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commcid_test.go
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package commcid_test
import (
"bytes"
"crypto/rand"
"testing"
commcid "github.com/filecoin-project/go-fil-commcid"
"github.com/ipfs/go-cid"
"github.com/multiformats/go-multihash"
"github.com/multiformats/go-varint"
"github.com/stretchr/testify/require"
)
func TestDataCommitmentToCID(t *testing.T) {
randBytes := make([]byte, 32)
_, err := rand.Read(randBytes)
require.NoError(t, err)
c, err := commcid.DataCommitmentV1ToCID(randBytes)
require.NoError(t, err)
require.Equal(t, c.Prefix().Codec, uint64(cid.FilCommitmentUnsealed))
mh := c.Hash()
decoded, err := multihash.Decode([]byte(mh))
require.NoError(t, err)
require.Equal(t, decoded.Code, uint64(multihash.SHA2_256_TRUNC254_PADDED))
require.Equal(t, decoded.Length, len(randBytes))
require.True(t, bytes.Equal(decoded.Digest, randBytes))
}
func TestCIDToDataCommitment(t *testing.T) {
randBytes := make([]byte, 32)
_, err := rand.Read(randBytes)
require.NoError(t, err)
t.Run("with correct hash format", func(t *testing.T) {
hash := testMultiHash(multihash.SHA2_256_TRUNC254_PADDED, randBytes, 0)
t.Run("decodes raw commitment hash when correct cid format", func(t *testing.T) {
c := cid.NewCidV1(cid.FilCommitmentUnsealed, hash)
decoded, err := commcid.CIDToDataCommitmentV1(c)
require.NoError(t, err)
require.True(t, bytes.Equal(decoded, randBytes))
})
t.Run("error on non-fil codec", func(t *testing.T) {
c := cid.NewCidV1(cid.DagCBOR, hash)
decoded, err := commcid.CIDToDataCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectCodec.Error())
require.Nil(t, decoded)
})
t.Run("error on wrong fil codec", func(t *testing.T) {
c := cid.NewCidV1(cid.FilCommitmentSealed, testMultiHash(multihash.POSEIDON_BLS12_381_A1_FC1, randBytes, 0))
decoded, err := commcid.CIDToDataCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectCodec.Error())
require.Nil(t, decoded)
})
t.Run("error on fil hash/codec mismatch", func(t *testing.T) {
c := cid.NewCidV1(cid.FilCommitmentUnsealed, testMultiHash(multihash.POSEIDON_BLS12_381_A1_FC1, randBytes, 0))
decoded, err := commcid.CIDToDataCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectHash.Error())
require.Nil(t, decoded)
})
})
t.Run("error on incorrectly formatted hash", func(t *testing.T) {
hash := testMultiHash(multihash.SHA2_256_TRUNC254_PADDED, randBytes, 5)
c := cid.NewCidV1(cid.FilCommitmentUnsealed, hash)
decoded, err := commcid.CIDToDataCommitmentV1(c)
require.Error(t, err)
require.Regexp(t, "^Error decoding data commitment hash:", err.Error())
require.Nil(t, decoded)
})
}
func TestReplicaCommitmentToCID(t *testing.T) {
randBytes := make([]byte, 32)
_, err := rand.Read(randBytes)
require.NoError(t, err)
c, err := commcid.ReplicaCommitmentV1ToCID(randBytes)
require.NoError(t, err)
require.Equal(t, c.Prefix().Codec, uint64(cid.FilCommitmentSealed))
mh := c.Hash()
decoded, err := multihash.Decode([]byte(mh))
require.NoError(t, err)
require.Equal(t, decoded.Code, uint64(multihash.POSEIDON_BLS12_381_A1_FC1))
require.Equal(t, decoded.Length, len(randBytes))
require.True(t, bytes.Equal(decoded.Digest, randBytes))
}
func TestCIDToReplicaCommitment(t *testing.T) {
randBytes := make([]byte, 32)
_, err := rand.Read(randBytes)
require.NoError(t, err)
t.Run("with correct hash format", func(t *testing.T) {
hash := testMultiHash(multihash.POSEIDON_BLS12_381_A1_FC1, randBytes, 0)
t.Run("decodes raw commitment hash when correct cid format", func(t *testing.T) {
c := cid.NewCidV1(cid.FilCommitmentSealed, hash)
decoded, err := commcid.CIDToReplicaCommitmentV1(c)
require.NoError(t, err)
require.True(t, bytes.Equal(decoded, randBytes))
})
t.Run("error on incorrect CID format", func(t *testing.T) {
c := cid.NewCidV1(cid.DagCBOR, hash)
decoded, err := commcid.CIDToReplicaCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectCodec.Error())
require.Nil(t, decoded)
})
t.Run("error on non-fil codec", func(t *testing.T) {
c := cid.NewCidV1(cid.DagCBOR, hash)
decoded, err := commcid.CIDToReplicaCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectCodec.Error())
require.Nil(t, decoded)
})
t.Run("error on wrong fil codec", func(t *testing.T) {
c := cid.NewCidV1(cid.FilCommitmentUnsealed, testMultiHash(multihash.SHA2_256_TRUNC254_PADDED, randBytes, 0))
decoded, err := commcid.CIDToReplicaCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectCodec.Error())
require.Nil(t, decoded)
})
t.Run("error on fil hash/codec mismatch", func(t *testing.T) {
c := cid.NewCidV1(cid.FilCommitmentSealed, testMultiHash(multihash.SHA2_256_TRUNC254_PADDED, randBytes, 0))
decoded, err := commcid.CIDToReplicaCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectHash.Error())
require.Nil(t, decoded)
})
})
t.Run("error on wrong hash type", func(t *testing.T) {
encoded, err := multihash.Encode(randBytes, multihash.SHA2_256)
require.NoError(t, err)
c := cid.NewCidV1(cid.Raw, multihash.Multihash(encoded))
decoded, err := commcid.CIDToReplicaCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectCodec.Error())
require.Nil(t, decoded)
})
t.Run("error on incorrectly formatted hash", func(t *testing.T) {
c := cid.NewCidV1(cid.FilCommitmentUnsealed, testMultiHash(multihash.POSEIDON_BLS12_381_A1_FC1, randBytes, 5))
decoded, err := commcid.CIDToReplicaCommitmentV1(c)
require.Error(t, err)
require.Regexp(t, "^Error decoding data commitment hash:", err.Error())
require.Nil(t, decoded)
})
}
func TestPieceCommitmentToCID(t *testing.T) {
randBytes := make([]byte, 32)
_, err := rand.Read(randBytes)
require.NoError(t, err)
c, err := commcid.PieceCommitmentV1ToCID(randBytes)
require.NoError(t, err)
require.Equal(t, c.Prefix().Codec, uint64(cid.FilCommitmentUnsealed))
mh := c.Hash()
decoded, err := multihash.Decode([]byte(mh))
require.NoError(t, err)
require.Equal(t, decoded.Code, uint64(multihash.SHA2_256_TRUNC254_PADDED))
require.Equal(t, decoded.Length, len(randBytes))
require.True(t, bytes.Equal(decoded.Digest, randBytes))
_, err = commcid.PieceCommitmentV1ToCID(randBytes[1:])
require.Regexp(t, "^commitments must be 32 bytes long", err.Error())
}
func TestCIDToPieceCommitment(t *testing.T) {
randBytes := make([]byte, 32)
_, err := rand.Read(randBytes)
require.NoError(t, err)
t.Run("with correct hash format", func(t *testing.T) {
hash := testMultiHash(multihash.SHA2_256_TRUNC254_PADDED, randBytes, 0)
t.Run("decodes raw commitment hash when correct cid format", func(t *testing.T) {
c := cid.NewCidV1(cid.FilCommitmentUnsealed, hash)
decoded, err := commcid.CIDToPieceCommitmentV1(c)
require.NoError(t, err)
require.True(t, bytes.Equal(decoded, randBytes))
})
t.Run("error on incorrect CID format", func(t *testing.T) {
c := cid.NewCidV1(cid.DagCBOR, hash)
decoded, err := commcid.CIDToPieceCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectCodec.Error())
require.Nil(t, decoded)
})
})
t.Run("error on incorrectly formatted hash", func(t *testing.T) {
hash := testMultiHash(multihash.SHA2_256_TRUNC254_PADDED, randBytes, 5)
c := cid.NewCidV1(cid.FilCommitmentUnsealed, hash)
decoded, err := commcid.CIDToPieceCommitmentV1(c)
require.Error(t, err)
require.Regexp(t, "^Error decoding data commitment hash:", err.Error())
require.Nil(t, decoded)
})
t.Run("error on wrong hash type", func(t *testing.T) {
encoded, err := multihash.Encode(randBytes, multihash.SHA2_256)
require.NoError(t, err)
c := cid.NewCidV1(cid.FilCommitmentUnsealed, multihash.Multihash(encoded))
decoded, err := commcid.CIDToPieceCommitmentV1(c)
require.EqualError(t, err, commcid.ErrIncorrectHash.Error())
require.Nil(t, decoded)
})
}
func testMultiHash(code uint64, buf []byte, extra int) multihash.Multihash {
newBuf := make([]byte, varint.UvarintSize(code)+varint.UvarintSize(uint64(len(buf)))+len(buf)+extra)
n := varint.PutUvarint(newBuf, code)
n += varint.PutUvarint(newBuf[n:], uint64(len(buf)))
copy(newBuf[n:], buf)
return multihash.Multihash(newBuf)
}