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core: adjust System.Runtime.CheckWitness interop

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Part of #1055.

It should have `AllowStates` flag.

Also removed unreachable code: we can't have such situation when
script container is not a transaction in the scope of `CheckWitness`
method because:
1. Blocks have their own implementation of CheckWitness for
internal usage (it's (bc *Blockchain) verifyHeaderWitnesses method).
2. For the outside calls of System.Runtime.CheckWitness interop (e.g.
calls from smart-contract) script container is always a transaction.
This commit is contained in:
Anna Shaleva 2020-07-21 14:02:47 +03:00
parent c9ef7425ac
commit 8fed383523
2 changed files with 3 additions and 12 deletions
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12
pkg/core/interop/runtime/witness.go
View file

@ -19,17 +19,7 @@ func CheckHashedWitness(ic *interop.Context, hash util.Uint160) (bool, error) {
return checkScope(ic.DAO, tx, ic.ScriptGetter, hash)
}
// only for non-Transaction types (Block, etc.)
hashes, err := ic.Chain.GetScriptHashesForVerifying(ic.Tx)
if err != nil {
return false, errors.Wrap(err, "failed to get script hashes")
}
for _, v := range hashes {
if hash.Equals(v) {
return true, nil
}
}
return false, nil
return false, errors.New("script container is not a transaction")
}
func checkScope(d dao.DAO, tx *transaction.Transaction, v vm.ScriptHashGetter, hash util.Uint160) (bool, error) {

3
pkg/core/interops.go
View file

@ -110,7 +110,8 @@ var systemInterops = []interop.Function{
{Name: "System.Iterator.Values", Func: iterator.Values, Price: 400},
{Name: "System.Json.Deserialize", Func: json.Deserialize, Price: 500000},
{Name: "System.Json.Serialize", Func: json.Serialize, Price: 100000},
{Name: "System.Runtime.CheckWitness", Func: runtime.CheckWitness, Price: 30000},
{Name: "System.Runtime.CheckWitness", Func: runtime.CheckWitness, Price: 30000,
RequiredFlags: smartcontract.AllowStates},
{Name: "System.Runtime.GasLeft", Func: runtime.GasLeft, Price: 400},
{Name: "System.Runtime.GetCallingScriptHash", Func: engineGetCallingScriptHash, Price: 400},
{Name: "System.Runtime.GetEntryScriptHash", Func: engineGetEntryScriptHash, Price: 400},