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Add a test of the new channel saturation limit

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Matt Corallo 2022-07-09 04:24:22 +00:00
parent a02982fbba
commit e6d40a7c0e
1 changed files with 44 additions and 0 deletions
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44
lightning/src/routing/router.rs
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@ -5722,6 +5722,50 @@ mod tests {
}
}
#[test]
fn avoids_saturating_channels() {
let (secp_ctx, network_graph, gossip_sync, _, logger) = build_graph();
let (_, our_id, privkeys, nodes) = get_nodes(&secp_ctx);
let scorer = ProbabilisticScorer::new(Default::default(), &*network_graph, Arc::clone(&logger));
// Set the fee on channel 13 to 100% to match channel 4 giving us two equivalent paths (us
// -> node 7 -> node2 and us -> node 1 -> node 2) which we should balance over.
update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
chain_hash: genesis_block(Network::Testnet).header.block_hash(),
short_channel_id: 4,
timestamp: 2,
flags: 0,
cltv_expiry_delta: (4 << 4) | 1,
htlc_minimum_msat: 0,
htlc_maximum_msat: OptionalField::Present(200_000_000),
fee_base_msat: 0,
fee_proportional_millionths: 0,
excess_data: Vec::new()
});
update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
chain_hash: genesis_block(Network::Testnet).header.block_hash(),
short_channel_id: 13,
timestamp: 2,
flags: 0,
cltv_expiry_delta: (13 << 4) | 1,
htlc_minimum_msat: 0,
htlc_maximum_msat: OptionalField::Present(200_000_000),
fee_base_msat: 0,
fee_proportional_millionths: 0,
excess_data: Vec::new()
});
let payment_params = PaymentParameters::from_node_id(nodes[2]).with_features(InvoiceFeatures::known());
let keys_manager = test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
let random_seed_bytes = keys_manager.get_secure_random_bytes();
// 150,000 sat is less than the available liquidity on each channel, set above.
let route = get_route(&our_id, &payment_params, &network_graph.read_only(), None, 150_000_000, 42, Arc::clone(&logger), &scorer, &random_seed_bytes).unwrap();
assert_eq!(route.paths.len(), 2);
assert!((route.paths[0][1].short_channel_id == 4 && route.paths[1][1].short_channel_id == 13) ||
(route.paths[1][1].short_channel_id == 4 && route.paths[0][1].short_channel_id == 13));
}
#[cfg(not(feature = "no-std"))]
pub(super) fn random_init_seed() -> u64 {
// Because the default HashMap in std pulls OS randomness, we can use it as a (bad) RNG.