prysm-pulse/beacon-chain/state/state-native/v1/proofs_test.go

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package v1_test
import (
"context"
"testing"
v1 "github.com/prysmaticlabs/prysm/beacon-chain/state/state-native/v1"
"github.com/prysmaticlabs/prysm/container/trie"
"github.com/prysmaticlabs/prysm/testing/require"
"github.com/prysmaticlabs/prysm/testing/util"
)
func TestBeaconStateMerkleProofs(t *testing.T) {
ctx := context.Background()
st, _ := util.DeterministicGenesisState(t, 256)
htr, err := st.HashTreeRoot(ctx)
require.NoError(t, err)
t.Run("current sync committee", func(t *testing.T) {
_, err := st.CurrentSyncCommitteeProof(ctx)
require.ErrorContains(t, "unsupported", err)
})
t.Run("next sync committee", func(t *testing.T) {
_, err := st.NextSyncCommitteeProof(ctx)
require.ErrorContains(t, "unsupported", err)
})
t.Run("finalized root", func(t *testing.T) {
finalizedRoot := st.FinalizedCheckpoint().Root
proof, err := st.FinalizedRootProof(ctx)
require.NoError(t, err)
gIndex := v1.FinalizedRootGeneralizedIndex()
valid := trie.VerifyMerkleProof(htr[:], finalizedRoot, gIndex, proof)
require.Equal(t, true, valid)
})
t.Run("recomputes root on dirty fields", func(t *testing.T) {
currentRoot, err := st.HashTreeRoot(ctx)
require.NoError(t, err)
cpt := st.FinalizedCheckpoint()
require.NoError(t, err)
// Edit the checkpoint.
cpt.Epoch = 100
require.NoError(t, st.SetFinalizedCheckpoint(cpt))
// Produce a proof for the finalized root.
proof, err := st.FinalizedRootProof(ctx)
require.NoError(t, err)
// We expect the previous step to have triggered
// a recomputation of dirty fields in the beacon state, resulting
// in a new hash tree root as the finalized checkpoint had previously
// changed and should have been marked as a dirty state field.
// The proof validity should be false for the old root, but true for the new.
finalizedRoot := st.FinalizedCheckpoint().Root
gIndex := v1.FinalizedRootGeneralizedIndex()
valid := trie.VerifyMerkleProof(currentRoot[:], finalizedRoot, gIndex, proof)
require.Equal(t, false, valid)
newRoot, err := st.HashTreeRoot(ctx)
require.NoError(t, err)
valid = trie.VerifyMerkleProof(newRoot[:], finalizedRoot, gIndex, proof)
require.Equal(t, true, valid)
})
}