https://github.com/iden3/go-merkletree

MerkleTree compatible with circomlib/smt
https://github.com/iden3/go-merkletree

Last synced: 2 months ago
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MerkleTree compatible with circomlib/smt

• Host: GitHub
• URL: https://github.com/iden3/go-merkletree
• Owner: iden3
• License: gpl-3.0
• Created: 2020-06-30T20:03:08.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2021-07-09T07:35:46.000Z (over 3 years ago)
• Last Synced: 2024-08-03T08:02:36.156Z (5 months ago)
• Language: Go
• Size: 196 KB
• Stars: 13
• Watchers: 7
• Forks: 15
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-circom - go-merkletree - MerkleTree compatible with circomlib (Cryptographic primitives / Cryptographic primitives in other languages)

README

        
# go-merkletree [![GoDoc](https://godoc.org/github.com/iden3/go-merkletree?status.svg)](https://godoc.org/github.com/iden3/go-merkletree) [![Go Report Card](https://goreportcard.com/badge/github.com/iden3/go-merkletree)](https://goreportcard.com/report/github.com/iden3/go-merkletree) [![Test](https://github.com/iden3/go-merkletree/workflows/Test/badge.svg)](https://github.com/iden3/go-merkletree/actions?query=workflow%3ATest)

MerkleTree compatible with version from [circomlib](https://github.com/iden3/circomlib).

Adaptation of the merkletree from https://github.com/iden3/go-iden3-core/tree/v0.0.8 with several changes and more functionalities.

## Usage

More detailed examples can be found at the [tests](https://github.com/iden3/go-merkletree/blob/master/merkletree_test.go), and in the [documentation](https://godoc.org/github.com/iden3/go-merkletree).

```go

import (

	"fmt"

	"math/big"

	"testing"

	"github.com/iden3/go-iden3-core/db"

	"github.com/stretchr/testify/assert"

)

[...]

func TestExampleMerkleTree(t *testing.T) {

	mt, err := NewMerkleTree(db.NewMemoryStorage(), 10)

	assert.Nil(t, err)

	key := big.NewInt(1)

	value := big.NewInt(2)

	err = mt.Add(key, value)

	assert.Nil(t, err)

	fmt.Println(mt.Root().String())

	v, err := mt.Get(key)

	asseert.Equal(t, value, v)

	value = big.NewInt(3)

	err = mt.Update(key, value)

	proof, err := mt.GenerateProof(key, nil)

	assert.Nil(t, err)

	assert.True(t, VerifyProof(mt.Root(), proof, key, value))

	err := mt.Delete(big.NewInt(1)) // delete the leaf of key=1

	assert.Nil(t, err)

}

```