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1100 lines
30 KiB
Rust
1100 lines
30 KiB
Rust
use proto_array_fork_choice::ProtoArrayForkChoice;
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use types::{Epoch, Hash256, Slot};
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#[test]
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fn no_votes() {
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let test = get_no_votes_test_definition();
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test.run();
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}
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#[test]
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fn votes() {
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let test = get_votes_test_definition();
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test.run();
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}
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#[derive(Debug, Clone)]
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pub enum Operation {
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FindHead {
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justified_epoch: Epoch,
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justified_root: Hash256,
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finalized_epoch: Epoch,
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justified_state_balances: Vec<u64>,
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expected_head: Hash256,
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},
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InvalidFindHead {
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justified_epoch: Epoch,
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justified_root: Hash256,
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finalized_epoch: Epoch,
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justified_state_balances: Vec<u64>,
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},
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ProcessBlock {
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slot: Slot,
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root: Hash256,
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parent_root: Hash256,
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justified_epoch: Epoch,
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finalized_epoch: Epoch,
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},
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ProcessAttestation {
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validator_index: usize,
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block_root: Hash256,
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target_epoch: Epoch,
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},
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Prune {
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finalized_epoch: Epoch,
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finalized_root: Hash256,
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prune_threshold: usize,
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expected_len: usize,
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},
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}
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pub struct ForkChoiceTestDefinition {
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pub finalized_block_slot: Slot,
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pub justified_epoch: Epoch,
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pub finalized_epoch: Epoch,
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pub finalized_root: Hash256,
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pub operations: Vec<Operation>,
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}
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impl ForkChoiceTestDefinition {
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fn run(self) {
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let fork_choice = ProtoArrayForkChoice::new(
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self.finalized_block_slot,
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self.justified_epoch,
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self.finalized_epoch,
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self.finalized_root,
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)
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.expect("should create fork choice struct");
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for (op_index, op) in self.operations.into_iter().enumerate() {
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match op.clone() {
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Operation::FindHead {
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justified_epoch,
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justified_root,
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finalized_epoch,
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justified_state_balances,
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expected_head,
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} => {
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let head = fork_choice
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.find_head(
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justified_epoch,
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justified_root,
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finalized_epoch,
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&justified_state_balances,
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)
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.expect(&format!(
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"find_head op at index {} returned error",
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op_index
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));
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assert_eq!(
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head, expected_head,
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"Operation at index {} failed checks. Operation: {:?}",
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op_index, op
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);
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check_bytes_round_trip(&fork_choice);
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}
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Operation::InvalidFindHead {
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justified_epoch,
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justified_root,
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finalized_epoch,
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justified_state_balances,
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} => {
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let result = fork_choice.find_head(
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justified_epoch,
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justified_root,
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finalized_epoch,
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&justified_state_balances,
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);
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assert!(
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result.is_err(),
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"Operation at index {} . Operation: {:?}",
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op_index,
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op
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);
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check_bytes_round_trip(&fork_choice);
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}
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Operation::ProcessBlock {
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slot,
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root,
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parent_root,
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justified_epoch,
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finalized_epoch,
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} => {
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fork_choice
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.process_block(slot, root, parent_root, justified_epoch, finalized_epoch)
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.expect(&format!(
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"process_block op at index {} returned error",
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op_index
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));
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check_bytes_round_trip(&fork_choice);
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}
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Operation::ProcessAttestation {
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validator_index,
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block_root,
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target_epoch,
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} => {
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fork_choice
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.process_attestation(validator_index, block_root, target_epoch)
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.expect(&format!(
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"process_attestation op at index {} returned error",
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op_index
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));
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check_bytes_round_trip(&fork_choice);
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}
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Operation::Prune {
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finalized_epoch,
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finalized_root,
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prune_threshold,
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expected_len,
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} => {
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fork_choice.set_prune_threshold(prune_threshold);
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fork_choice
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.update_finalized_root(finalized_epoch, finalized_root)
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.expect("update_finalized_root op at index {} returned error");
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// Ensure that no pruning happened.
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assert_eq!(
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fork_choice.len(),
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expected_len,
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"Prune op at index {} failed with {} instead of {}",
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op_index,
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fork_choice.len(),
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expected_len
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);
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}
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}
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}
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}
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}
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/// Gives a hash that is not the zero hash (unless i is `usize::max_value)`.
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fn get_hash(i: u64) -> Hash256 {
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Hash256::from_low_u64_be(i)
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}
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fn check_bytes_round_trip(original: &ProtoArrayForkChoice) {
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let bytes = original.as_bytes();
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let decoded =
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ProtoArrayForkChoice::from_bytes(&bytes).expect("fork choice should decode from bytes");
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assert!(
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*original == decoded,
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"fork choice should encode and decode without change"
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);
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}
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fn get_no_votes_test_definition() -> ForkChoiceTestDefinition {
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let balances = vec![0; 16];
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let operations = vec![
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// Check that the head is the finalized block.
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Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: Hash256::zero(),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: Hash256::zero(),
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},
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// Add block 2
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//
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// 0
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// /
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// 2
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Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(2),
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parent_root: get_hash(0),
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justified_epoch: Epoch::new(1),
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finalized_epoch: Epoch::new(1),
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},
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// Ensure the head is 2
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//
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// 0
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// /
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// 2 <- head
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Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: Hash256::zero(),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(2),
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},
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// Add block 1
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//
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// 0
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// / \
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// 2 1
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Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(1),
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parent_root: get_hash(0),
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justified_epoch: Epoch::new(1),
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finalized_epoch: Epoch::new(1),
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},
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// Ensure the head is still 2
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//
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// 0
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// / \
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// head-> 2 1
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Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: Hash256::zero(),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(2),
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},
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// Add block 3
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//
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// 0
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// / \
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// 2 1
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// |
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// 3
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Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(3),
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parent_root: get_hash(1),
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justified_epoch: Epoch::new(1),
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finalized_epoch: Epoch::new(1),
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},
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// Ensure 2 is still the head
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//
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// 0
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// / \
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// head-> 2 1
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// |
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// 3
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Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: Hash256::zero(),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(2),
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},
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// Add block 4
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//
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// 0
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// / \
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// 2 1
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// | |
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// 4 3
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Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(4),
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parent_root: get_hash(2),
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justified_epoch: Epoch::new(1),
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finalized_epoch: Epoch::new(1),
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},
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// Ensure the head is 4.
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//
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// 0
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// / \
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// 2 1
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// | |
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// head-> 4 3
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Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: Hash256::zero(),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(4),
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},
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// Add block 5 with a justified epoch of 2
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//
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// 0
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// / \
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// 2 1
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// | |
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// 4 3
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// |
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// 5 <- justified epoch = 2
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Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(5),
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parent_root: get_hash(4),
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justified_epoch: Epoch::new(2),
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finalized_epoch: Epoch::new(1),
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},
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// Ensure the head is still 4 whilst the justified epoch is 0.
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//
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// 0
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// / \
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// 2 1
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// | |
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// head-> 4 3
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// |
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// 5
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Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: Hash256::zero(),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(4),
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},
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// Ensure there is an error when starting from a block that has the wrong justified epoch.
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//
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// 0
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// / \
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// 2 1
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// | |
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// 4 3
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// |
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// 5 <- starting from 5 with justified epoch 0 should error.
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Operation::InvalidFindHead {
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justified_epoch: Epoch::new(1),
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justified_root: get_hash(5),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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},
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// Set the justified epoch to 2 and the start block to 5 and ensure 5 is the head.
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//
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// 0
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// / \
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// 2 1
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// | |
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// 4 3
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// |
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// 5 <- head
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Operation::FindHead {
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justified_epoch: Epoch::new(2),
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justified_root: get_hash(5),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(5),
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},
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// Add block 6
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//
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// 0
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// / \
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// 2 1
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// | |
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// 4 3
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// |
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// 5
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// |
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// 6
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Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(6),
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parent_root: get_hash(5),
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justified_epoch: Epoch::new(2),
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finalized_epoch: Epoch::new(1),
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},
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// Ensure 6 is the head
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//
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// 0
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// / \
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// 2 1
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// | |
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// 4 3
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// |
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// 5
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// |
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// 6 <- head
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Operation::FindHead {
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justified_epoch: Epoch::new(2),
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justified_root: get_hash(5),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(6),
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},
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];
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ForkChoiceTestDefinition {
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finalized_block_slot: Slot::new(0),
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justified_epoch: Epoch::new(1),
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finalized_epoch: Epoch::new(1),
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finalized_root: get_hash(0),
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operations,
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}
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}
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fn get_votes_test_definition() -> ForkChoiceTestDefinition {
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let mut balances = vec![1; 2];
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let mut ops = vec![];
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// Ensure that the head starts at the finalized block.
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ops.push(Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: get_hash(0),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(0),
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});
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// Add a block with a hash of 2.
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//
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// 0
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// /
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// 2
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ops.push(Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(2),
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parent_root: get_hash(0),
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justified_epoch: Epoch::new(1),
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finalized_epoch: Epoch::new(1),
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});
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// Ensure that the head is 2
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//
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// 0
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// /
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// head-> 2
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ops.push(Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: get_hash(0),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(2),
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});
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// Add a block with a hash of 1 that comes off the genesis block (this is a fork compared
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// to the previous block).
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//
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// 0
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// / \
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// 2 1
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ops.push(Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(1),
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parent_root: get_hash(0),
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justified_epoch: Epoch::new(1),
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finalized_epoch: Epoch::new(1),
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});
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// Ensure that the head is still 2
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//
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// 0
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// / \
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// head-> 2 1
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ops.push(Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: get_hash(0),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(2),
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});
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// Add a vote to block 1
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//
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// 0
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// / \
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// 2 1 <- +vote
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ops.push(Operation::ProcessAttestation {
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validator_index: 0,
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block_root: get_hash(1),
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target_epoch: Epoch::new(2),
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});
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// Ensure that the head is now 1, beacuse 1 has a vote.
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//
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// 0
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// / \
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// 2 1 <- head
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ops.push(Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: get_hash(0),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(1),
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});
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// Add a vote to block 2
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//
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// 0
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// / \
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// +vote-> 2 1
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ops.push(Operation::ProcessAttestation {
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validator_index: 1,
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block_root: get_hash(2),
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target_epoch: Epoch::new(2),
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});
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// Ensure that the head is 2 since 1 and 2 both have a vote
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//
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// 0
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// / \
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// head-> 2 1
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ops.push(Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: get_hash(0),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(2),
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});
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// Add block 3.
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//
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// 0
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// / \
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// 2 1
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// |
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// 3
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ops.push(Operation::ProcessBlock {
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slot: Slot::new(0),
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root: get_hash(3),
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parent_root: get_hash(1),
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justified_epoch: Epoch::new(1),
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finalized_epoch: Epoch::new(1),
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});
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// Ensure that the head is still 2
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//
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// 0
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// / \
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// head-> 2 1
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// |
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// 3
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ops.push(Operation::FindHead {
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justified_epoch: Epoch::new(1),
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justified_root: get_hash(0),
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finalized_epoch: Epoch::new(1),
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justified_state_balances: balances.clone(),
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expected_head: get_hash(2),
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});
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// Move validator #0 vote from 1 to 3
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//
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// 0
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// / \
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// 2 1 <- -vote
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// |
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// 3 <- +vote
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ops.push(Operation::ProcessAttestation {
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validator_index: 0,
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block_root: get_hash(3),
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target_epoch: Epoch::new(3),
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});
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// Ensure that the head is still 2
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//
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// 0
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// / \
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// head-> 2 1
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// |
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// 3
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|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(1),
|
|
justified_root: get_hash(0),
|
|
finalized_epoch: Epoch::new(1),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(2),
|
|
});
|
|
|
|
// Move validator #1 vote from 2 to 1 (this is an equivocation, but fork choice doesn't
|
|
// care)
|
|
//
|
|
// 0
|
|
// / \
|
|
// -vote-> 2 1 <- +vote
|
|
// |
|
|
// 3
|
|
ops.push(Operation::ProcessAttestation {
|
|
validator_index: 1,
|
|
block_root: get_hash(1),
|
|
target_epoch: Epoch::new(3),
|
|
});
|
|
|
|
// Ensure that the head is now 3
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3 <- head
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(1),
|
|
justified_root: get_hash(0),
|
|
finalized_epoch: Epoch::new(1),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(3),
|
|
});
|
|
|
|
// Add block 4.
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
ops.push(Operation::ProcessBlock {
|
|
slot: Slot::new(0),
|
|
root: get_hash(4),
|
|
parent_root: get_hash(3),
|
|
justified_epoch: Epoch::new(1),
|
|
finalized_epoch: Epoch::new(1),
|
|
});
|
|
|
|
// Ensure that the head is now 4
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4 <- head
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(1),
|
|
justified_root: get_hash(0),
|
|
finalized_epoch: Epoch::new(1),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(4),
|
|
});
|
|
|
|
// Add block 5, which has a justified epoch of 2.
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// /
|
|
// 5 <- justified epoch = 2
|
|
ops.push(Operation::ProcessBlock {
|
|
slot: Slot::new(0),
|
|
root: get_hash(5),
|
|
parent_root: get_hash(4),
|
|
justified_epoch: Epoch::new(2),
|
|
finalized_epoch: Epoch::new(2),
|
|
});
|
|
|
|
// Ensure that 5 is filtered out and the head stays at 4.
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4 <- head
|
|
// /
|
|
// 5
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(1),
|
|
justified_root: get_hash(0),
|
|
finalized_epoch: Epoch::new(1),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(4),
|
|
});
|
|
|
|
// Add block 6, which has a justified epoch of 0.
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// 5 6 <- justified epoch = 0
|
|
ops.push(Operation::ProcessBlock {
|
|
slot: Slot::new(0),
|
|
root: get_hash(6),
|
|
parent_root: get_hash(4),
|
|
justified_epoch: Epoch::new(1),
|
|
finalized_epoch: Epoch::new(1),
|
|
});
|
|
|
|
// Move both votes to 5.
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// +2 vote-> 5 6
|
|
ops.push(Operation::ProcessAttestation {
|
|
validator_index: 0,
|
|
block_root: get_hash(5),
|
|
target_epoch: Epoch::new(4),
|
|
});
|
|
ops.push(Operation::ProcessAttestation {
|
|
validator_index: 1,
|
|
block_root: get_hash(5),
|
|
target_epoch: Epoch::new(4),
|
|
});
|
|
|
|
// Add blocks 7, 8 and 9. Adding these blocks helps test the `best_descendant`
|
|
// functionality.
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// /
|
|
// 9
|
|
ops.push(Operation::ProcessBlock {
|
|
slot: Slot::new(0),
|
|
root: get_hash(7),
|
|
parent_root: get_hash(5),
|
|
justified_epoch: Epoch::new(2),
|
|
finalized_epoch: Epoch::new(2),
|
|
});
|
|
ops.push(Operation::ProcessBlock {
|
|
slot: Slot::new(0),
|
|
root: get_hash(8),
|
|
parent_root: get_hash(7),
|
|
justified_epoch: Epoch::new(2),
|
|
finalized_epoch: Epoch::new(2),
|
|
});
|
|
ops.push(Operation::ProcessBlock {
|
|
slot: Slot::new(0),
|
|
root: get_hash(9),
|
|
parent_root: get_hash(8),
|
|
justified_epoch: Epoch::new(2),
|
|
finalized_epoch: Epoch::new(2),
|
|
});
|
|
|
|
// Ensure that 6 is the head, even though 5 has all the votes. This is testing to ensure
|
|
// that 5 is filtered out due to a differing justified epoch.
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// 5 6 <- head
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// /
|
|
// 9
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(1),
|
|
justified_root: get_hash(0),
|
|
finalized_epoch: Epoch::new(1),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(6),
|
|
});
|
|
|
|
// Change fork-choice justified epoch to 1, and the start block to 5 and ensure that 9 is
|
|
// the head.
|
|
//
|
|
// << Change justified epoch to 1 >>
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// /
|
|
// head-> 9
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(9),
|
|
});
|
|
|
|
// Change fork-choice justified epoch to 1, and the start block to 5 and ensure that 9 is
|
|
// the head.
|
|
//
|
|
// << Change justified epoch to 1 >>
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// /
|
|
// 9 <- +2 votes
|
|
ops.push(Operation::ProcessAttestation {
|
|
validator_index: 0,
|
|
block_root: get_hash(9),
|
|
target_epoch: Epoch::new(5),
|
|
});
|
|
ops.push(Operation::ProcessAttestation {
|
|
validator_index: 1,
|
|
block_root: get_hash(9),
|
|
target_epoch: Epoch::new(5),
|
|
});
|
|
|
|
// Add block 10
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// / \
|
|
// 9 10
|
|
ops.push(Operation::ProcessBlock {
|
|
slot: Slot::new(0),
|
|
root: get_hash(10),
|
|
parent_root: get_hash(8),
|
|
justified_epoch: Epoch::new(2),
|
|
finalized_epoch: Epoch::new(2),
|
|
});
|
|
|
|
// Double-check the head is still 9 (no diagram this time)
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(9),
|
|
});
|
|
|
|
// Introduce 2 more validators into the system
|
|
balances = vec![1; 4];
|
|
|
|
// Have the two new validators vote for 10
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// / \
|
|
// 9 10 <- +2 votes
|
|
ops.push(Operation::ProcessAttestation {
|
|
validator_index: 2,
|
|
block_root: get_hash(10),
|
|
target_epoch: Epoch::new(5),
|
|
});
|
|
ops.push(Operation::ProcessAttestation {
|
|
validator_index: 3,
|
|
block_root: get_hash(10),
|
|
target_epoch: Epoch::new(5),
|
|
});
|
|
|
|
// Check the head is now 10.
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// / \
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// / \
|
|
// 9 10 <- head
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(10),
|
|
});
|
|
|
|
// Set the balances of the last two validators to zero
|
|
balances = vec![1, 1, 0, 0];
|
|
|
|
// Check the head is 9 again.
|
|
//
|
|
// .
|
|
// .
|
|
// .
|
|
// |
|
|
// 8
|
|
// / \
|
|
// head-> 9 10
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(9),
|
|
});
|
|
|
|
// Set the balances of the last two validators back to 1
|
|
balances = vec![1; 4];
|
|
|
|
// Check the head is 10.
|
|
//
|
|
// .
|
|
// .
|
|
// .
|
|
// |
|
|
// 8
|
|
// / \
|
|
// 9 10 <- head
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(10),
|
|
});
|
|
|
|
// Remove the last two validators
|
|
balances = vec![1; 2];
|
|
|
|
// Check the head is 9 again.
|
|
//
|
|
// (prior blocks omitted for brevity)
|
|
// .
|
|
// .
|
|
// .
|
|
// |
|
|
// 8
|
|
// / \
|
|
// head-> 9 10
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(9),
|
|
});
|
|
|
|
// Ensure that pruning below the prune threshold does not prune.
|
|
ops.push(Operation::Prune {
|
|
finalized_epoch: Epoch::new(2),
|
|
finalized_root: get_hash(5),
|
|
prune_threshold: usize::max_value(),
|
|
expected_len: 11,
|
|
});
|
|
|
|
// Run find-head, ensure the no-op prune didn't change the head.
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(9),
|
|
});
|
|
|
|
// Ensure that pruning above the prune threshold does prune.
|
|
//
|
|
//
|
|
// 0
|
|
// / \
|
|
// 2 1
|
|
// |
|
|
// 3
|
|
// |
|
|
// 4
|
|
// -------pruned here ------
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// / \
|
|
// 9 10
|
|
ops.push(Operation::Prune {
|
|
finalized_epoch: Epoch::new(2),
|
|
finalized_root: get_hash(5),
|
|
prune_threshold: 1,
|
|
expected_len: 6,
|
|
});
|
|
|
|
// Run find-head, ensure the prune didn't change the head.
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(9),
|
|
});
|
|
|
|
// Add block 11
|
|
//
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// / \
|
|
// 9 10
|
|
// |
|
|
// 11
|
|
ops.push(Operation::ProcessBlock {
|
|
slot: Slot::new(0),
|
|
root: get_hash(11),
|
|
parent_root: get_hash(9),
|
|
justified_epoch: Epoch::new(2),
|
|
finalized_epoch: Epoch::new(2),
|
|
});
|
|
|
|
// Ensure the head is now 11
|
|
//
|
|
// 5 6
|
|
// |
|
|
// 7
|
|
// |
|
|
// 8
|
|
// / \
|
|
// 9 10
|
|
// |
|
|
// head-> 11
|
|
ops.push(Operation::FindHead {
|
|
justified_epoch: Epoch::new(2),
|
|
justified_root: get_hash(5),
|
|
finalized_epoch: Epoch::new(2),
|
|
justified_state_balances: balances.clone(),
|
|
expected_head: get_hash(11),
|
|
});
|
|
|
|
ForkChoiceTestDefinition {
|
|
finalized_block_slot: Slot::new(0),
|
|
justified_epoch: Epoch::new(1),
|
|
finalized_epoch: Epoch::new(1),
|
|
finalized_root: get_hash(0),
|
|
operations: ops,
|
|
}
|
|
}
|