124 lines
3.7 KiB
Nim
124 lines
3.7 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2022 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 "suite"
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func setup_finality_01(): tuple[fork_choice: ForkChoiceBackend, ops: seq[Operation]] =
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let 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 = ForkChoiceBackend.init(
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justifiedCheckpoint = Checkpoint(root: GenesisRoot, epoch: Epoch(0)),
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finalizedCheckpoint = Checkpoint(root: GenesisRoot, epoch: Epoch(0)),
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true # use proposer boosting, though the proposer boost root not set
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)
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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_checkpoint: Checkpoint(root: GenesisRoot, epoch: Epoch(0)),
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finalized_checkpoint: Checkpoint(root: GenesisRoot, epoch: Epoch(0)),
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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 chain
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#
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# 0 <- just: 0, fin: 0
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# |
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# 1 <- just: 0, fin: 0
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# |
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# 2 <- just: 1, fin: 0
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# |
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# 3 <- just: 2, fin: 1
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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_checkpoint: Checkpoint(root: GenesisRoot, epoch: Epoch(0)),
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blk_finalized_checkpoint: Checkpoint(root: GenesisRoot, 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(2),
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parent_root: fakeHash(1),
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blk_justified_checkpoint: Checkpoint(root: fakeHash(1), epoch: Epoch(1)),
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blk_finalized_checkpoint: Checkpoint(root: GenesisRoot, 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(2),
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blk_justified_checkpoint: Checkpoint(root: fakeHash(2), epoch: Epoch(2)),
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blk_finalized_checkpoint: Checkpoint(root: fakeHash(1), epoch: Epoch(1))
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)
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# Ensure that with justified epoch 0 we find 3
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#
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# 0 <- start
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# |
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# 1
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# |
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# 2
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# |
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# 3 <- head
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result.ops.add Operation(
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kind: FindHead,
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justified_checkpoint: Checkpoint(root: GenesisRoot, epoch: Epoch(0)),
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finalized_checkpoint: Checkpoint(root: GenesisRoot, epoch: Epoch(0)),
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justified_state_balances: balances,
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expected_head: fakeHash(3)
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)
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# Ensure that with justified epoch 1 we find 2
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#
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# 0
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# |
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# 1
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# |
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# 2 <- start
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# |
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# 3 <- head
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result.ops.add Operation(
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kind: FindHead,
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justified_checkpoint: Checkpoint(root: fakeHash(1), epoch: Epoch(1)),
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finalized_checkpoint: Checkpoint(root: GenesisRoot, epoch: Epoch(0)),
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justified_state_balances: balances,
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expected_head: fakeHash(2)
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)
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# Ensure that with justified epoch 2 we find 3
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#
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# 0
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# |
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# 1
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# |
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# 2
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# |
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# 3 <- start + head
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result.ops.add Operation(
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kind: FindHead,
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justified_checkpoint: Checkpoint(root: fakeHash(2), epoch: Epoch(2)),
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finalized_checkpoint: Checkpoint(root: fakeHash(1), epoch: Epoch(1)),
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justified_state_balances: balances,
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expected_head: fakeHash(3)
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)
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proc test_ffg01() =
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test "fork_choice - testing finality #01":
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# for i in 0 ..< 4:
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# echo " block (", i, ") hash: ", fakeHash(i)
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# echo " ------------------------------------------------------"
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var (ctx, ops) = setup_finality_01()
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ctx.run(ops)
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test_ffg01()
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