neoneo-go/pkg/rpc/client/native.go

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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")
}
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// GetNNSPrice invokes `getPrice` method on a NeoNameService contract with the specified hash.
func (c *Client) GetNNSPrice(nnsHash util.Uint160) (int64, error) {
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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)
}