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https://github.com/nspcc-dev/neo-go.git
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92 lines
2.8 KiB
Go
92 lines
2.8 KiB
Go
package client
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// Various non-policy things from native contracts.
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import (
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"crypto/elliptic"
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"fmt"
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"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
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"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// GetOraclePrice invokes `getPrice` method on a native Oracle contract.
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func (c *Client) GetOraclePrice() (int64, error) {
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oracleHash, err := c.GetNativeContractHash(nativenames.Notary)
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if err != nil {
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return 0, fmt.Errorf("failed to get native Oracle hash: %w", err)
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}
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return c.invokeNativeGetMethod(oracleHash, "getPrice")
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}
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// GetNNSPrice invokes `getPrice` method on a native NameService contract.
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func (c *Client) GetNNSPrice() (int64, error) {
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nnsHash, err := c.GetNativeContractHash(nativenames.NameService)
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if err != nil {
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return 0, fmt.Errorf("failed to get native NameService hash: %w", err)
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}
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return c.invokeNativeGetMethod(nnsHash, "getPrice")
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}
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// GetGasPerBlock invokes `getGasPerBlock` method on a native NEO contract.
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func (c *Client) GetGasPerBlock() (int64, error) {
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neoHash, err := c.GetNativeContractHash(nativenames.Neo)
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if err != nil {
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return 0, fmt.Errorf("failed to get native NEO hash: %w", err)
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}
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return c.invokeNativeGetMethod(neoHash, "getGasPerBlock")
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}
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// GetDesignatedByRole invokes `getDesignatedByRole` method on a native RoleManagement contract.
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func (c *Client) GetDesignatedByRole(role noderoles.Role, index uint32) (keys.PublicKeys, error) {
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rmHash, err := c.GetNativeContractHash(nativenames.Designation)
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if err != nil {
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return nil, fmt.Errorf("failed to get native RoleManagement hash: %w", err)
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}
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result, err := c.InvokeFunction(rmHash, "getDesignatedByRole", []smartcontract.Parameter{
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{
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Type: smartcontract.IntegerType,
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Value: int64(role),
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},
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{
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Type: smartcontract.IntegerType,
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Value: int64(index),
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},
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}, nil)
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if err != nil {
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return nil, err
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}
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err = getInvocationError(result)
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if err != nil {
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return nil, fmt.Errorf("`getDesignatedByRole`: %w", err)
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}
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return topPublicKeysFromStack(result.Stack)
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}
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// topPublicKeysFromStack returns the top array of public keys from stack.
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func topPublicKeysFromStack(st []stackitem.Item) (keys.PublicKeys, error) {
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index := len(st) - 1 // top stack element is last in the array
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var (
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pks keys.PublicKeys
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err error
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)
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items, ok := st[index].Value().([]stackitem.Item)
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if !ok {
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return nil, fmt.Errorf("invalid stack item type: %s", st[index].Type())
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}
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pks = make(keys.PublicKeys, len(items))
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for i, item := range items {
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val, ok := item.Value().([]byte)
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if !ok {
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return nil, fmt.Errorf("invalid array element #%d: %s", i, item.Type())
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}
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pks[i], err = keys.NewPublicKeyFromBytes(val, elliptic.P256())
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if err != nil {
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return nil, err
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}
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}
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return pks, nil
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}
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