67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
package client
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import (
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"fmt"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// PolicyContractHash represents a hash of native Policy contract.
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var PolicyContractHash, _ = util.Uint160DecodeStringBE("e9ff4ca7cc252e1dfddb26315869cd79505906ce")
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// GetMaxTransactionsPerBlock invokes `getMaxTransactionsPerBlock` method on a
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// native Policy contract.
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func (c *Client) GetMaxTransactionsPerBlock() (int64, error) {
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return c.invokeNativePolicyMethod("getMaxTransactionsPerBlock")
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}
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// GetMaxBlockSize invokes `getMaxBlockSize` method on a native Policy contract.
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func (c *Client) GetMaxBlockSize() (int64, error) {
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return c.invokeNativePolicyMethod("getMaxBlockSize")
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}
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// GetFeePerByte invokes `getFeePerByte` method on a native Policy contract.
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func (c *Client) GetFeePerByte() (int64, error) {
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return c.invokeNativePolicyMethod("getFeePerByte")
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}
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func (c *Client) invokeNativePolicyMethod(operation string) (int64, error) {
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result, err := c.InvokeFunction(PolicyContractHash, operation, []smartcontract.Parameter{}, nil)
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if err != nil {
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return 0, err
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}
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err = getInvocationError(result)
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if err != nil {
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return 0, fmt.Errorf("failed to invoke %s Policy method: %w", operation, err)
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}
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return topIntFromStack(result.Stack)
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}
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// IsBlocked invokes `isBlocked` method on native Policy contract.
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func (c *Client) IsBlocked(hash util.Uint160) (bool, error) {
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result, err := c.InvokeFunction(PolicyContractHash, "isBlocked", []smartcontract.Parameter{{
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Type: smartcontract.Hash160Type,
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Value: hash,
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}}, nil)
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if err != nil {
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return false, err
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}
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err = getInvocationError(result)
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if err != nil {
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return false, fmt.Errorf("failed to check if account is blocked: %w", err)
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}
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return topBoolFromStack(result.Stack)
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}
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// topBoolFromStack returns the top boolean value from stack
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func topBoolFromStack(st []stackitem.Item) (bool, error) {
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index := len(st) - 1 // top stack element is last in the array
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result, ok := st[index].Value().(bool)
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if !ok {
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return false, fmt.Errorf("invalid stack item type: %s", st[index].Type())
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}
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return result, nil
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}
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