neo-go/pkg/core/native_contract_test.go

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package core
import (
"errors"
"math/big"
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"testing"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
"github.com/nspcc-dev/neo-go/pkg/core/dao"
"github.com/nspcc-dev/neo-go/pkg/core/fee"
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"github.com/nspcc-dev/neo-go/pkg/core/interop"
"github.com/nspcc-dev/neo-go/pkg/core/interop/contract"
"github.com/nspcc-dev/neo-go/pkg/core/native"
"github.com/nspcc-dev/neo-go/pkg/core/state"
"github.com/nspcc-dev/neo-go/pkg/core/storage"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm"
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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"github.com/stretchr/testify/require"
)
type testNative struct {
meta interop.ContractMD
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blocks chan uint32
}
func (tn *testNative) Initialize(_ *interop.Context) error {
return nil
}
func (tn *testNative) Metadata() *interop.ContractMD {
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return &tn.meta
}
func (tn *testNative) OnPersist(ic *interop.Context) error {
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select {
case tn.blocks <- ic.Block.Index:
return nil
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default:
return errors.New("can't send index")
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}
}
func (tn *testNative) PostPersist(ic *interop.Context) error {
return nil
}
var _ interop.Contract = (*testNative)(nil)
// registerNative registers native contract in the blockchain.
func (bc *Blockchain) registerNative(c interop.Contract) {
bc.contracts.Contracts = append(bc.contracts.Contracts, c)
}
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const testSumPrice = 1 << 15 * interop.DefaultBaseExecFee // same as contract.Call
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func newTestNative() *testNative {
tn := &testNative{
meta: *interop.NewContractMD("Test.Native.Sum", 0),
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blocks: make(chan uint32, 1),
}
desc := &manifest.Method{
Name: "sum",
Parameters: []manifest.Parameter{
manifest.NewParameter("addend1", smartcontract.IntegerType),
manifest.NewParameter("addend2", smartcontract.IntegerType),
},
ReturnType: smartcontract.IntegerType,
Safe: true,
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}
md := &interop.MethodAndPrice{
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Func: tn.sum,
Price: testSumPrice,
RequiredFlags: callflag.NoneFlag,
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}
tn.meta.AddMethod(md, desc)
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desc = &manifest.Method{
Name: "callOtherContractNoReturn",
Parameters: []manifest.Parameter{
manifest.NewParameter("contractHash", smartcontract.Hash160Type),
manifest.NewParameter("method", smartcontract.StringType),
manifest.NewParameter("arg", smartcontract.ArrayType),
},
ReturnType: smartcontract.VoidType,
Safe: true,
}
md = &interop.MethodAndPrice{
Func: tn.callOtherContractNoReturn,
Price: testSumPrice,
RequiredFlags: callflag.NoneFlag}
tn.meta.AddMethod(md, desc)
desc = &manifest.Method{
Name: "callOtherContractWithReturn",
Parameters: []manifest.Parameter{
manifest.NewParameter("contractHash", smartcontract.Hash160Type),
manifest.NewParameter("method", smartcontract.StringType),
manifest.NewParameter("arg", smartcontract.ArrayType),
},
ReturnType: smartcontract.IntegerType,
}
md = &interop.MethodAndPrice{
Func: tn.callOtherContractWithReturn,
Price: testSumPrice,
RequiredFlags: callflag.NoneFlag}
tn.meta.AddMethod(md, desc)
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return tn
}
func (tn *testNative) sum(_ *interop.Context, args []stackitem.Item) stackitem.Item {
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s1, err := args[0].TryInteger()
if err != nil {
panic(err)
}
s2, err := args[1].TryInteger()
if err != nil {
panic(err)
}
return stackitem.NewBigInteger(s1.Add(s1, s2))
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}
func toUint160(item stackitem.Item) util.Uint160 {
bs, err := item.TryBytes()
if err != nil {
panic(err)
}
u, err := util.Uint160DecodeBytesBE(bs)
if err != nil {
panic(err)
}
return u
}
func (tn *testNative) call(ic *interop.Context, args []stackitem.Item, hasReturn bool) {
cs, err := ic.GetContract(toUint160(args[0]))
if err != nil {
panic(err)
}
bs, err := args[1].TryBytes()
if err != nil {
panic(err)
}
err = contract.CallFromNative(ic, tn.meta.Hash, cs, string(bs), args[2].Value().([]stackitem.Item), hasReturn)
if err != nil {
panic(err)
}
}
func (tn *testNative) callOtherContractNoReturn(ic *interop.Context, args []stackitem.Item) stackitem.Item {
tn.call(ic, args, false)
return stackitem.Null{}
}
func (tn *testNative) callOtherContractWithReturn(ic *interop.Context, args []stackitem.Item) stackitem.Item {
tn.call(ic, args, true)
bi := ic.VM.Estack().Pop().BigInt()
return stackitem.Make(bi.Add(bi, big.NewInt(1)))
}
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func TestNativeContract_Invoke(t *testing.T) {
chain := newTestChain(t)
defer chain.Close()
tn := newTestNative()
chain.registerNative(tn)
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err := chain.contracts.Management.PutContractState(chain.dao, &state.Contract{
ContractBase: state.ContractBase{
ID: 1,
NEF: tn.meta.NEF,
Hash: tn.meta.Hash,
Manifest: tn.meta.Manifest,
},
})
require.NoError(t, err)
// System.Contract.Call + "sum" itself + opcodes for pushing arguments.
price := int64(testSumPrice * 2)
price += 3 * fee.Opcode(chain.GetBaseExecFee(), opcode.PUSHINT8)
price += 2 * fee.Opcode(chain.GetBaseExecFee(), opcode.SYSCALL, opcode.PUSHDATA1, opcode.PUSHINT8)
price += fee.Opcode(chain.GetBaseExecFee(), opcode.PACK)
res, err := invokeContractMethod(chain, price, tn.Metadata().Hash, "sum", int64(14), int64(28))
require.NoError(t, err)
checkResult(t, res, stackitem.Make(42))
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require.NoError(t, chain.persist())
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select {
case index := <-tn.blocks:
require.Equal(t, chain.blockHeight, index)
default:
require.Fail(t, "onPersist wasn't called")
}
// Enough for Call and other opcodes, but not enough for "sum" call.
res, err = invokeContractMethod(chain, price-1, tn.Metadata().Hash, "sum", int64(14), int64(28))
require.NoError(t, err)
checkFAULTState(t, res)
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}
func TestNativeContract_InvokeInternal(t *testing.T) {
chain := newTestChain(t)
defer chain.Close()
tn := newTestNative()
chain.registerNative(tn)
err := chain.contracts.Management.PutContractState(chain.dao, &state.Contract{
ContractBase: state.ContractBase{
ID: 1,
NEF: tn.meta.NEF,
Manifest: tn.meta.Manifest,
},
})
require.NoError(t, err)
d := dao.NewSimple(storage.NewMemoryStore(), netmode.UnitTestNet, chain.config.StateRootInHeader)
ic := chain.newInteropContext(trigger.Application, d, nil, nil)
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v := ic.SpawnVM()
t.Run("fail, bad current script hash", func(t *testing.T) {
v.LoadScriptWithHash([]byte{1}, util.Uint160{1, 2, 3}, callflag.All)
v.Estack().PushVal(14)
v.Estack().PushVal(28)
v.Estack().PushVal("sum")
v.Estack().PushVal(tn.Metadata().Name)
// it's prohibited to call natives directly
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require.Error(t, native.Call(ic))
})
t.Run("success", func(t *testing.T) {
v.LoadScriptWithHash([]byte{1}, tn.Metadata().Hash, callflag.All)
v.Estack().PushVal(14)
v.Estack().PushVal(28)
v.Estack().PushVal("sum")
v.Estack().PushVal(tn.Metadata().ID)
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require.NoError(t, native.Call(ic))
value := v.Estack().Pop().BigInt()
require.Equal(t, int64(42), value.Int64())
})
}
func TestNativeContract_InvokeOtherContract(t *testing.T) {
chain := newTestChain(t)
defer chain.Close()
tn := newTestNative()
chain.registerNative(tn)
err := chain.contracts.Management.PutContractState(chain.dao, &state.Contract{
ContractBase: state.ContractBase{
ID: 1,
Hash: tn.meta.Hash,
NEF: tn.meta.NEF,
Manifest: tn.meta.Manifest,
},
})
require.NoError(t, err)
var drainTN = func(t *testing.T) {
select {
case <-tn.blocks:
default:
require.Fail(t, "testNative didn't send us block")
}
}
cs, _ := getTestContractState(chain)
require.NoError(t, chain.contracts.Management.PutContractState(chain.dao, cs))
t.Run("non-native, no return", func(t *testing.T) {
res, err := invokeContractMethod(chain, testSumPrice*4+10000, tn.Metadata().Hash, "callOtherContractNoReturn", cs.Hash, "justReturn", []interface{}{})
require.NoError(t, err)
drainTN(t)
require.Equal(t, vm.HaltState, res.VMState, res.FaultException)
checkResult(t, res, stackitem.Null{}) // simple call is done with EnsureNotEmpty
})
t.Run("non-native, with return", func(t *testing.T) {
res, err := invokeContractMethod(chain, testSumPrice*4+10000, tn.Metadata().Hash,
"callOtherContractWithReturn", cs.Hash, "ret7", []interface{}{})
require.NoError(t, err)
drainTN(t)
checkResult(t, res, stackitem.Make(8))
})
}