390 lines
9.8 KiB
Nim
390 lines
9.8 KiB
Nim
# beacon_chain
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# Copyright (c) 2018 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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# import ../interpreter # included to be able to use "suiteReport"
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proc setup_finality_02(): tuple[fork_choice: ForkChoiceBackend, ops: seq[Operation]] =
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var balances = @[Gwei(1), Gwei(1)]
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let GenesisRoot = fakeHash(0)
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# Initialize the fork choice context
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result.fork_choice = initForkChoiceBackend(
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justified_epoch = Epoch(1),
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finalized_epoch = Epoch(1),
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finalized_root = GenesisRoot
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).get()
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# ----------------------------------
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# Head should be genesis
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(1),
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(1),
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justified_state_balances: balances,
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expected_head: GenesisRoot
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)
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# Build the following tree.
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#
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# 0
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# / \
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# just: 0, fin: 0 -> 1 2 <- just: 0, fin: 0
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# | |
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# just: 1, fin: 0 -> 3 4 <- just: 0, fin: 0
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# | |
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# just: 1, fin: 0 -> 5 6 <- just: 0, fin: 0
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# | |
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# just: 1, fin: 0 -> 7 8 <- just: 1, fin: 0
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# | |
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# just: 2, fin: 0 -> 9 10 <- just: 2, fin: 0
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# Left branch
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(1),
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parent_root: GenesisRoot,
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blk_justified_epoch: Epoch(0),
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blk_finalized_epoch: Epoch(0)
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)
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(3),
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parent_root: fakeHash(1),
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blk_justified_epoch: Epoch(1),
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blk_finalized_epoch: Epoch(0)
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)
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(5),
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parent_root: fakeHash(3),
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blk_justified_epoch: Epoch(1),
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blk_finalized_epoch: Epoch(0)
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)
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(7),
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parent_root: fakeHash(5),
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blk_justified_epoch: Epoch(1),
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blk_finalized_epoch: Epoch(0)
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)
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(9),
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parent_root: fakeHash(7),
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blk_justified_epoch: Epoch(2),
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blk_finalized_epoch: Epoch(0)
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)
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# Build the following tree.
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#
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# 0
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# / \
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# just: 0, fin: 0 -> 1 2 <- just: 0, fin: 0
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# | |
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# just: 1, fin: 0 -> 3 4 <- just: 0, fin: 0
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# | |
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# just: 1, fin: 0 -> 5 6 <- just: 0, fin: 0
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# | |
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# just: 1, fin: 0 -> 7 8 <- just: 1, fin: 0
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# | |
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# just: 2, fin: 0 -> 9 10 <- just: 2, fin: 0
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# Right branch
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(2),
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parent_root: GenesisRoot,
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blk_justified_epoch: Epoch(0),
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blk_finalized_epoch: Epoch(0)
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)
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(4),
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parent_root: fakeHash(2),
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blk_justified_epoch: Epoch(0),
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blk_finalized_epoch: Epoch(0)
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)
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(6),
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parent_root: fakeHash(4),
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blk_justified_epoch: Epoch(0),
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blk_finalized_epoch: Epoch(0)
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)
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(8),
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parent_root: fakeHash(6),
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blk_justified_epoch: Epoch(1),
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blk_finalized_epoch: Epoch(0)
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)
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result.ops.add Operation(
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kind: ProcessBlock,
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root: fakeHash(10),
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parent_root: fakeHash(8),
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blk_justified_epoch: Epoch(2),
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blk_finalized_epoch: Epoch(0)
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)
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# Ensure that if we start at 0 we find 10 (just: 0, fin: 0).
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#
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# 0 <-- start
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# / \
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# 1 2
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# | |
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# 3 4
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# | |
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# 5 6
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# | |
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# 7 8
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# | |
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# 9 10 <-- head
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(0),
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(10)
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)
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# Same with justified_epoch 2
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(2),
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(10)
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)
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# Justified epoch 3 is invalid
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result.ops.add Operation(
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kind: InvalidFindHead,
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justified_epoch: Epoch(3), # <--- Wrong epoch
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances
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)
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# Add a vote to 1.
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#
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# 0
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# / \
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# +1 vote -> 1 2
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# | |
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# 3 4
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# | |
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# 5 6
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# | |
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# 7 8
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# 9 10
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result.ops.add Operation(
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kind: ProcessAttestation,
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validator_index: ValidatorIndex(0),
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block_root: fake_hash(1),
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target_epoch: Epoch(0)
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)
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# Ensure that if we start at 0 we find 9 (just: 0, fin: 0).
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#
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# 0 <-- start
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# / \
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# 1 2
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# | |
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# 3 4
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# 5 6
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# 7 8
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# head -> 9 10
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(0),
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(9)
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)
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# Same with justified_epoch 2
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(2),
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(9)
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)
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# Justified epoch 3 is invalid
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result.ops.add Operation(
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kind: InvalidFindHead,
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justified_epoch: Epoch(3), # <--- Wrong epoch
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances
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)
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# Add a vote to 2.
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#
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# 0
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# / \
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# 1 2 <- +1 vote
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# | |
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# 3 4
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# 5 6
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# 7 8
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# | |
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# 9 10
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result.ops.add Operation(
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kind: ProcessAttestation,
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validator_index: ValidatorIndex(1),
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block_root: fake_hash(2),
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target_epoch: Epoch(0)
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)
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# Ensure that if we start at 0 we find 10 again (just: 0, fin: 0).
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#
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# 0 <-- start
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# / \
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# 1 2
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# | |
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# 3 4
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# | |
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# 5 6
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# | |
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# 7 8
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# | |
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# 9 10 <-- head
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(0),
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(10)
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)
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# Same with justified_epoch 2
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(2),
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(10)
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)
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# Justified epoch 3 is invalid
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result.ops.add Operation(
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kind: InvalidFindHead,
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justified_epoch: Epoch(3), # <--- Wrong epoch
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justified_root: GenesisRoot,
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finalized_epoch: Epoch(0),
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justified_state_balances: balances
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)
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# Ensure that if we start at 1 (instead of 0) we find 9 (just: 0, fin: 0).
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#
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# 0
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# / \
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# start-> 1 2
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# | |
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# 3 4
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# | |
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# 5 6
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# | |
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# 7 8
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# | |
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# head -> 9 10
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(0),
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justified_root: fakeHash(1),
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(9)
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)
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# Same with justified_epoch 2
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(2),
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justified_root: fakeHash(1),
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(9)
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)
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# Justified epoch 3 is invalid
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result.ops.add Operation(
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kind: InvalidFindHead,
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justified_epoch: Epoch(3), # <--- Wrong epoch
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justified_root: fakeHash(1),
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finalized_epoch: Epoch(0),
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justified_state_balances: balances
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)
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# Ensure that if we start at 2 (instead of 0) we find 10 (just: 0, fin: 0).
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#
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# 0
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# / \
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# 1 2 <- start
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# | |
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# 3 4
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# 5 6
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# 7 8
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# | |
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# 9 10 <- head
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(0),
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justified_root: fakeHash(2),
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(10)
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)
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# Same with justified_epoch 2
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result.ops.add Operation(
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kind: FindHead,
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justified_epoch: Epoch(2),
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justified_root: fakeHash(2),
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finalized_epoch: Epoch(0),
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justified_state_balances: balances,
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expected_head: fakeHash(10)
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)
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# Justified epoch 3 is invalid
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result.ops.add Operation(
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kind: InvalidFindHead,
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justified_epoch: Epoch(3), # <--- Wrong epoch
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justified_root: fakeHash(2),
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finalized_epoch: Epoch(0),
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justified_state_balances: balances
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)
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proc test_ffg02() =
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timedTest "fork_choice - testing finality #02":
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# for i in 0 ..< 12:
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# echo " block (", i, ") hash: ", fakeHash(i)
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# echo " ------------------------------------------------------"
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var (ctx, ops) = setup_finality_02()
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ctx.run(ops)
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test_ffg02()
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