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58 lines
2.2 KiB
Go
58 lines
2.2 KiB
Go
/*
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Package contract provides functions to work with contracts.
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*/
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package contract
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import (
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"github.com/nspcc-dev/neo-go/pkg/interop"
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"github.com/nspcc-dev/neo-go/pkg/interop/neogointernal"
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)
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// CallFlag specifies valid call flags.
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type CallFlag byte
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// Using `smartcontract` package from compiled contract requires moderate
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// compiler refactoring, thus all flags are mirrored here.
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const (
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ReadStates CallFlag = 1 << iota
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WriteStates
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AllowCall
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AllowNotify
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States = ReadStates | WriteStates
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ReadOnly = ReadStates | AllowCall
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All = States | AllowCall | AllowNotify
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NoneFlag CallFlag = 0
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)
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// IsStandard checks if contract with provided hash is a standard signature/multisig contract.
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// This function uses `System.Contract.IsStandard` syscall.
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func IsStandard(h interop.Hash160) bool {
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return neogointernal.Syscall1("System.Contract.IsStandard", h).(bool)
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}
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// CreateMultisigAccount calculates script hash of an m out of n multisignature
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// script using given m and a set of public keys bytes. This function uses
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// `System.Contract.CreateMultisigAccount` syscall.
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func CreateMultisigAccount(m int, pubs []interop.PublicKey) []byte {
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return neogointernal.Syscall2("System.Contract.CreateMultisigAccount", m, pubs).([]byte)
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}
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// CreateStandardAccount calculates script hash of a given public key.
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// This function uses `System.Contract.CreateStandardAccount` syscall.
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func CreateStandardAccount(pub interop.PublicKey) []byte {
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return neogointernal.Syscall1("System.Contract.CreateStandardAccount", pub).([]byte)
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}
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// GetCallFlags returns calling flags which execution context was created with.
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// This function uses `System.Contract.GetCallFlags` syscall.
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func GetCallFlags() CallFlag {
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return neogointernal.Syscall0("System.Contract.GetCallFlags").(CallFlag)
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}
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// Call executes previously deployed blockchain contract with specified hash
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// (20 bytes in BE form) using provided arguments and call flags.
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// It returns whatever this contract returns. This function uses
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// `System.Contract.Call` syscall.
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func Call(scriptHash interop.Hash160, method string, f CallFlag, args ...interface{}) interface{} {
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return neogointernal.Syscall4("System.Contract.Call", scriptHash, method, f, args)
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}
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