Improve error message if hydra-node crashes

[ch1bo]

By delaying the connection exception based errors on the websocket client of the test driver, we improve the error output in cases where other assertions provide more info. For example, checkProcessHasNotDied prints the stderr of the crashed hydra-node.

This is something @cardenaso11 and me did when pairing today.

Instead of the often seen ConnectionClosed non-saying error we now (more consistently) get the reason why the hydra-node crashed:

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• CHANGELOG updated or not needed
• Documentation updated or not needed
• Haddocks updated or not needed
• No new TODOs introduced or explained herafter

[github-actions]

Transactions Costs

Sizes and execution budgets for Hydra protocol transactions. Note that unlisted parameters are currently using arbitrary values and results are not fully deterministic and comparable to previous runs.

Metadata
Generated at	2024-03-06 07:34:38.703837974 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	bccf2a430c016bc960fbf31b02694011cd399d20da8882aac9d33611	4110
νCommit	56b0f0b597150e619c76bed60683f3b1e42d7bc0685ed951b882bfc5	1975
νHead	86bff95ba20e9d1d1b34899a56d86bbacc9fed999260b27dcc92d128	9351
μHead	88f533cf67cd0fc93d7d9ccf0a8b1d69ffd1208a825efbebbc1d36ba*	4213

• The minting policy hash is only usable for comparison. As the script is parameterized, the actual script is unique per Head.

Cost of Init Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	4795	8.78	3.35	0.46
2	4993	10.87	4.16	0.49
3	5194	12.79	4.90	0.52
5	5600	16.58	6.35	0.58
10	6605	26.22	10.05	0.73
48	14249	99.77	38.28	1.86

Cost of Commit Transaction

This is using ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	591	10.24	4.04	0.29
2	780	13.88	5.64	0.34
3	970	17.66	7.29	0.39
5	1348	25.66	10.74	0.49
10	2283	48.19	20.30	0.79
19	3962	97.83	40.79	1.41

Cost of CollectCom Transaction

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	57	544	16.52	6.53	0.35
2	114	654	27.38	10.90	0.48
3	170	764	37.90	15.27	0.60
4	226	878	53.34	21.54	0.78
5	281	988	67.56	27.47	0.94
6	339	1099	84.23	34.42	1.13

Cost of Close Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	621	8.34	4.63	0.28
2	789	9.49	6.03	0.31
3	948	10.56	7.39	0.33
5	1299	12.16	9.81	0.38
10	1886	15.53	14.85	0.47
50	7928	49.95	62.53	1.35

Cost of Contest Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	644	8.65	4.75	0.28
2	753	9.38	5.80	0.30
3	889	10.03	6.84	0.32
5	1230	11.97	9.36	0.37
10	2120	17.74	16.49	0.51
50	7927	50.45	62.79	1.36

Cost of Abort Transaction

Some variation because of random mixture of still initial and already committed outputs.

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	4674	16.96	7.34	0.55
2	4778	27.98	12.19	0.67
3	4902	40.85	17.88	0.82
4	5127	59.18	26.09	1.04
5	5235	77.22	34.05	1.25
6	5377	98.31	43.30	1.49

Cost of FanOut Transaction

Involves spending head output and burning head tokens. Uses ada-only UTxO for better comparability.

Parties	UTxO	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
5	0	0	4627	7.85	3.28	0.44
5	1	57	4662	9.00	3.99	0.46
5	5	285	4797	13.61	6.84	0.52
5	10	568	4965	19.58	10.49	0.60
5	20	1140	5307	31.11	17.62	0.76
5	30	1708	5648	42.64	24.76	0.92
5	40	2279	5988	53.96	31.81	1.08
5	50	2848	6328	65.92	39.13	1.24
5	79	4497	7309	99.00	59.68	1.70

End-To-End Benchmark Results

This page is intended to collect the latest end-to-end benchmarks results produced by Hydra's Continuous Integration system from the latest master code.

Please take those results with a grain of salt as they are currently produced from very limited cloud VMs and not controlled hardware. Instead of focusing on the absolute results, the emphasis should be on relative results, eg. how the timings for a scenario evolve as the code changes.

Generated at 2024-03-06 07:36:57.041302612 UTC

Baseline Scenario

Number of nodes	3
Number of txs	9000
Avg. Confirmation Time (ms)	23.206098234
P99	116.35643358000002ms
P95	33.185115149999994ms
P50	20.248374499999997ms
Number of Invalid txs	0

Baseline Scenario

Number of nodes	1
Number of txs	3000
Avg. Confirmation Time (ms)	4.248940432
P99	6.509423399999999ms
P95	5.10841825ms
P50	4.1244505ms
Number of Invalid txs	0

[github-actions]

Test Results

418 tests  ±0   410 ✅ ±0   13m 38s ⏱️ -15s
139 suites ±0     8 💤 ±0 
  5 files   ±0     0 ❌ ±0 

Results for commit ac31c3f. ± Comparison against base commit 6fcc456.

♻️ This comment has been updated with latest results.