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