package client // Various non-policy things from native contracts. import ( "errors" "fmt" nns "github.com/nspcc-dev/neo-go/examples/nft-nd-nns" "github.com/nspcc-dev/neo-go/pkg/core/native/nativenames" "github.com/nspcc-dev/neo-go/pkg/core/native/noderoles" "github.com/nspcc-dev/neo-go/pkg/crypto/keys" "github.com/nspcc-dev/neo-go/pkg/smartcontract" "github.com/nspcc-dev/neo-go/pkg/util" ) // GetOraclePrice invokes `getPrice` method on a native Oracle contract. func (c *Client) GetOraclePrice() (int64, error) { oracleHash, err := c.GetNativeContractHash(nativenames.Notary) if err != nil { return 0, fmt.Errorf("failed to get native Oracle hash: %w", err) } return c.invokeNativeGetMethod(oracleHash, "getPrice") } // GetNNSPrice invokes `getPrice` method on a NeoNameService contract with the specified hash. func (c *Client) GetNNSPrice(nnsHash util.Uint160) (int64, error) { return c.invokeNativeGetMethod(nnsHash, "getPrice") } // GetGasPerBlock invokes `getGasPerBlock` method on a native NEO contract. func (c *Client) GetGasPerBlock() (int64, error) { return c.getFromNEO("getGasPerBlock") } // GetCandidateRegisterPrice invokes `getRegisterPrice` method on native NEO contract. func (c *Client) GetCandidateRegisterPrice() (int64, error) { return c.getFromNEO("getRegisterPrice") } func (c *Client) getFromNEO(meth string) (int64, error) { neoHash, err := c.GetNativeContractHash(nativenames.Neo) if err != nil { return 0, fmt.Errorf("failed to get native NEO hash: %w", err) } return c.invokeNativeGetMethod(neoHash, meth) } // GetDesignatedByRole invokes `getDesignatedByRole` method on a native RoleManagement contract. func (c *Client) GetDesignatedByRole(role noderoles.Role, index uint32) (keys.PublicKeys, error) { rmHash, err := c.GetNativeContractHash(nativenames.Designation) if err != nil { return nil, fmt.Errorf("failed to get native RoleManagement hash: %w", err) } result, err := c.InvokeFunction(rmHash, "getDesignatedByRole", []smartcontract.Parameter{ { Type: smartcontract.IntegerType, Value: int64(role), }, { Type: smartcontract.IntegerType, Value: int64(index), }, }, nil) if err != nil { return nil, err } err = getInvocationError(result) if err != nil { return nil, fmt.Errorf("`getDesignatedByRole`: %w", err) } return topPublicKeysFromStack(result.Stack) } // NNSResolve invokes `resolve` method on a NameService contract with the specified hash. func (c *Client) NNSResolve(nnsHash util.Uint160, name string, typ nns.RecordType) (string, error) { if typ == nns.CNAME { return "", errors.New("can't resolve CNAME record type") } result, err := c.InvokeFunction(nnsHash, "resolve", []smartcontract.Parameter{ { Type: smartcontract.StringType, Value: name, }, { Type: smartcontract.IntegerType, Value: int64(typ), }, }, nil) if err != nil { return "", err } err = getInvocationError(result) if err != nil { return "", fmt.Errorf("`resolve`: %w", err) } return topStringFromStack(result.Stack) } // NNSIsAvailable invokes `isAvailable` method on a NeoNameService contract with the specified hash. func (c *Client) NNSIsAvailable(nnsHash util.Uint160, name string) (bool, error) { result, err := c.InvokeFunction(nnsHash, "isAvailable", []smartcontract.Parameter{ { Type: smartcontract.StringType, Value: name, }, }, nil) if err != nil { return false, err } err = getInvocationError(result) if err != nil { return false, fmt.Errorf("`isAvailable`: %w", err) } return topBoolFromStack(result.Stack) }