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Generate Java structs #7

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Generate Java structs #7

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a88303b
accounts/abi/bind: generate java structs
MariusVanDerWijden Apr 27, 2020
6763074
mobile: started work on java structs
MariusVanDerWijden Apr 30, 2020
bda652c
mobile: added MakeStructsFromJSON
MariusVanDerWijden May 5, 2020
8557715
mobile: added NewInterfacesFromJSON
MariusVanDerWijden May 6, 2020
5d1c041
mobile: modified NewInterfacesFromJSON, added test
MariusVanDerWijden May 6, 2020
8e78ee0
mobile: return proper interface
MariusVanDerWijden May 7, 2020
1422955
mobile: return proper interface
MariusVanDerWijden May 7, 2020
043269a
accounts/abi: reverted unnecessary export
MariusVanDerWijden May 12, 2020
fdacfeb
mobile: minor additions to interfaces
MariusVanDerWijden May 12, 2020
6be6897
mobile: fixed interface conversion for structs
MariusVanDerWijden May 13, 2020
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2 changes: 1 addition & 1 deletion accounts/abi/abi.go
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Original file line number Diff line number Diff line change
Expand Up @@ -86,7 +86,7 @@ func (abi ABI) Unpack(v interface{}, name string, data []byte) (err error) {
// we need to decide whether we're calling a method or an event
if method, ok := abi.Methods[name]; ok {
if len(data)%32 != 0 {
return fmt.Errorf("abi: improperly formatted output: %s - Bytes: [%+v]", string(data), data)
return fmt.Errorf("abi: improperly formatted output: length: %d - %s - Bytes: [%+v]", len(data), string(data), data)
}
return method.Outputs.Unpack(v, data)
}
Expand Down
5 changes: 0 additions & 5 deletions accounts/abi/bind/bind.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,6 @@ package bind

import (
"bytes"
"errors"
"fmt"
"go/format"
"regexp"
Expand Down Expand Up @@ -165,10 +164,6 @@ func Bind(types []string, abis []string, bytecodes []string, fsigs []map[string]
if evmABI.HasReceive() {
receive = &tmplMethod{Original: evmABI.Receive}
}
// There is no easy way to pass arbitrary java objects to the Go side.
if len(structs) > 0 && lang == LangJava {
return "", errors.New("java binding for tuple arguments is not supported yet")
}

contracts[types[i]] = &tmplContract{
Type: capitalise(types[i]),
Expand Down
17 changes: 16 additions & 1 deletion accounts/abi/bind/bind_test.go
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Expand Up @@ -2150,7 +2150,7 @@ public class Test {
for _, line := range lines {
if strings.TrimSpace(line) != "" {
lines[index] = line
index += 1
index++
}
}
lines = lines[:index]
Expand All @@ -2163,3 +2163,18 @@ public class Test {
}
}
}

// Tests binding the bindTests succeeds (does not execute test cases, only checks binding errors)
func TestGenerateBindingingJava(t *testing.T) {
// Generate the test suite for all the contracts
for _, tt := range bindTests {
bind, err := Bind([]string{tt.name}, tt.abi, tt.bytecode, nil, "bindtest", LangJava, nil, tt.aliases)
if err != nil {
t.Fatalf("test %s: failed to generate binding: %v", tt.name, err)
}
if err := ioutil.WriteFile("/home/matematik/j-bindings/"+tt.name, []byte(bind), 0600); err != nil {
t.Fatal(err)
}

}
}
8 changes: 8 additions & 0 deletions accounts/abi/bind/template.go
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Original file line number Diff line number Diff line change
Expand Up @@ -612,6 +612,14 @@ import java.util.*;
this(Geth.bindContract(address, ABI, client));
}

{{range $structs}}
// {{capitalise .Name}} is an auto generated low-level Java binding around an user-defined struct.
public class {{capitalise .Name}} {
{{range $index, $item := .Fields}}public {{$item.Type}} {{if ne .Name ""}}{{.Name}}{{else}}Return{{$index}}{{end}};
{{end}}
}
{{end}}

{{range .Calls}}
{{if gt (len .Normalized.Outputs) 1}}
// {{capitalise .Normalized.Name}}Results is the output of a call to {{.Normalized.Name}}.
Expand Down
14 changes: 7 additions & 7 deletions accounts/abi/error.go
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Original file line number Diff line number Diff line change
Expand Up @@ -39,11 +39,11 @@ func formatSliceString(kind reflect.Kind, sliceSize int) string {
// type in t.
func sliceTypeCheck(t Type, val reflect.Value) error {
if val.Kind() != reflect.Slice && val.Kind() != reflect.Array {
return typeErr(formatSliceString(t.getType().Kind(), t.Size), val.Type())
return typeErr(formatSliceString(t.GetType().Kind(), t.Size), val.Type())
}

if t.T == ArrayTy && val.Len() != t.Size {
return typeErr(formatSliceString(t.Elem.getType().Kind(), t.Size), formatSliceString(val.Type().Elem().Kind(), val.Len()))
return typeErr(formatSliceString(t.Elem.GetType().Kind(), t.Size), formatSliceString(val.Type().Elem().Kind(), val.Len()))
}

if t.Elem.T == SliceTy || t.Elem.T == ArrayTy {
Expand All @@ -52,8 +52,8 @@ func sliceTypeCheck(t Type, val reflect.Value) error {
}
}

if elemKind := val.Type().Elem().Kind(); elemKind != t.Elem.getType().Kind() {
return typeErr(formatSliceString(t.Elem.getType().Kind(), t.Size), val.Type())
if elemKind := val.Type().Elem().Kind(); elemKind != t.Elem.GetType().Kind() {
return typeErr(formatSliceString(t.Elem.GetType().Kind(), t.Size), val.Type())
}
return nil
}
Expand All @@ -66,10 +66,10 @@ func typeCheck(t Type, value reflect.Value) error {
}

// Check base type validity. Element types will be checked later on.
if t.getType().Kind() != value.Kind() {
return typeErr(t.getType().Kind(), value.Kind())
if t.GetType().Kind() != value.Kind() {
return typeErr(t.GetType().Kind(), value.Kind())
} else if t.T == FixedBytesTy && t.Size != value.Len() {
return typeErr(t.getType(), value.Type())
return typeErr(t.GetType(), value.Type())
} else {
return nil
}
Expand Down
8 changes: 4 additions & 4 deletions accounts/abi/type.go
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Original file line number Diff line number Diff line change
Expand Up @@ -173,7 +173,7 @@ func NewType(t string, internalType string, components []ArgumentMarshaling) (ty
}
fields = append(fields, reflect.StructField{
Name: ToCamelCase(c.Name), // reflect.StructOf will panic for any exported field.
Type: cType.getType(),
Type: cType.GetType(),
Tag: reflect.StructTag("json:\"" + c.Name + "\""),
})
elems = append(elems, &cType)
Expand Down Expand Up @@ -211,7 +211,7 @@ func NewType(t string, internalType string, components []ArgumentMarshaling) (ty
return
}

func (t Type) getType() reflect.Type {
func (t Type) GetType() reflect.Type {
switch t.T {
case IntTy:
return reflectIntType(false, t.Size)
Expand All @@ -222,9 +222,9 @@ func (t Type) getType() reflect.Type {
case StringTy:
return reflect.TypeOf("")
case SliceTy:
return reflect.SliceOf(t.Elem.getType())
return reflect.SliceOf(t.Elem.GetType())
case ArrayTy:
return reflect.ArrayOf(t.Size, t.Elem.getType())
return reflect.ArrayOf(t.Size, t.Elem.GetType())
case TupleTy:
return t.TupleType
case AddressTy:
Expand Down
8 changes: 4 additions & 4 deletions accounts/abi/unpack.go
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,7 @@ func ReadFixedBytes(t Type, word []byte) (interface{}, error) {
return nil, fmt.Errorf("abi: invalid type in call to make fixed byte array")
}
// convert
array := reflect.New(t.getType()).Elem()
array := reflect.New(t.GetType()).Elem()

reflect.Copy(array, reflect.ValueOf(word[0:t.Size]))
return array.Interface(), nil
Expand All @@ -131,10 +131,10 @@ func forEachUnpack(t Type, output []byte, start, size int) (interface{}, error)

if t.T == SliceTy {
// declare our slice
refSlice = reflect.MakeSlice(t.getType(), size, size)
refSlice = reflect.MakeSlice(t.GetType(), size, size)
} else if t.T == ArrayTy {
// declare our array
refSlice = reflect.New(t.getType()).Elem()
refSlice = reflect.New(t.GetType()).Elem()
} else {
return nil, fmt.Errorf("abi: invalid type in array/slice unpacking stage")
}
Expand All @@ -158,7 +158,7 @@ func forEachUnpack(t Type, output []byte, start, size int) (interface{}, error)
}

func forTupleUnpack(t Type, output []byte) (interface{}, error) {
retval := reflect.New(t.getType()).Elem()
retval := reflect.New(t.GetType()).Elem()
virtualArgs := 0
for index, elem := range t.TupleElems {
marshalledValue, err := ToGoType((index+virtualArgs)*32, *elem, output)
Expand Down
3 changes: 2 additions & 1 deletion go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -58,8 +58,9 @@ require (
github.com/tyler-smith/go-bip39 v1.0.1-0.20181017060643-dbb3b84ba2ef
github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208
golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4
golang.org/x/mobile v0.0.0-20200329125638-4c31acba0007 // indirect
golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 // indirect
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f
golang.org/x/sync v0.0.0-20190423024810-112230192c58
golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd
golang.org/x/text v0.3.2
golang.org/x/time v0.0.0-20190308202827-9d24e82272b4
Expand Down
24 changes: 24 additions & 0 deletions go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6L
github.com/Azure/go-autorest/tracing v0.5.0 h1:TRn4WjSnkcSy5AEG3pnbtFSwNtwzjr4VYyQflFE619k=
github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 h1:fLjPD/aNc3UIOA6tDi6QXUemppXK3P9BI7mr2hd6gx8=
github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
Expand Down Expand Up @@ -188,16 +189,32 @@ github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtX
github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 h1:1cngl9mPEoITZG8s8cVcUy5CeIBYhEESkOB7m6Gmkrk=
github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208/go.mod h1:IotVbo4F+mw0EzQ08zFqg7pK3FebNXpaMsRy2RT+Ees=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4 h1:QmwruyY+bKbDDL0BaglrbZABEali68eoMFhTZpCjYVA=
golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/exp v0.0.0-20190731235908-ec7cb31e5a56/go.mod h1:JhuoJpWY28nO4Vef9tZUw9qufEGTyX1+7lmHxV5q5G4=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20200329125638-4c31acba0007 h1:JxsyO7zPDWn1rBZW8FV5RFwCKqYeXnyaS/VQPLpXu6I=
golang.org/x/mobile v0.0.0-20200329125638-4c31acba0007/go.mod h1:skQtrUTUwhdJvXM/2KKJzY8pDgNr9I/FOMqDVRPBUS4=
golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.1.1-0.20191209134235-331c550502dd h1:ePuNC7PZ6O5BzgPn9bZayERXBdfZjUYoXEf5BTfDfh8=
golang.org/x/mod v0.1.1-0.20191209134235-331c550502dd/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181011144130-49bb7cea24b1/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 h1:Jcxah/M+oLZ/R4/z5RzfPzGbPXnVDPkEDtf2JnuxN+U=
golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f h1:Bl/8QSvNqXvPGPGXa2z5xUTmV7VDcZyvRZ+QQXkXTZQ=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
Expand All @@ -210,6 +227,13 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 h1:SvFZT6jyqRaOeXpc5h/JSfZenJ2O330aBsf7JfSUXmQ=
golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20200117012304-6edc0a871e69 h1:yBHHx+XZqXJBm6Exke3N7V9gnlsyXxoCPEb1yVenjfk=
golang.org/x/tools v0.0.0-20200117012304-6edc0a871e69/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 h1:/atklqdjdhuosWIl6AIbOeHJjicWYPqR9bpxqxYG2pA=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
Expand Down
77 changes: 71 additions & 6 deletions mobile/interface.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,9 +19,12 @@
package geth

import (
"encoding/json"
"errors"
"math/big"
"reflect"

"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
)

Expand Down Expand Up @@ -116,8 +119,9 @@ func (i *Interface) SetUint64s(bigints *BigInts) {
}
i.object = &ints
}
func (i *Interface) SetBigInt(bigint *BigInt) { i.object = &bigint.bigint }
func (i *Interface) SetBigInts(bigints *BigInts) { i.object = &bigints.bigints }
func (i *Interface) SetBigInt(bigint *BigInt) { i.object = &bigint.bigint }
func (i *Interface) SetBigInts(bigints *BigInts) { i.object = &bigints.bigints }
func (i *Interface) SetInterfaces(ifaces *Interfaces) { i.object = &ifaces.objects }

func (i *Interface) SetDefaultBool() { i.object = new(bool) }
func (i *Interface) SetDefaultBools() { i.object = new([]bool) }
Expand Down Expand Up @@ -238,8 +242,9 @@ func (i *Interface) GetUint64s() *BigInts {
}
return bigints
}
func (i *Interface) GetBigInt() *BigInt { return &BigInt{*i.object.(**big.Int)} }
func (i *Interface) GetBigInts() *BigInts { return &BigInts{*i.object.(*[]*big.Int)} }
func (i *Interface) GetBigInt() *BigInt { return &BigInt{*i.object.(**big.Int)} }
func (i *Interface) GetBigInts() *BigInts { return &BigInts{*i.object.(*[]*big.Int)} }
func (i *Interface) GetInterfaces() *Interfaces { return &Interfaces{*i.object.(*[]interface{})} }

// Interfaces is a slices of wrapped generic objects.
type Interfaces struct {
Expand All @@ -251,12 +256,66 @@ func NewInterfaces(size int) *Interfaces {
return &Interfaces{objects: make([]interface{}, size)}
}

// NewInterfacesFromJSON creates a new Interface slice that contains the
// prototype of types defined in the input json.
func NewInterfacesFromJSON(definition string, data *Interfaces) (*Interface, error) {
tuple, err := tupleFromJSON(definition)
if err != nil {
return nil, err
}

fld := tuple.Elem().Field(0)
for idx, elem := range data.objects {
fieldValue := fld.Field(idx)
if fieldValue.IsValid() {
val := reflect.Indirect(reflect.ValueOf(elem))
fieldValue.Set(val)
} else {
return nil, errors.New("Could not find field, json does not match provided struct")
}
}

return &Interface{fld.Interface()}, nil
}

// NewInterfacesFromJSONDefault creates a new Interface slice that contains the
// prototype of types defined in the input json.
func NewInterfacesFromJSONDefault(definition string) (*Interface, error) {
tuple, err := tupleFromJSON(definition)
if err != nil {
return nil, err
}

fld := tuple.Elem().Field(0)
return &Interface{fld.Addr().Interface()}, nil
}

// tupleFromJSON creates a new tuple as defined in the definition
func tupleFromJSON(definition string) (reflect.Value, error) {
var field struct {
Inputs abi.Arguments
}
if err := json.Unmarshal([]byte(definition), &field); err != nil {
return reflect.Value{}, err
}

var structFields []reflect.StructField
for _, in := range field.Inputs {
structFields = append(structFields, reflect.StructField{
Name: abi.ToCamelCase(in.Name), // reflect.StructOf will panic for any exported field.
Type: in.Type.GetType(),
Tag: reflect.StructTag("json:\"" + in.Name + "\""),
})
}
return reflect.New(reflect.StructOf(structFields)), nil
}

// Size returns the number of interfaces in the slice.
func (i *Interfaces) Size() int {
return len(i.objects)
}

// Get returns the bigint at the given index from the slice.
// Get returns the interface at the given index from the slice.
// Notably the returned value can be changed without affecting the
// interfaces itself.
func (i *Interfaces) Get(index int) (iface *Interface, _ error) {
Expand All @@ -266,11 +325,17 @@ func (i *Interfaces) Get(index int) (iface *Interface, _ error) {
return &Interface{object: i.objects[index]}, nil
}

// Set sets the big int at the given index in the slice.
// Set sets the interface at the given index in the slice.
func (i *Interfaces) Set(index int, object *Interface) error {
if index < 0 || index >= len(i.objects) {
return errors.New("index out of bounds")
}
i.objects[index] = object.object
return nil
}

func (i *Interfaces) SetInterfaces(index int, objects *Interfaces) error {
var in Interface
in.SetInterfaces(objects)
return i.Set(index, &in)
}
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