mirror of
https://github.com/wealdtech/ethdo.git
synced 2026-01-07 21:24:01 -05:00
112 lines
3.6 KiB
Go
112 lines
3.6 KiB
Go
// Copyright © 2017-2020 Weald Technology Trading
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"encoding/hex"
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"fmt"
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"os"
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"strconv"
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"strings"
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"github.com/herumi/bls-eth-go-binary/bls"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"github.com/wealdtech/ethdo/util"
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)
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var signatureAggregateSignatures []string
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// signatureAggregateCmd represents the signature aggregate command.
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var signatureAggregateCmd = &cobra.Command{
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Use: "aggregate",
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Short: "Aggregate signatures",
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Long: `Aggregate signatures, either threshold or absolute. For example:
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ethdo signature aggregate --signatures=0x5f24e819400c6a8ee2bfc014343cd971b7eb707320025a7bcd83e621e26c35b7,
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Signatures are specified as "signature" for simple aggregation, and as "id:signature" for threshold aggregation.
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In quiet mode this will return 0 if the signatures can be aggregated, otherwise 1.`,
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Run: func(_ *cobra.Command, _ []string) {
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assert(len(signatureAggregateSignatures) > 1, "multiple signatures required to aggregate")
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var signature *bls.Sign
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var err error
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if strings.Contains(signatureAggregateSignatures[0], ":") {
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signature, err = generateThresholdSignature()
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} else {
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signature, err = generateAggregateSignature()
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}
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errCheck(err, "Failed to aggregate signature")
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outputIf(!viper.GetBool("quiet"), fmt.Sprintf("%#x", signature.Serialize()))
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os.Exit(_exitSuccess)
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},
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}
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func generateThresholdSignature() (*bls.Sign, error) {
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ids := make([]bls.ID, len(signatureAggregateSignatures))
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sigs := make([]bls.Sign, len(signatureAggregateSignatures))
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for i := range signatureAggregateSignatures {
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parts := strings.Split(signatureAggregateSignatures[i], ":")
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if len(parts) != 2 {
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return nil, errors.New("invalid threshold signature format")
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}
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id, err := strconv.ParseUint(parts[0], 10, 64)
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if err != nil {
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return nil, errors.Wrap(err, "invalid threshold signature ID")
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}
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ids[i] = *util.BLSID(id)
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sigBytes, err := hex.DecodeString(strings.TrimPrefix(parts[1], "0x"))
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if err != nil {
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return nil, errors.Wrap(err, "invalid threshold signature ID")
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}
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if err := sigs[i].Deserialize(sigBytes); err != nil {
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return nil, errors.Wrap(err, "invalid signature")
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}
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}
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var compositeSig bls.Sign
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if err := compositeSig.Recover(sigs, ids); err != nil {
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return nil, err
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}
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return &compositeSig, nil
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}
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func generateAggregateSignature() (*bls.Sign, error) {
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sigs := make([]bls.Sign, len(signatureAggregateSignatures))
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for i := range signatureAggregateSignatures {
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sigBytes, err := hex.DecodeString(strings.TrimPrefix(signatureAggregateSignatures[i], "0x"))
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if err != nil {
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return nil, errors.Wrap(err, "failed to decode signature")
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}
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if err := sigs[i].Deserialize(sigBytes); err != nil {
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return nil, errors.Wrap(err, "invalid signature")
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}
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}
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var aggregateSig bls.Sign
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aggregateSig.Aggregate(sigs)
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return &aggregateSig, nil
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}
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func init() {
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signatureCmd.AddCommand(signatureAggregateCmd)
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signatureAggregateCmd.Flags().StringArrayVar(&signatureAggregateSignatures, "signature", nil, "a signature to aggregate (supply once for each signature)")
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signatureFlags(signatureAggregateCmd)
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}
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