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interop: allow to call CheckWitness without AllowStates

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State access is needed only in specific circumstances.
This commit is contained in:
Evgenii Stratonikov 2020-08-24 13:18:02 +03:00
parent b4bcd23c0f
commit f6319f80e8
2 changed files with 8 additions and 1 deletions
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7
pkg/core/interop/runtime/witness.go
View file

@ -9,6 +9,7 @@ import (
"github.com/nspcc-dev/neo-go/pkg/core/interop"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm"
)
@ -20,6 +21,9 @@ func CheckHashedWitness(ic *interop.Context, hash util.Uint160) (bool, error) {
return checkScope(ic.DAO, tx, ic.VM, hash)
}
if !ic.VM.Context().GetCallFlags().Has(smartcontract.AllowStates) {
return false, errors.New("missing AllowStates call flag")
}
return false, errors.New("script container is not a transaction")
}
@ -49,6 +53,9 @@ func checkScope(d dao.DAO, tx *transaction.Transaction, v *vm.VM, hash util.Uint
if callingScriptHash.Equals(util.Uint160{}) {
return false, nil
}
if !v.Context().GetCallFlags().Has(smartcontract.AllowStates) {
return false, errors.New("missing AllowStates call flag")
}
cs, err := d.GetContractState(callingScriptHash)
if err != nil {
return false, err

2
pkg/core/interops.go
View file

@ -77,7 +77,7 @@ var systemInterops = []interop.Function{
{Name: interopnames.SystemJSONDeserialize, Func: json.Deserialize, Price: 500000, ParamCount: 1},
{Name: interopnames.SystemJSONSerialize, Func: json.Serialize, Price: 100000, ParamCount: 1},
{Name: interopnames.SystemRuntimeCheckWitness, Func: runtime.CheckWitness, Price: 30000,
RequiredFlags: smartcontract.AllowStates, ParamCount: 1},
RequiredFlags: smartcontract.NoneFlag, ParamCount: 1},
{Name: interopnames.SystemRuntimeGasLeft, Func: runtime.GasLeft, Price: 400},
{Name: interopnames.SystemRuntimeGetCallingScriptHash, Func: engineGetCallingScriptHash, Price: 400},
{Name: interopnames.SystemRuntimeGetEntryScriptHash, Func: engineGetEntryScriptHash, Price: 400},