, newMaxSupply *big.Int) (*types.Transaction, error) { contractInst, err := api.newAssetsInstance(chainID, contractAddress) if err != nil { return nil, err } return contractInst.SetMaxSupply(transactOpts, newMaxSupply) } func (api *API) setMaxSupply(transactOpts *bind.TransactOpts, chainID uint64, contractAddress string, newMaxSupply *big.Int) (*types.Transaction, error) { tokenType, err := api.db.GetTokenType(chainID, contractAddress) if err != nil { return nil, err } switch tokenType { case protobuf.CommunityTokenType_ERC721: return api.setMaxSupplyCollectibles(transactOpts, chainID, contractAddress, newMaxSupply) case protobuf.CommunityTokenType_ERC20: return api.setMaxSupplyAssets(transactOpts, chainID, contractAddress, newMaxSupply) default: return nil, fmt.Errorf("unknown token type: %v", tokenType) } } func (api *API) Burn(ctx context.Context, chainID uint64, contractAddress string, txArgs transactions.SendTxArgs, password string, burnAmount *bigint.BigInt) (string, error) { err := api.validateBurnAmount(ctx, burnAmount, chainID, contractAddress) if err != nil { return "", err } transactOpts := txArgs.ToTransactOpts(utils.GetSigner(chainID, api.accountsManager, api.config.KeyStoreDir, txArgs.From, password)) newMaxSupply, err := api.prepareNewMaxSupply(ctx, chainID, contractAddress, burnAmount) if err != nil { return "", err } tx, err := api.setMaxSupply(transactOpts, chainID, contractAddress, newMaxSupply) if err != nil { return "", err } return tx.Hash().Hex(), nil } func (api *API) EstimateBurn(ctx context.Context, chainID uint64, contractAddress string, burnAmount *bigint.BigInt) (uint64, error) { err := api.validateBurnAmount(ctx, burnAmount, chainID, contractAddress) if err != nil { return 0, err } newMaxSupply, err := api.prepareNewMaxSupply(ctx, chainID, contractAddress, burnAmount) if err != nil { return 0, err } return api.estimateMethod(ctx, chainID, contractAddress, "setMaxSupply", newMaxSupply) } func (api *API) validateWalletsAndAmounts(walletAddresses []string, amount *bigint.BigInt) error { if len(walletAddresses) == 0 { return errors.New("wallet addresses list is empty") } if amount.Cmp(big.NewInt(0)) <= 0 { return errors.New("amount is <= 0") } return nil } func (api *API) validateTokens(tokenIds []*bigint.BigInt) error { if len(tokenIds) == 0 { return errors.New("token list is empty") } return nil } func (api *API) validateBurnAmount(ctx context.Context, burnAmount *bigint.BigInt, chainID uint64, contractAddress string) error { if burnAmount.Cmp(big.NewInt(0)) <= 0 { return errors.New("burnAmount is less than 0") } remainingSupply, err := api.RemainingSupply(ctx, chainID, contractAddress) if err != nil { return err } if burnAmount.Cmp(remainingSupply.Int) > 1 { return errors.New("burnAmount is bigger than remaining amount") } return nil } func (api *API) packCollectibleMethod(ctx context.Context, methodName string, args ...interface{}) ([]byte, error) { collectiblesABI, err := abi.JSON(strings.NewReader(collectibles.CollectiblesABI)) if err != nil { return []byte{}, err } return collectiblesABI.Pack(methodName, args...) } func (api *API) packAssetsMethod(ctx context.Context, methodName string, args ...interface{}) ([]byte, error) { assetsABI, err := abi.JSON(strings.NewReader(assets.AssetsABI)) if err != nil { return []byte{}, err } return assetsABI.Pack(methodName, args...) } func (api *API) estimateMethod(ctx context.Context, chainID uint64, contractAddress string, methodName string, args ...interface{}) (uint64, error) { ethClient, err := api.RPCClient.EthClient(chainID) if err != nil { log.Error(err.Error()) return 0, err } tokenType, err := api.db.GetTokenType(chainID, contractAddress) if err != nil { return 0, err } var data []byte switch tokenType { case protobuf.CommunityTokenType_ERC721: data, err = api.packCollectibleMethod(ctx, methodName, args...) case protobuf.CommunityTokenType_ERC20: data, err = api.packAssetsMethod(ctx, methodName, args...) default: err = fmt.Errorf("unknown token type: %v", tokenType) } if err != nil { return 0, err } ownerAddr, err := api.ContractOwner(ctx, chainID, contractAddress) if err != nil { return 0, err } toAddr := common.HexToAddress(contractAddress) fromAddr := common.HexToAddress(ownerAddr) callMsg := ethereum.CallMsg{ From: fromAddr, To: &toAddr, Value: big.NewInt(0), Data: data, } estimate, err := ethClient.EstimateGas(ctx, callMsg) if err != nil { return 0, err } return estimate + uint64(float32(estimate)*0.1), nil }