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proof_test.go
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package merkletree_test
import (
"context"
"encoding/json"
"math/big"
"testing"
"github.com/iden3/go-merkletree-sql"
"github.com/iden3/go-merkletree-sql/db/memory"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestProof_MarshalJSON(t *testing.T) {
db := memory.NewMemoryStorage()
ctx := context.Background()
mt, err := merkletree.NewMerkleTree(ctx, db, 40)
require.NoError(t, err)
_ = mt.Add(ctx, big.NewInt(0x0001), big.NewInt(2))
_ = mt.Add(ctx, big.NewInt(0x0011), big.NewInt(8))
proof, _, err := mt.GenerateProof(ctx, big.NewInt(1), mt.Root())
require.NoError(t, err)
expected := `{"existence":true,"siblings":["0","0","0","0","13167809686468103484252970188077542812117386492167015186848701688893624465068"]}` //nolint:lll
jsonProof, err := proof.MarshalJSON()
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof))
jsonProof2, err := json.Marshal(proof)
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof2))
var p merkletree.Proof
err = json.Unmarshal(jsonProof, &p)
require.NoError(t, err)
assert.Equal(t, proof.AllSiblings(), p.AllSiblings())
assert.Equal(t, proof.NodeAux, p.NodeAux)
assert.Equal(t, proof.Existence, p.Existence)
valid := merkletree.VerifyProof(mt.Root(), proof, big.NewInt(1), big.NewInt(2))
assert.True(t, valid)
valid = merkletree.VerifyProof(mt.Root(), &p, big.NewInt(1), big.NewInt(2))
assert.True(t, valid)
}
func TestProof_MarshalJSON_NonInclusionProofWithoutNodeAux(t *testing.T) {
db := memory.NewMemoryStorage()
ctx := context.Background()
mt, err := merkletree.NewMerkleTree(ctx, db, 40)
require.NoError(t, err)
_ = mt.Add(ctx, big.NewInt(1), big.NewInt(2))
_ = mt.Add(ctx, big.NewInt(2), big.NewInt(8))
_ = mt.Add(ctx, big.NewInt(3), big.NewInt(8))
_ = mt.Add(ctx, big.NewInt(17), big.NewInt(8))
_ = mt.Add(ctx, big.NewInt(18), big.NewInt(8))
_ = mt.Add(ctx, big.NewInt(19), big.NewInt(8))
expected := `{"existence":false,"siblings":["11445591970430686524669302036672429838422356071483318076578901368167305782934","0","19623034175990655567331847335376057032468128626960956120127301863642129702078"]}` //nolint:lll
proof, _, err := mt.GenerateProof(ctx, big.NewInt(6), mt.Root())
require.NoError(t, err)
jsonProof, err := proof.MarshalJSON()
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof))
// gives the same proof
proof, _, err = mt.GenerateProof(ctx, big.NewInt(14), mt.Root())
require.NoError(t, err)
jsonProof, err = proof.MarshalJSON()
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof))
// gives the same proof
proof, _, err = mt.GenerateProof(ctx, big.NewInt(22), mt.Root())
require.NoError(t, err)
jsonProof, err = proof.MarshalJSON()
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof))
// gives the same proof
proof, _, err = mt.GenerateProof(ctx, big.NewInt(30), mt.Root())
require.NoError(t, err)
jsonProof, err = proof.MarshalJSON()
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof))
// gives the same proof
proof, _, err = mt.GenerateProof(ctx, big.NewInt(38), mt.Root())
require.NoError(t, err)
jsonProof, err = proof.MarshalJSON()
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof))
// gives the same proof
proof, _, err = mt.GenerateProof(ctx, big.NewInt(46), mt.Root())
require.NoError(t, err)
jsonProof, err = proof.MarshalJSON()
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof))
//fmt.Println(string(jsonProof))
jsonProof2, err := json.Marshal(proof)
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof2))
var p merkletree.Proof
err = json.Unmarshal(jsonProof, &p)
require.NoError(t, err)
assert.Equal(t, proof.AllSiblings(), p.AllSiblings())
assert.Equal(t, proof.NodeAux, p.NodeAux)
assert.Equal(t, proof.Existence, p.Existence)
valid := merkletree.VerifyProof(mt.Root(), proof, big.NewInt(6), big.NewInt(0))
assert.True(t, valid)
valid = merkletree.VerifyProof(mt.Root(), &p, big.NewInt(6), big.NewInt(0))
assert.True(t, valid)
}
func TestProof_MarshalJSON_NonInclusionProofWithNodeAux(t *testing.T) {
db := memory.NewMemoryStorage()
ctx := context.Background()
mt, err := merkletree.NewMerkleTree(ctx, db, 40)
require.NoError(t, err)
_ = mt.Add(ctx, big.NewInt(1), big.NewInt(2)) // 1 0b000001
_ = mt.Add(ctx, big.NewInt(3), big.NewInt(8)) // 3 0b000011
_ = mt.Add(ctx, big.NewInt(7), big.NewInt(8)) // 7 0b000111
_ = mt.Add(ctx, big.NewInt(9), big.NewInt(8)) // 9 0b001001
//nolint:lll
expected := `{"existence":false,"siblings":["0","12166698708103333637493481507263348370172773813051235807348785759284762677336","7750564177398573185975752951631372712868228752107043582052272719841058100111"],"node_aux":{"key":"3","value":"8"}}`
proof, _, err := mt.GenerateProof(ctx, big.NewInt(11), mt.Root()) // 11 0b001011
require.NoError(t, err)
jsonProof, err := proof.MarshalJSON()
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof))
//fmt.Println(string(jsonProof))
jsonProof2, err := json.Marshal(proof)
require.NoError(t, err)
assert.JSONEq(t, expected, string(jsonProof2))
var p merkletree.Proof
err = json.Unmarshal(jsonProof, &p)
require.NoError(t, err)
assert.Equal(t, proof.AllSiblings(), p.AllSiblings())
assert.Equal(t, proof.NodeAux, p.NodeAux)
assert.Equal(t, proof.Existence, p.Existence)
valid := merkletree.VerifyProof(mt.Root(), proof, big.NewInt(11), big.NewInt(0))
assert.True(t, valid)
valid = merkletree.VerifyProof(mt.Root(), &p, big.NewInt(11), big.NewInt(0))
assert.True(t, valid)
}