forked from TrueCloudLab/neoneo-go
5cebd4a7a2
Previously we could generate dynamic appcall with a kludge of
AppCall([]byte{/* 20 zeroes */, realScriptHash, args...)
Now there is a separate function for this.
66 lines
3 KiB
Go
66 lines
3 KiB
Go
/*
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Package engine provides access to VM execution metadata and allows to make contract calls.
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It's roughly similar in function to ExecutionEngine class in the Neo .net
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framework.
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*/
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package engine
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import "github.com/nspcc-dev/neo-go/pkg/interop/transaction"
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// GetScriptContainer returns the transaction that initially triggered current
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// execution context. It never changes in a single execution, no matter how deep
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// this execution goes. See `transaction` package for details on how to use the
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// returned value. This function uses `System.ExecutionEngine.GetScriptContainer`
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// syscall.
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func GetScriptContainer() transaction.Transaction {
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return transaction.Transaction{}
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}
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// GetExecutingScriptHash returns script hash (160 bit in BE form represented
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// as 20-byte slice) of the contract that is currently being executed. Any
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// AppCall can change the value returned by this function if it calls a
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// different contract. This function uses
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// `System.ExecutionEngine.GetExecutingScriptHash` syscall.
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func GetExecutingScriptHash() []byte {
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return nil
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}
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// GetCallingScriptHash returns script hash (160 bit in BE form represented
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// as 20-byte slice) of the contract that started the execution of the currently
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// running context (caller of current contract or function), so it's one level
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// above the GetExecutingScriptHash in the call stack. It uses
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// `System.ExecutionEngine.GetCallingScriptHash` syscall.
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func GetCallingScriptHash() []byte {
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return nil
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}
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// GetEntryScriptHash returns script hash (160 bit in BE form represented
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// as 20-byte slice) of the contract that initially started current execution
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// (this is a script that is contained in a transaction returned by
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// GetScriptContainer) execution from the start. This function uses
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// `System.ExecutionEngine.GetEntryScriptHash` syscall.
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func GetEntryScriptHash() []byte {
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return nil
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}
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// AppCall executes previously deployed blockchain contract with specified hash
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// (160 bit in BE form represented as 20-byte slice) using provided arguments.
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// It returns whatever this contract returns. Even though this function accepts
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// a slice for scriptHash you can only use it for contracts known at
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// compile time, because there is a significant difference between static and
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// dynamic calls in Neo (contracts should have a special property declared
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// and paid for to be able to use dynamic calls). This function uses `APPCALL`
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// opcode.
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func AppCall(scriptHash []byte, args ...interface{}) interface{} {
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return nil
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}
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// DynAppCall executes previously deployed blockchain contract with specified
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// hash (160 bit in BE form represented as 20-byte slice) using provided
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// arguments. It returns whatever this contract returns. It differs from AppCall
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// in that you can use it for truly dynamic scriptHash values, but at the same
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// time using it requires HasDynamicInvoke property set for a contract doing
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// this call. This function uses `APPCALL` opcode.
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func DynAppCall(scriptHash []byte, args ...interface{}) interface{} {
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return nil
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}
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