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package main
import (
"encoding/json"
"io/ioutil"
"math/big"
"testing"
qt "github.com/frankban/quicktest"
"github.com/vocdoni/arbo"
"go.vocdoni.io/dvote/db/badgerdb"
)
func TestGenerator(t *testing.T) {
c := qt.New(t)
database, err := badgerdb.New(badgerdb.Options{Path: c.TempDir()})
c.Assert(err, qt.IsNil)
tree, err := arbo.NewTree(database, 4, arbo.HashFunctionPoseidon)
c.Assert(err, qt.IsNil)
bLen := tree.HashFunction().Len()
testVector := [][]int64{
{1, 11},
{2, 22},
{3, 33},
{4, 44},
}
for i := 0; i < len(testVector); i++ {
k := arbo.BigIntToBytes(bLen, big.NewInt(testVector[i][0]))
v := arbo.BigIntToBytes(bLen, big.NewInt(testVector[i][1]))
if err := tree.Add(k, v); err != nil {
t.Fatal(err)
}
}
// proof of existence
k := arbo.BigIntToBytes(bLen, big.NewInt(int64(2)))
cvp, err := tree.GenerateCircomVerifierProof(k)
c.Assert(err, qt.IsNil)
jCvp, err := json.Marshal(cvp)
c.Assert(err, qt.IsNil)
// store the data into a file that will be used at the circom test
err = ioutil.WriteFile("go-smt-verifier-inputs.json", jCvp, 0600)
c.Assert(err, qt.IsNil)
// proof of non-existence
k = arbo.BigIntToBytes(bLen, big.NewInt(int64(5)))
cvp, err = tree.GenerateCircomVerifierProof(k)
c.Assert(err, qt.IsNil)
jCvp, err = json.Marshal(cvp)
c.Assert(err, qt.IsNil)
// store the data into a file that will be used at the circom test
err = ioutil.WriteFile("go-smt-verifier-non-existence-inputs.json", jCvp, 0600)
c.Assert(err, qt.IsNil)
}