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unrealized_justification_test.go
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package doublylinkedtree
import (
"testing"
"github.com/prysmaticlabs/prysm/config/params"
types "github.com/prysmaticlabs/prysm/consensus-types/primitives"
"github.com/prysmaticlabs/prysm/testing/require"
"golang.org/x/net/context"
)
func TestStore_SetUnrealizedEpochs(t *testing.T) {
f := setup(1, 1)
ctx := context.Background()
require.NoError(t, f.InsertOptimisticBlock(ctx, 100, [32]byte{'a'}, params.BeaconConfig().ZeroHash, [32]byte{'A'}, 1, 1))
require.NoError(t, f.InsertOptimisticBlock(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, [32]byte{'B'}, 1, 1))
require.NoError(t, f.InsertOptimisticBlock(ctx, 102, [32]byte{'c'}, [32]byte{'b'}, [32]byte{'C'}, 1, 1))
f.store.nodesLock.RLock()
require.Equal(t, types.Epoch(1), f.store.nodeByRoot[[32]byte{'b'}].unrealizedJustifiedEpoch)
require.Equal(t, types.Epoch(1), f.store.nodeByRoot[[32]byte{'b'}].unrealizedFinalizedEpoch)
f.store.nodesLock.RUnlock()
require.NoError(t, f.store.setUnrealizedJustifiedEpoch([32]byte{'b'}, 2))
require.NoError(t, f.store.setUnrealizedFinalizedEpoch([32]byte{'b'}, 2))
f.store.nodesLock.RLock()
require.Equal(t, types.Epoch(2), f.store.nodeByRoot[[32]byte{'b'}].unrealizedJustifiedEpoch)
require.Equal(t, types.Epoch(2), f.store.nodeByRoot[[32]byte{'b'}].unrealizedFinalizedEpoch)
f.store.nodesLock.RUnlock()
require.ErrorIs(t, errInvalidUnrealizedJustifiedEpoch, f.store.setUnrealizedJustifiedEpoch([32]byte{'b'}, 0))
require.ErrorIs(t, errInvalidUnrealizedFinalizedEpoch, f.store.setUnrealizedFinalizedEpoch([32]byte{'b'}, 0))
}
func TestStore_UpdateUnrealizedCheckpoints(t *testing.T) {
f := setup(1, 1)
ctx := context.Background()
require.NoError(t, f.InsertOptimisticBlock(ctx, 100, [32]byte{'a'}, params.BeaconConfig().ZeroHash, [32]byte{'A'}, 1, 1))
require.NoError(t, f.InsertOptimisticBlock(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, [32]byte{'B'}, 1, 1))
require.NoError(t, f.InsertOptimisticBlock(ctx, 102, [32]byte{'c'}, [32]byte{'b'}, [32]byte{'C'}, 1, 1))
}
//
// Epoch 2 | Epoch 3
// |
// C |
// / |
// A <-- B |
// \ |
// ---- D
//
// B is the first block that justifies A.
//
func TestStore_LongFork(t *testing.T) {
f := setup(1, 1)
ctx := context.Background()
require.NoError(t, f.InsertOptimisticBlock(ctx, 100, [32]byte{'a'}, params.BeaconConfig().ZeroHash, [32]byte{'A'}, 1, 1))
require.NoError(t, f.InsertOptimisticBlock(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, [32]byte{'B'}, 1, 1))
require.NoError(t, f.store.setUnrealizedJustifiedEpoch([32]byte{'b'}, 2))
require.NoError(t, f.InsertOptimisticBlock(ctx, 102, [32]byte{'c'}, [32]byte{'b'}, [32]byte{'C'}, 1, 1))
require.NoError(t, f.store.setUnrealizedJustifiedEpoch([32]byte{'c'}, 2))
// Add an attestation to c, it is head
f.ProcessAttestation(ctx, []uint64{0}, [32]byte{'c'}, 1)
headRoot, err := f.Head(ctx, 1, [32]byte{}, []uint64{100}, 1)
require.NoError(t, err)
require.Equal(t, [32]byte{'c'}, headRoot)
// D is head even though its weight is lower.
require.NoError(t, f.InsertOptimisticBlock(ctx, 103, [32]byte{'d'}, [32]byte{'b'}, [32]byte{'D'}, 2, 1))
headRoot, err = f.Head(ctx, 2, [32]byte{}, []uint64{100}, 1)
require.NoError(t, err)
require.Equal(t, [32]byte{'d'}, headRoot)
require.Equal(t, uint64(0), f.store.nodeByRoot[[32]byte{'d'}].weight)
require.Equal(t, uint64(100), f.store.nodeByRoot[[32]byte{'c'}].weight)
// Update unrealized justification, c becomes head
f.UpdateUnrealizedCheckpoints()
headRoot, err = f.Head(ctx, 2, [32]byte{}, []uint64{100}, 1)
require.NoError(t, err)
require.Equal(t, [32]byte{'c'}, headRoot)
}
//
//
// Epoch 1 Epoch 2 Epoch 3
// | |
// | |
// A <-- B <-- C <-- D <-- E <-- F <-- G <-- H |
// | \ |
// | --------------- I
// | |
//
// E justifies A. G justifies E.
//
func TestStore_NoDeadLock(t *testing.T) {
f := setup(0, 0)
ctx := context.Background()
// Epoch 1 blocks
require.NoError(t, f.InsertOptimisticBlock(ctx, 100, [32]byte{'a'}, params.BeaconConfig().ZeroHash, [32]byte{'A'}, 0, 0))
require.NoError(t, f.InsertOptimisticBlock(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, [32]byte{'B'}, 0, 0))
require.NoError(t, f.InsertOptimisticBlock(ctx, 102, [32]byte{'c'}, [32]byte{'b'}, [32]byte{'C'}, 0, 0))
require.NoError(t, f.InsertOptimisticBlock(ctx, 103, [32]byte{'d'}, [32]byte{'c'}, [32]byte{'D'}, 0, 0))
// Epoch 2 Blocks
require.NoError(t, f.InsertOptimisticBlock(ctx, 104, [32]byte{'e'}, [32]byte{'d'}, [32]byte{'E'}, 0, 0))
require.NoError(t, f.store.setUnrealizedJustifiedEpoch([32]byte{'e'}, 1))
require.NoError(t, f.InsertOptimisticBlock(ctx, 105, [32]byte{'f'}, [32]byte{'e'}, [32]byte{'F'}, 0, 0))
require.NoError(t, f.store.setUnrealizedJustifiedEpoch([32]byte{'f'}, 1))
require.NoError(t, f.InsertOptimisticBlock(ctx, 106, [32]byte{'g'}, [32]byte{'f'}, [32]byte{'G'}, 0, 0))
require.NoError(t, f.store.setUnrealizedJustifiedEpoch([32]byte{'g'}, 2))
require.NoError(t, f.store.setUnrealizedFinalizedEpoch([32]byte{'g'}, 1))
require.NoError(t, f.InsertOptimisticBlock(ctx, 107, [32]byte{'h'}, [32]byte{'g'}, [32]byte{'H'}, 0, 0))
require.NoError(t, f.store.setUnrealizedJustifiedEpoch([32]byte{'h'}, 2))
require.NoError(t, f.store.setUnrealizedFinalizedEpoch([32]byte{'h'}, 1))
// Add an attestation for h
f.ProcessAttestation(ctx, []uint64{0}, [32]byte{'h'}, 1)
// Epoch 3
// Current Head is H
headRoot, err := f.Head(ctx, 0, [32]byte{}, []uint64{100}, 0)
require.NoError(t, err)
require.Equal(t, [32]byte{'h'}, headRoot)
require.Equal(t, types.Epoch(0), f.JustifiedEpoch())
// Insert Block I, it becomes Head
require.NoError(t, f.InsertOptimisticBlock(ctx, 108, [32]byte{'i'}, [32]byte{'f'}, [32]byte{'I'}, 1, 0))
headRoot, err = f.Head(ctx, 1, [32]byte{}, []uint64{100}, 0)
require.NoError(t, err)
require.Equal(t, [32]byte{'i'}, headRoot)
require.Equal(t, types.Epoch(1), f.JustifiedEpoch())
require.Equal(t, types.Epoch(0), f.FinalizedEpoch())
// Realized Justified checkpoints, H becomes head
f.UpdateUnrealizedCheckpoints()
headRoot, err = f.Head(ctx, 1, [32]byte{}, []uint64{100}, 0)
require.NoError(t, err)
require.Equal(t, [32]byte{'h'}, headRoot)
require.Equal(t, types.Epoch(2), f.JustifiedEpoch())
require.Equal(t, types.Epoch(1), f.FinalizedEpoch())
}
// Epoch 1 | Epoch 2
// |
// -- D (late)
// / |
// A <- B <- C |
// \ |
// -- -- -- E <- F <- G <- H
// |
//
// D justifies and comes late.
//
func TestStore_ForkNextEpoch(t *testing.T) {
f := setup(0, 0)
ctx := context.Background()
// Epoch 1 blocks (D does not arrive)
require.NoError(t, f.InsertOptimisticBlock(ctx, 100, [32]byte{'a'}, params.BeaconConfig().ZeroHash, [32]byte{'A'}, 0, 0))
require.NoError(t, f.InsertOptimisticBlock(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, [32]byte{'B'}, 0, 0))
require.NoError(t, f.InsertOptimisticBlock(ctx, 102, [32]byte{'c'}, [32]byte{'b'}, [32]byte{'C'}, 0, 0))
// Epoch 2 blocks
require.NoError(t, f.InsertOptimisticBlock(ctx, 104, [32]byte{'e'}, [32]byte{'c'}, [32]byte{'E'}, 0, 0))
require.NoError(t, f.InsertOptimisticBlock(ctx, 105, [32]byte{'f'}, [32]byte{'e'}, [32]byte{'F'}, 0, 0))
require.NoError(t, f.InsertOptimisticBlock(ctx, 106, [32]byte{'g'}, [32]byte{'f'}, [32]byte{'G'}, 0, 0))
require.NoError(t, f.InsertOptimisticBlock(ctx, 107, [32]byte{'h'}, [32]byte{'g'}, [32]byte{'H'}, 0, 0))
// Insert an attestation to H, H is head
f.ProcessAttestation(ctx, []uint64{0}, [32]byte{'h'}, 1)
headRoot, err := f.Head(ctx, 0, [32]byte{}, []uint64{100}, 0)
require.NoError(t, err)
require.Equal(t, [32]byte{'h'}, headRoot)
require.Equal(t, types.Epoch(0), f.JustifiedEpoch())
// D arrives late, D is head
require.NoError(t, f.InsertOptimisticBlock(ctx, 103, [32]byte{'d'}, [32]byte{'c'}, [32]byte{'D'}, 0, 0))
require.NoError(t, f.store.setUnrealizedJustifiedEpoch([32]byte{'d'}, 1))
f.UpdateUnrealizedCheckpoints()
headRoot, err = f.Head(ctx, 0, [32]byte{}, []uint64{100}, 0)
require.NoError(t, err)
require.Equal(t, [32]byte{'d'}, headRoot)
require.Equal(t, types.Epoch(1), f.JustifiedEpoch())
require.Equal(t, uint64(0), f.store.nodeByRoot[[32]byte{'d'}].weight)
require.Equal(t, uint64(100), f.store.nodeByRoot[[32]byte{'h'}].weight)
}