smartcontract: provide interface{}->Parameter conversion
Which is almost like a NeoFS's toStackParameter() on steroids (except it doesn't mess with noderoles package, it can be casted to int). RPC client's Invoke* functions expect Parameters, so make it easy to create them.
This commit is contained in:
Roman Khimov
parent
a8a2f2ed5a
commit
92a931c145
2 changed files with 260 additions and 0 deletions
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@ -255,6 +255,101 @@ func NewParameterFromString(in string) (*Parameter, error) {
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return res, nil
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}
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// NewParameterFromValue infers Parameter type from the value given and adjusts
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// the value if needed. It does not copy the value if it can avoid doing so. All
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// regular integers, util.*, keys.PublicKey*, string and bool types are supported,
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// slice of byte slices is accepted and converted as well.
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func NewParameterFromValue(value interface{}) (Parameter, error) {
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var result = Parameter{
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Value: value,
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}
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switch v := value.(type) {
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case []byte:
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result.Type = ByteArrayType
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case string:
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result.Type = StringType
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case bool:
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result.Type = BoolType
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case *big.Int:
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result.Type = IntegerType
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case int8:
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result.Type = IntegerType
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result.Value = big.NewInt(int64(v))
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case byte:
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result.Type = IntegerType
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result.Value = big.NewInt(int64(v))
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case int16:
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result.Type = IntegerType
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result.Value = big.NewInt(int64(v))
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case uint16:
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result.Type = IntegerType
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result.Value = big.NewInt(int64(v))
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case int32:
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result.Type = IntegerType
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result.Value = big.NewInt(int64(v))
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case uint32:
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result.Type = IntegerType
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result.Value = big.NewInt(int64(v))
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case int:
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result.Type = IntegerType
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result.Value = big.NewInt(int64(v))
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case uint:
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result.Type = IntegerType
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result.Value = new(big.Int).SetUint64(uint64(v))
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case int64:
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result.Type = IntegerType
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result.Value = big.NewInt(v)
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case uint64:
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result.Type = IntegerType
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result.Value = new(big.Int).SetUint64(v)
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case util.Uint160:
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result.Type = Hash160Type
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case util.Uint256:
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result.Type = Hash256Type
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case keys.PublicKey:
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return NewParameterFromValue(&v)
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case *keys.PublicKey:
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result.Type = PublicKeyType
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result.Value = v.Bytes()
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case [][]byte:
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arr := make([]Parameter, 0, len(v))
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for i := range v {
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// We know the type exactly, so error is not possible.
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elem, _ := NewParameterFromValue(v[i])
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arr = append(arr, elem)
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}
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result.Type = ArrayType
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result.Value = arr
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case []*keys.PublicKey:
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return NewParameterFromValue(keys.PublicKeys(v))
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case keys.PublicKeys:
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arr := make([]Parameter, 0, len(v))
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for i := range v {
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// We know the type exactly, so error is not possible.
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elem, _ := NewParameterFromValue(v[i])
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arr = append(arr, elem)
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}
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result.Type = ArrayType
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result.Value = arr
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case []interface{}:
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arr := make([]Parameter, 0, len(v))
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for i := range v {
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elem, err := NewParameterFromValue(v[i])
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if err != nil {
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return result, err
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}
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arr = append(arr, elem)
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}
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result.Type = ArrayType
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result.Value = arr
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default:
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return result, fmt.Errorf("unsupported parameter %T", value)
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}
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return result, nil
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}
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// ExpandParameterToEmitable converts a parameter to a type which can be handled as
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// an array item by emit.Array. It correlates with the way an RPC server handles
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// FuncParams for invoke* calls inside the request.ExpandArrayIntoScript function.
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@ -527,3 +527,168 @@ func TestExpandParameterToEmitable(t *testing.T) {
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require.Error(t, err)
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}
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}
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func TestParameterFromValue(t *testing.T) {
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pk1, _ := keys.NewPrivateKey()
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pk2, _ := keys.NewPrivateKey()
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items := []struct {
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value interface{}
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expType ParamType
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expVal interface{}
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}{
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{
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value: []byte{1, 2, 3},
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expType: ByteArrayType,
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expVal: []byte{1, 2, 3},
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},
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{
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value: "hello world",
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expType: StringType,
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expVal: "hello world",
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},
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{
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value: false,
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expType: BoolType,
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expVal: false,
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},
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{
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value: true,
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expType: BoolType,
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expVal: true,
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},
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{
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value: big.NewInt(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: byte(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: int8(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: uint8(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: int16(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: uint16(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: int32(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: uint32(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: 100,
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: uint(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: int64(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: uint64(100),
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expType: IntegerType,
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expVal: big.NewInt(100),
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},
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{
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value: util.Uint160{1, 2, 3},
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expType: Hash160Type,
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expVal: util.Uint160{1, 2, 3},
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},
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{
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value: util.Uint256{3, 2, 1},
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expType: Hash256Type,
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expVal: util.Uint256{3, 2, 1},
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},
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{
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value: pk1.PublicKey(),
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expType: PublicKeyType,
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expVal: pk1.PublicKey().Bytes(),
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},
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{
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value: *pk2.PublicKey(),
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expType: PublicKeyType,
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expVal: pk2.PublicKey().Bytes(),
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},
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{
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value: [][]byte{{1, 2, 3}, {3, 2, 1}},
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expType: ArrayType,
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expVal: []Parameter{{ByteArrayType, []byte{1, 2, 3}}, {ByteArrayType, []byte{3, 2, 1}}},
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},
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{
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value: []*keys.PublicKey{pk1.PublicKey(), pk2.PublicKey()},
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expType: ArrayType,
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expVal: []Parameter{{
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Type: PublicKeyType,
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Value: pk1.PublicKey().Bytes(),
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}, {
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Type: PublicKeyType,
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Value: pk2.PublicKey().Bytes(),
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}},
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},
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{
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value: keys.PublicKeys{pk1.PublicKey(), pk2.PublicKey()},
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expType: ArrayType,
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expVal: []Parameter{{
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Type: PublicKeyType,
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Value: pk1.PublicKey().Bytes(),
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}, {
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Type: PublicKeyType,
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Value: pk2.PublicKey().Bytes(),
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}},
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},
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{
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value: []interface{}{-42, "random", []byte{1, 2, 3}},
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expType: ArrayType,
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expVal: []Parameter{{
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Type: IntegerType,
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Value: big.NewInt(-42),
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}, {
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Type: StringType,
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Value: "random",
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}, {
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Type: ByteArrayType,
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Value: []byte{1, 2, 3},
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}},
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},
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}
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for _, item := range items {
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t.Run(item.expType.String()+" to stack parameter", func(t *testing.T) {
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res, err := NewParameterFromValue(item.value)
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require.NoError(t, err)
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require.Equal(t, item.expType, res.Type)
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require.Equal(t, item.expVal, res.Value)
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})
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}
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_, err := NewParameterFromValue(make(map[string]int))
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require.Error(t, err)
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_, err = NewParameterFromValue([]interface{}{1, 2, make(map[string]int)})
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require.Error(t, err)
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}
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