Make hydra-cluster --devnet configurable

[ch1bo]

By default it will now open a head and wait again and only when given --busy, the head is busy respending the same head.

This allows to verify interactions with a open head interactively quickly by just doing:

cabal build hydra-cluster
hydra_cluster_datadir=hydra-cluster cabal exec hydra-cluster -- --devnet --publish-hydra-scripts

This is particularly handy when writing the user manual.

---

• 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	2024-05-09 07:41:04.971657714 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	4794	8.82	3.37	0.46
2	4993	10.61	4.05	0.48
3	5196	12.55	4.80	0.51
5	5600	16.43	6.29	0.57
10	6605	26.50	10.17	0.73
48	14242	99.87	38.32	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	554	10.24	4.04	0.29
2	748	13.88	5.64	0.34
3	933	17.66	7.29	0.39
5	1305	25.66	10.74	0.49
10	2241	48.19	20.30	0.78
19	3935	97.83	40.79	1.41

Cost of CollectCom Transaction

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	57	544	16.88	6.67	0.36
2	113	654	27.35	10.88	0.48
3	169	764	39.72	15.93	0.62
4	226	874	50.67	20.55	0.75
5	283	984	67.25	27.39	0.93
6	339	1095	87.38	35.57	1.16

Cost of Close Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	524	8.01	3.80	0.27
2	751	8.96	5.65	0.30
3	906	10.11	7.05	0.32
5	1236	11.89	9.49	0.37
10	2163	17.05	16.21	0.50
50	8053	51.14	63.32	1.37

Cost of Contest Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	644	8.69	4.76	0.28
2	808	9.75	6.12	0.31
3	1012	11.01	7.60	0.34
5	1174	11.40	8.97	0.36
10	2128	17.43	16.31	0.50
50	8084	52.28	63.91	1.39

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	4698	17.00	7.37	0.55
2	4771	27.96	12.18	0.67
3	4847	39.79	17.35	0.81
4	5066	57.21	25.18	1.02
5	5262	78.43	34.52	1.26
6	5350	98.21	43.25	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	8.06	3.37	0.44
5	1	56	4660	9.00	3.99	0.46
5	5	284	4797	13.82	6.93	0.52
5	10	570	4968	19.79	10.58	0.61
5	20	1142	5309	31.11	17.62	0.76
5	30	1710	5649	42.43	24.67	0.92
5	40	2273	5983	53.96	31.81	1.08
5	50	2846	6325	65.29	38.86	1.24
5	79	4499	7311	99.21	59.77	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 2024-05-09 07:44:56.139310185 UTC

Baseline Scenario

Number of nodes	3
Number of txs	9000
Avg. Confirmation Time (ms)	22.032744595
P99	111.11295025ms
P95	31.34708739999999ms
P50	19.498683999999997ms
Number of Invalid txs	0

Baseline Scenario

Number of nodes	1
Number of txs	3000
Avg. Confirmation Time (ms)	4.309602415
P99	7.186194369999971ms
P95	5.480806099999998ms
P50	4.146235ms
Number of Invalid txs	0

[github-actions]

Test Results

426 tests  ±0   416 ✅ ±0   14m 32s ⏱️ ±0s
138 suites ±0    10 💤 ±0 
  2 files   ±0     0 ❌ ±0 

Results for commit 8e65f5a. ± Comparison against base commit 7d66414.