neo-go/pkg/core/native_oracle_test.go

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package core
import (
"errors"
"math/big"
"testing"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
"github.com/nspcc-dev/neo-go/pkg/core/block"
"github.com/nspcc-dev/neo-go/pkg/core/interop/interopnames"
"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/transaction"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/internal/testchain"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"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/emit"
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"github.com/stretchr/testify/require"
)
// getTestContractState returns test contract which uses oracles.
func getOracleContractState(h util.Uint160) *state.Contract {
w := io.NewBufBinWriter()
emit.Int(w.BinWriter, 5)
emit.Opcodes(w.BinWriter, opcode.PACK)
emit.String(w.BinWriter, "request")
emit.Bytes(w.BinWriter, h.BytesBE())
emit.Syscall(w.BinWriter, interopnames.SystemContractCall)
emit.Opcodes(w.BinWriter, opcode.RET)
// `handle` method aborts if len(userData) == 2
offset := w.Len()
emit.Opcodes(w.BinWriter, opcode.OVER)
emit.Opcodes(w.BinWriter, opcode.SIZE)
emit.Int(w.BinWriter, 2)
emit.Instruction(w.BinWriter, opcode.JMPNE, []byte{3})
emit.Opcodes(w.BinWriter, opcode.ABORT)
emit.Int(w.BinWriter, 4) // url, userData, code, result
emit.Opcodes(w.BinWriter, opcode.PACK)
emit.Syscall(w.BinWriter, interopnames.SystemBinarySerialize)
emit.String(w.BinWriter, "lastOracleResponse")
emit.Syscall(w.BinWriter, interopnames.SystemStorageGetContext)
emit.Syscall(w.BinWriter, interopnames.SystemStoragePut)
emit.Opcodes(w.BinWriter, opcode.RET)
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m := manifest.NewManifest(h, "TestOracle")
m.ABI.Methods = []manifest.Method{
{
Name: "requestURL",
Offset: 0,
Parameters: []manifest.Parameter{
manifest.NewParameter("url", smartcontract.StringType),
manifest.NewParameter("filter", smartcontract.StringType),
manifest.NewParameter("callback", smartcontract.StringType),
manifest.NewParameter("userData", smartcontract.AnyType),
manifest.NewParameter("gasForResponse", smartcontract.IntegerType),
},
ReturnType: smartcontract.VoidType,
},
{
Name: "handle",
Offset: offset,
Parameters: []manifest.Parameter{
manifest.NewParameter("url", smartcontract.StringType),
manifest.NewParameter("userData", smartcontract.AnyType),
manifest.NewParameter("code", smartcontract.IntegerType),
manifest.NewParameter("result", smartcontract.ByteArrayType),
},
ReturnType: smartcontract.VoidType,
},
}
perm := manifest.NewPermission(manifest.PermissionHash, h)
perm.Methods.Add("request")
m.Permissions = append(m.Permissions, *perm)
return &state.Contract{
Script: w.Bytes(),
Manifest: *m,
ID: 42,
}
}
func putOracleRequest(t *testing.T, h util.Uint160, bc *Blockchain,
url string, filter *string, userData []byte, gas int64) util.Uint256 {
w := io.NewBufBinWriter()
var filtItem interface{}
if filter != nil {
filtItem = *filter
}
emit.AppCallWithOperationAndArgs(w.BinWriter, h, "requestURL",
url, filtItem, "handle", userData, gas)
require.NoError(t, w.Err)
gas += 50_000_000 + 5_000_000 // request + contract call with args
tx := transaction.New(netmode.UnitTestNet, w.Bytes(), gas)
tx.ValidUntilBlock = bc.BlockHeight() + 1
tx.NetworkFee = 1_000_000
setSigner(tx, testchain.MultisigScriptHash())
require.NoError(t, signTx(bc, tx))
require.NoError(t, bc.AddBlock(bc.newBlock(tx)))
return tx.Hash()
}
func TestOracle_Request(t *testing.T) {
bc := newTestChain(t)
defer bc.Close()
orc := bc.contracts.Oracle
cs := getOracleContractState(orc.Hash)
require.NoError(t, bc.dao.PutContractState(cs))
gasForResponse := int64(2000_1234)
var filter = "flt"
userData := []byte("custom info")
txHash := putOracleRequest(t, cs.ScriptHash(), bc, "url", &filter, userData, gasForResponse)
req, err := orc.GetRequestInternal(bc.dao, 1)
require.NotNil(t, req)
require.NoError(t, err)
require.Equal(t, txHash, req.OriginalTxID)
require.Equal(t, "url", req.URL)
require.Equal(t, filter, *req.Filter)
require.Equal(t, cs.ScriptHash(), req.CallbackContract)
require.Equal(t, "handle", req.CallbackMethod)
require.Equal(t, uint64(gasForResponse), req.GasForResponse)
idList, err := orc.GetIDListInternal(bc.dao, "url")
require.NoError(t, err)
require.Equal(t, &native.IDList{1}, idList)
// Finish.
priv, err := keys.NewPrivateKey()
require.NoError(t, err)
pub := priv.PublicKey()
tx := transaction.New(netmode.UnitTestNet, []byte{}, 0)
bl := block.New(netmode.UnitTestNet, bc.config.StateRootInHeader)
bl.Index = bc.BlockHeight() + 1
setSigner(tx, testchain.CommitteeScriptHash())
ic := bc.newInteropContext(trigger.Application, bc.dao, bl, tx)
ic.SpawnVM()
ic.VM.LoadScript([]byte{byte(opcode.RET)})
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err = bc.contracts.Designate.DesignateAsRole(ic, native.RoleOracle, keys.PublicKeys{pub})
require.NoError(t, err)
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require.NoError(t, bc.contracts.Designate.OnPersistEnd(ic.DAO))
tx = transaction.New(netmode.UnitTestNet, native.GetOracleResponseScript(), 0)
ic.Tx = tx
ic.Block = bc.newBlock(tx)
err = orc.FinishInternal(ic)
require.True(t, errors.Is(err, native.ErrResponseNotFound), "got: %v", err)
resp := &transaction.OracleResponse{
ID: 13,
Code: transaction.Success,
Result: []byte{4, 8, 15, 16, 23, 42},
}
tx.Attributes = []transaction.Attribute{{
Type: transaction.OracleResponseT,
Value: resp,
}}
err = orc.FinishInternal(ic)
require.True(t, errors.Is(err, native.ErrRequestNotFound), "got: %v", err)
// We need to ensure that callback is called thus, executing full script is necessary.
resp.ID = 1
ic.VM.LoadScriptWithFlags(tx.Script, smartcontract.All)
require.NoError(t, ic.VM.Run())
si := ic.DAO.GetStorageItem(cs.ID, []byte("lastOracleResponse"))
require.NotNil(t, si)
item, err := stackitem.DeserializeItem(si.Value)
require.NoError(t, err)
arr, ok := item.Value().([]stackitem.Item)
require.True(t, ok)
require.Equal(t, []byte("url"), arr[0].Value())
require.Equal(t, userData, arr[1].Value())
require.Equal(t, big.NewInt(int64(resp.Code)), arr[2].Value())
require.Equal(t, resp.Result, arr[3].Value())
// Check that processed request is removed during `postPersist`.
_, err = orc.GetRequestInternal(ic.DAO, 1)
require.NoError(t, err)
require.NoError(t, orc.PostPersist(ic))
_, err = orc.GetRequestInternal(ic.DAO, 1)
require.Error(t, err)
t.Run("ErrorOnFinish", func(t *testing.T) {
const reqID = 2
putOracleRequest(t, cs.ScriptHash(), bc, "url", nil, []byte{1, 2}, gasForResponse)
_, err := orc.GetRequestInternal(bc.dao, reqID) // ensure ID is 2
require.NoError(t, err)
tx = transaction.New(netmode.UnitTestNet, native.GetOracleResponseScript(), 0)
tx.Attributes = []transaction.Attribute{{
Type: transaction.OracleResponseT,
Value: &transaction.OracleResponse{
ID: reqID,
Code: transaction.Success,
Result: []byte{4, 8, 15, 16, 23, 42},
},
}}
ic := bc.newInteropContext(trigger.Application, bc.dao, bc.newBlock(tx), tx)
ic.VM = ic.SpawnVM()
ic.VM.LoadScriptWithFlags(tx.Script, smartcontract.All)
require.Error(t, ic.VM.Run())
// Request is cleaned up even if callback failed.
require.NoError(t, orc.PostPersist(ic))
_, err = orc.GetRequestInternal(ic.DAO, reqID)
require.Error(t, err)
})
t.Run("BadRequest", func(t *testing.T) {
var doBadRequest = func(t *testing.T, h util.Uint160, url string, filter *string, userData []byte, gas int64) {
txHash := putOracleRequest(t, h, bc, url, filter, userData, gas)
aer, err := bc.GetAppExecResults(txHash, trigger.Application)
require.NoError(t, err)
require.Equal(t, 1, len(aer))
require.Equal(t, vm.FaultState, aer[0].VMState)
}
t.Run("non-UTF8 url", func(t *testing.T) {
doBadRequest(t, cs.ScriptHash(), "\xff", nil, []byte{1, 2}, gasForResponse)
})
t.Run("non-UTF8 filter", func(t *testing.T) {
var f = "\xff"
doBadRequest(t, cs.ScriptHash(), "url", &f, []byte{1, 2}, gasForResponse)
})
t.Run("not enough gas", func(t *testing.T) {
doBadRequest(t, cs.ScriptHash(), "url", nil, nil, 1000)
})
})
}