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Merge pull request #1722 from nspcc-dev/fix/nep11

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smartcontract: add NEP-11 standard check
This commit is contained in:
Roman Khimov 2021-02-22 22:27:09 +03:00 committed by GitHub
commit abee3b5b05
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GPG key ID: 4AEE18F83AFDEB23
12 changed files with 491 additions and 106 deletions
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41
pkg/compiler/compiler.go
View file

@ -222,13 +222,39 @@ func CompileAndSave(src string, o *Options) ([]byte, error) {
}
if o.ManifestFile != "" {
m, err := CreateManifest(di, o)
if err != nil {
return b, err
}
mData, err := json.Marshal(m)
if err != nil {
return b, fmt.Errorf("failed to marshal manifest to JSON: %w", err)
}
return b, ioutil.WriteFile(o.ManifestFile, mData, os.ModePerm)
}
return b, nil
}
// CreateManifest creates manifest and checks that is is valid.
func CreateManifest(di *DebugInfo, o *Options) (*manifest.Manifest, error) {
m, err := di.ConvertToManifest(o)
if err != nil {
return b, fmt.Errorf("failed to convert debug info to manifest: %w", err)
return m, fmt.Errorf("failed to convert debug info to manifest: %w", err)
}
if !o.NoStandardCheck {
if err := standard.Check(m, o.ContractSupportedStandards...); err != nil {
return b, err
if err := standard.CheckABI(m, o.ContractSupportedStandards...); err != nil {
return m, err
}
if m.ABI.GetMethod(manifest.MethodOnNEP11Payment, -1) != nil {
if err := standard.CheckABI(m, manifest.NEP11Payable); err != nil {
return m, err
}
}
if m.ABI.GetMethod(manifest.MethodOnNEP17Payment, -1) != nil {
if err := standard.CheckABI(m, manifest.NEP17Payable); err != nil {
return m, err
}
}
}
if !o.NoEventsCheck {
@ -253,12 +279,5 @@ func CompileAndSave(src string, o *Options) ([]byte, error) {
}
}
}
mData, err := json.Marshal(m)
if err != nil {
return b, fmt.Errorf("failed to marshal manifest to JSON: %w", err)
}
return b, ioutil.WriteFile(o.ManifestFile, mData, os.ModePerm)
}
return b, nil
return m, nil
}

35
pkg/compiler/compiler_test.go
View file

@ -4,6 +4,7 @@ import (
"io/ioutil"
"os"
"path"
"strings"
"testing"
"github.com/nspcc-dev/neo-go/pkg/compiler"
@ -90,3 +91,37 @@ func compileFile(src string) error {
_, err := compiler.Compile(src, nil)
return err
}
func TestOnPayableChecks(t *testing.T) {
compileAndCheck := func(t *testing.T, src string) error {
_, di, err := compiler.CompileWithDebugInfo("payable", strings.NewReader(src))
require.NoError(t, err)
_, err = compiler.CreateManifest(di, &compiler.Options{})
return err
}
t.Run("NEP-11, good", func(t *testing.T) {
src := `package payable
import "github.com/nspcc-dev/neo-go/pkg/interop"
func OnNEP11Payment(from interop.Hash160, amount int, tokenID []byte) {}`
require.NoError(t, compileAndCheck(t, src))
})
t.Run("NEP-11, bad", func(t *testing.T) {
src := `package payable
import "github.com/nspcc-dev/neo-go/pkg/interop"
func OnNEP11Payment(from interop.Hash160, amount int, oldParam string, tokenID []byte) {}`
require.Error(t, compileAndCheck(t, src))
})
t.Run("NEP-17, good", func(t *testing.T) {
src := `package payable
import "github.com/nspcc-dev/neo-go/pkg/interop"
func OnNEP17Payment(from interop.Hash160, amount int, data interface{}) {}`
require.NoError(t, compileAndCheck(t, src))
})
t.Run("NEP-17, bad", func(t *testing.T) {
src := `package payable
import "github.com/nspcc-dev/neo-go/pkg/interop"
func OnNEP17Payment(from interop.Hash160, amount int, data interface{}, extra int) {}`
require.Error(t, compileAndCheck(t, src))
})
}

7
pkg/core/native/name_service_test.go
View file

@ -3,6 +3,8 @@ package native
import (
"testing"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest/standard"
"github.com/stretchr/testify/require"
)
@ -86,3 +88,8 @@ func TestNameService_CheckName(t *testing.T) {
}
}
}
func TestNameService_NEP11(t *testing.T) {
ns := newNameService()
require.NoError(t, standard.Check(&ns.Manifest, manifest.NEP11StandardName))
}

14
pkg/core/native/nonfungible_test.go Normal file
View file

@ -0,0 +1,14 @@
package native
import (
"testing"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest/standard"
"github.com/stretchr/testify/require"
)
func TestNonfungibleNEP11(t *testing.T) {
n := newNonFungible("NFToken", -100, "SYM", 1)
require.NoError(t, standard.Check(&n.ContractMD.Manifest, manifest.NEP11StandardName))
}

6
pkg/smartcontract/manifest/manifest.go
View file

@ -16,8 +16,14 @@ const (
// NEP10StandardName represents the name of NEP10 smartcontract standard.
NEP10StandardName = "NEP-10"
// NEP11StandardName represents the name of NEP11 smartcontract standard.
NEP11StandardName = "NEP-11"
// NEP17StandardName represents the name of NEP17 smartcontract standard.
NEP17StandardName = "NEP-17"
// NEP11Payable represents the name of contract interface which can receive NEP-11 tokens.
NEP11Payable = "NEP-11-Payable"
// NEP17Payable represents the name of contract interface which can receive NEP-17 tokens.
NEP17Payable = "NEP-17-Payable"
)
// Manifest represens contract metadata.

15
pkg/smartcontract/manifest/standard/check.go Normal file
View file

@ -0,0 +1,15 @@
package standard
import "github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
// Standard represents smart-contract standard.
type Standard struct {
// Manifest describes mandatory methods and events.
manifest.Manifest
// Base contains base standard.
Base *Standard
// Optional contains optional contract methods.
// If contract contains method with the same name and parameter count,
// it must have signature declared by this contract.
Optional []manifest.Method
}

100
pkg/smartcontract/manifest/standard/comply.go
View file

@ -13,21 +13,40 @@ var (
ErrEventMissing = errors.New("event missing")
ErrInvalidReturnType = errors.New("invalid return type")
ErrInvalidParameterCount = errors.New("invalid parameter count")
ErrInvalidParameterName = errors.New("invalid parameter name")
ErrInvalidParameterType = errors.New("invalid parameter type")
ErrSafeMethodMismatch = errors.New("method has wrong safe flag")
)
var checks = map[string]*manifest.Manifest{
manifest.NEP17StandardName: nep17,
var checks = map[string][]*Standard{
manifest.NEP11StandardName: {nep11NonDivisible, nep11Divisible},
manifest.NEP17StandardName: {nep17},
manifest.NEP11Payable: {nep11payable},
manifest.NEP17Payable: {nep17payable},
}
// Check checks if manifest complies with all provided standards.
// Currently only NEP-17 is supported.
func Check(m *manifest.Manifest, standards ...string) error {
return check(m, true, standards...)
}
// CheckABI is similar to Check but doesn't check parameter names.
func CheckABI(m *manifest.Manifest, standards ...string) error {
return check(m, false, standards...)
}
func check(m *manifest.Manifest, checkNames bool, standards ...string) error {
for i := range standards {
s, ok := checks[standards[i]]
ss, ok := checks[standards[i]]
if ok {
if err := Comply(m, s); err != nil {
var err error
for i := range ss {
if err = comply(m, checkNames, ss[i]); err == nil {
break
}
}
if err != nil {
return fmt.Errorf("manifest is not compliant with '%s': %w", standards[i], err)
}
}
@ -37,24 +56,24 @@ func Check(m *manifest.Manifest, standards ...string) error {
// Comply if m has all methods and event from st manifest and they have the same signature.
// Parameter names are ignored.
func Comply(m, st *manifest.Manifest) error {
func Comply(m *manifest.Manifest, st *Standard) error {
return comply(m, true, st)
}
// ComplyABI is similar to comply but doesn't check parameter names.
func ComplyABI(m *manifest.Manifest, st *Standard) error {
return comply(m, false, st)
}
func comply(m *manifest.Manifest, checkNames bool, st *Standard) error {
if st.Base != nil {
if err := comply(m, checkNames, st.Base); err != nil {
return err
}
}
for _, stm := range st.ABI.Methods {
name := stm.Name
md := m.ABI.GetMethod(name, len(stm.Parameters))
if md == nil {
return fmt.Errorf("%w: '%s' with %d parameters", ErrMethodMissing, name, len(stm.Parameters))
} else if stm.ReturnType != md.ReturnType {
return fmt.Errorf("%w: '%s' (expected %s, got %s)", ErrInvalidReturnType,
name, stm.ReturnType, md.ReturnType)
}
for i := range stm.Parameters {
if stm.Parameters[i].Type != md.Parameters[i].Type {
return fmt.Errorf("%w: '%s'[%d] (expected %s, got %s)", ErrInvalidParameterType,
name, i, stm.Parameters[i].Type, md.Parameters[i].Type)
}
}
if stm.Safe != md.Safe {
return fmt.Errorf("%w: expected %t", ErrSafeMethodMismatch, stm.Safe)
if err := checkMethod(m, &stm, false, checkNames); err != nil {
return err
}
}
for _, ste := range st.ABI.Events {
@ -67,11 +86,50 @@ func Comply(m, st *manifest.Manifest) error {
name, len(ste.Parameters), len(ed.Parameters))
}
for i := range ste.Parameters {
if checkNames && ste.Parameters[i].Name != ed.Parameters[i].Name {
return fmt.Errorf("%w: event '%s'[%d] (expected %s, got %s)", ErrInvalidParameterName,
name, i, ste.Parameters[i].Name, ed.Parameters[i].Name)
}
if ste.Parameters[i].Type != ed.Parameters[i].Type {
return fmt.Errorf("%w: event '%s' (expected %s, got %s)", ErrInvalidParameterType,
name, ste.Parameters[i].Type, ed.Parameters[i].Type)
}
}
}
for _, stm := range st.Optional {
if err := checkMethod(m, &stm, true, checkNames); err != nil {
return err
}
}
return nil
}
func checkMethod(m *manifest.Manifest, expected *manifest.Method,
allowMissing bool, checkNames bool) error {
actual := m.ABI.GetMethod(expected.Name, len(expected.Parameters))
if actual == nil {
if allowMissing {
return nil
}
return fmt.Errorf("%w: '%s' with %d parameters", ErrMethodMissing,
expected.Name, len(expected.Parameters))
}
if expected.ReturnType != actual.ReturnType {
return fmt.Errorf("%w: '%s' (expected %s, got %s)", ErrInvalidReturnType,
expected.Name, expected.ReturnType, actual.ReturnType)
}
for i := range expected.Parameters {
if checkNames && expected.Parameters[i].Name != actual.Parameters[i].Name {
return fmt.Errorf("%w: '%s'[%d] (expected %s, got %s)", ErrInvalidParameterName,
expected.Name, i, expected.Parameters[i].Name, actual.Parameters[i].Name)
}
if expected.Parameters[i].Type != actual.Parameters[i].Type {
return fmt.Errorf("%w: '%s'[%d] (expected %s, got %s)", ErrInvalidParameterType,
expected.Name, i, expected.Parameters[i].Type, actual.Parameters[i].Type)
}
}
if expected.Safe != actual.Safe {
return fmt.Errorf("%w: expected %t", ErrSafeMethodMismatch, expected.Safe)
}
return nil
}

79
pkg/smartcontract/manifest/standard/comply_test.go
View file

@ -38,14 +38,14 @@ func fooMethodBarEvent() *manifest.Manifest {
func TestComplyMissingMethod(t *testing.T) {
m := fooMethodBarEvent()
m.ABI.GetMethod("foo", -1).Name = "notafoo"
err := Comply(m, fooMethodBarEvent())
err := Comply(m, &Standard{Manifest: *fooMethodBarEvent()})
require.True(t, errors.Is(err, ErrMethodMissing))
}
func TestComplyInvalidReturnType(t *testing.T) {
m := fooMethodBarEvent()
m.ABI.GetMethod("foo", -1).ReturnType = smartcontract.VoidType
err := Comply(m, fooMethodBarEvent())
err := Comply(m, &Standard{Manifest: *fooMethodBarEvent()})
require.True(t, errors.Is(err, ErrInvalidReturnType))
}
@ -54,14 +54,14 @@ func TestComplyMethodParameterCount(t *testing.T) {
m := fooMethodBarEvent()
f := m.ABI.GetMethod("foo", -1)
f.Parameters = append(f.Parameters, manifest.Parameter{Type: smartcontract.BoolType})
err := Comply(m, fooMethodBarEvent())
err := Comply(m, &Standard{Manifest: *fooMethodBarEvent()})
require.True(t, errors.Is(err, ErrMethodMissing))
})
t.Run("Event", func(t *testing.T) {
m := fooMethodBarEvent()
ev := m.ABI.GetEvent("bar")
ev.Parameters = append(ev.Parameters[:0])
err := Comply(m, fooMethodBarEvent())
err := Comply(m, &Standard{Manifest: *fooMethodBarEvent()})
require.True(t, errors.Is(err, ErrInvalidParameterCount))
})
}
@ -70,28 +70,47 @@ func TestComplyParameterType(t *testing.T) {
t.Run("Method", func(t *testing.T) {
m := fooMethodBarEvent()
m.ABI.GetMethod("foo", -1).Parameters[0].Type = smartcontract.InteropInterfaceType
err := Comply(m, fooMethodBarEvent())
err := Comply(m, &Standard{Manifest: *fooMethodBarEvent()})
require.True(t, errors.Is(err, ErrInvalidParameterType))
})
t.Run("Event", func(t *testing.T) {
m := fooMethodBarEvent()
m.ABI.GetEvent("bar").Parameters[0].Type = smartcontract.InteropInterfaceType
err := Comply(m, fooMethodBarEvent())
err := Comply(m, &Standard{Manifest: *fooMethodBarEvent()})
require.True(t, errors.Is(err, ErrInvalidParameterType))
})
}
func TestComplyParameterName(t *testing.T) {
t.Run("Method", func(t *testing.T) {
m := fooMethodBarEvent()
m.ABI.GetMethod("foo", -1).Parameters[0].Name = "hehe"
s := &Standard{Manifest: *fooMethodBarEvent()}
err := Comply(m, s)
require.True(t, errors.Is(err, ErrInvalidParameterName))
require.NoError(t, ComplyABI(m, s))
})
t.Run("Event", func(t *testing.T) {
m := fooMethodBarEvent()
m.ABI.GetEvent("bar").Parameters[0].Name = "hehe"
s := &Standard{Manifest: *fooMethodBarEvent()}
err := Comply(m, s)
require.True(t, errors.Is(err, ErrInvalidParameterName))
require.NoError(t, ComplyABI(m, s))
})
}
func TestMissingEvent(t *testing.T) {
m := fooMethodBarEvent()
m.ABI.GetEvent("bar").Name = "notabar"
err := Comply(m, fooMethodBarEvent())
err := Comply(m, &Standard{Manifest: *fooMethodBarEvent()})
require.True(t, errors.Is(err, ErrEventMissing))
}
func TestSafeFlag(t *testing.T) {
m := fooMethodBarEvent()
m.ABI.GetMethod("foo", -1).Safe = false
err := Comply(m, fooMethodBarEvent())
err := Comply(m, &Standard{Manifest: *fooMethodBarEvent()})
require.True(t, errors.Is(err, ErrSafeMethodMismatch))
}
@ -109,12 +128,52 @@ func TestComplyValid(t *testing.T) {
Type: smartcontract.IntegerType,
}},
})
require.NoError(t, Comply(m, fooMethodBarEvent()))
require.NoError(t, Comply(m, &Standard{Manifest: *fooMethodBarEvent()}))
}
func TestCheck(t *testing.T) {
m := manifest.NewManifest("Test")
require.Error(t, Check(m, manifest.NEP17StandardName))
require.NoError(t, Check(nep17, manifest.NEP17StandardName))
m.ABI.Methods = append(m.ABI.Methods, decimalTokenBase.ABI.Methods...)
m.ABI.Methods = append(m.ABI.Methods, nep17.ABI.Methods...)
m.ABI.Events = append(m.ABI.Events, nep17.ABI.Events...)
require.NoError(t, Check(m, manifest.NEP17StandardName))
require.NoError(t, CheckABI(m, manifest.NEP17StandardName))
}
func TestOptional(t *testing.T) {
var m Standard
m.Optional = []manifest.Method{{
Name: "optMet",
Parameters: []manifest.Parameter{{Type: smartcontract.ByteArrayType}},
ReturnType: smartcontract.IntegerType,
}}
t.Run("wrong parameter count, do not check", func(t *testing.T) {
var actual manifest.Manifest
actual.ABI.Methods = []manifest.Method{{
Name: "optMet",
ReturnType: smartcontract.IntegerType,
}}
require.NoError(t, Comply(&actual, &m))
})
t.Run("good parameter count, bad return", func(t *testing.T) {
var actual manifest.Manifest
actual.ABI.Methods = []manifest.Method{{
Name: "optMet",
Parameters: []manifest.Parameter{{Type: smartcontract.ArrayType}},
ReturnType: smartcontract.IntegerType,
}}
require.Error(t, Comply(&actual, &m))
})
t.Run("good parameter count, good return", func(t *testing.T) {
var actual manifest.Manifest
actual.ABI.Methods = []manifest.Method{{
Name: "optMet",
Parameters: []manifest.Parameter{{Type: smartcontract.ByteArrayType}},
ReturnType: smartcontract.IntegerType,
}}
require.NoError(t, Comply(&actual, &m))
})
}

121
pkg/smartcontract/manifest/standard/nep11.go Normal file
View file

@ -0,0 +1,121 @@
package standard
import (
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
)
var nep11Base = &Standard{
Base: decimalTokenBase,
Manifest: manifest.Manifest{
ABI: manifest.ABI{
Methods: []manifest.Method{
{
Name: "balanceOf",
Parameters: []manifest.Parameter{
{Name: "owner", Type: smartcontract.Hash160Type},
},
ReturnType: smartcontract.IntegerType,
Safe: true,
},
{
Name: "tokensOf",
ReturnType: smartcontract.AnyType, // Iterator
Parameters: []manifest.Parameter{
{Name: "owner", Type: smartcontract.Hash160Type},
},
Safe: true,
},
{
Name: "transfer",
Parameters: []manifest.Parameter{
{Name: "to", Type: smartcontract.Hash160Type},
{Name: "tokenId", Type: smartcontract.ByteArrayType},
},
ReturnType: smartcontract.BoolType,
},
},
Events: []manifest.Event{
{
Name: "Transfer",
Parameters: []manifest.Parameter{
{Name: "from", Type: smartcontract.Hash160Type},
{Name: "to", Type: smartcontract.Hash160Type},
{Name: "amount", Type: smartcontract.IntegerType},
{Name: "tokenId", Type: smartcontract.ByteArrayType},
},
},
},
},
},
Optional: []manifest.Method{
{
Name: "properties",
Parameters: []manifest.Parameter{
{Name: "tokenId", Type: smartcontract.ByteArrayType},
},
ReturnType: smartcontract.MapType,
Safe: true,
},
{
Name: "tokens",
ReturnType: smartcontract.AnyType,
Safe: true,
},
},
}
var nep11NonDivisible = &Standard{
Base: nep11Base,
Manifest: manifest.Manifest{
ABI: manifest.ABI{
Methods: []manifest.Method{
{
Name: "ownerOf",
Parameters: []manifest.Parameter{
{Name: "tokenId", Type: smartcontract.ByteArrayType},
},
ReturnType: smartcontract.Hash160Type,
Safe: true,
},
},
},
},
}
var nep11Divisible = &Standard{
Base: nep11Base,
Manifest: manifest.Manifest{
ABI: manifest.ABI{
Methods: []manifest.Method{
{
Name: "balanceOf",
Parameters: []manifest.Parameter{
{Name: "owner", Type: smartcontract.Hash160Type},
{Name: "tokenId", Type: smartcontract.ByteArrayType},
},
ReturnType: smartcontract.IntegerType,
Safe: true,
},
{
Name: "ownerOf",
Parameters: []manifest.Parameter{
{Name: "tokenId", Type: smartcontract.ByteArrayType},
},
ReturnType: smartcontract.AnyType,
Safe: true,
},
{
Name: "transfer",
Parameters: []manifest.Parameter{
{Name: "from", Type: smartcontract.Hash160Type},
{Name: "to", Type: smartcontract.Hash160Type},
{Name: "amount", Type: smartcontract.IntegerType},
{Name: "tokenId", Type: smartcontract.ByteArrayType},
},
ReturnType: smartcontract.BoolType,
},
},
},
},
}

41
pkg/smartcontract/manifest/standard/nep17.go
View file

@ -5,39 +5,26 @@ import (
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
)
var nep17 = &manifest.Manifest{
var nep17 = &Standard{
Base: decimalTokenBase,
Manifest: manifest.Manifest{
ABI: manifest.ABI{
Methods: []manifest.Method{
{
Name: "balanceOf",
Parameters: []manifest.Parameter{
{Type: smartcontract.Hash160Type},
{Name: "account", Type: smartcontract.Hash160Type},
},
ReturnType: smartcontract.IntegerType,
Safe: true,
},
{
Name: "decimals",
ReturnType: smartcontract.IntegerType,
Safe: true,
},
{
Name: "symbol",
ReturnType: smartcontract.StringType,
Safe: true,
},
{
Name: "totalSupply",
ReturnType: smartcontract.IntegerType,
Safe: true,
},
{
Name: "transfer",
Parameters: []manifest.Parameter{
{Type: smartcontract.Hash160Type},
{Type: smartcontract.Hash160Type},
{Type: smartcontract.IntegerType},
{Type: smartcontract.AnyType},
{Name: "from", Type: smartcontract.Hash160Type},
{Name: "to", Type: smartcontract.Hash160Type},
{Name: "amount", Type: smartcontract.IntegerType},
{Name: "data", Type: smartcontract.AnyType},
},
ReturnType: smartcontract.BoolType,
},
@ -46,16 +33,12 @@ var nep17 = &manifest.Manifest{
{
Name: "Transfer",
Parameters: []manifest.Parameter{
{Type: smartcontract.Hash160Type},
{Type: smartcontract.Hash160Type},
{Type: smartcontract.IntegerType},
{Name: "from", Type: smartcontract.Hash160Type},
{Name: "to", Type: smartcontract.Hash160Type},
{Name: "amount", Type: smartcontract.IntegerType},
},
},
},
},
},
}
// IsNEP17 checks if m is NEP-17 compliant.
func IsNEP17(m *manifest.Manifest) error {
return Comply(m, nep17)
}

38
pkg/smartcontract/manifest/standard/payable.go Normal file
View file

@ -0,0 +1,38 @@
package standard
import (
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
)
var nep11payable = &Standard{
Manifest: manifest.Manifest{
ABI: manifest.ABI{
Methods: []manifest.Method{{
Name: manifest.MethodOnNEP11Payment,
Parameters: []manifest.Parameter{
{Name: "from", Type: smartcontract.Hash160Type},
{Name: "amount", Type: smartcontract.IntegerType},
{Name: "tokenid", Type: smartcontract.ByteArrayType},
},
ReturnType: smartcontract.VoidType,
}},
},
},
}
var nep17payable = &Standard{
Manifest: manifest.Manifest{
ABI: manifest.ABI{
Methods: []manifest.Method{{
Name: manifest.MethodOnNEP17Payment,
Parameters: []manifest.Parameter{
{Name: "from", Type: smartcontract.Hash160Type},
{Name: "amount", Type: smartcontract.IntegerType},
{Name: "data", Type: smartcontract.AnyType},
},
ReturnType: smartcontract.VoidType,
}},
},
},
}

30
pkg/smartcontract/manifest/standard/token.go Normal file
View file

@ -0,0 +1,30 @@
package standard
import (
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
)
var decimalTokenBase = &Standard{
Manifest: manifest.Manifest{
ABI: manifest.ABI{
Methods: []manifest.Method{
{
Name: "decimals",
ReturnType: smartcontract.IntegerType,
Safe: true,
},
{
Name: "symbol",
ReturnType: smartcontract.StringType,
Safe: true,
},
{
Name: "totalSupply",
ReturnType: smartcontract.IntegerType,
Safe: true,
},
},
},
},
}