Provide additional consequence related to obtaining HeadId

[v0d1ch]

---

• 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	2023-11-20 13:58:18.690118045 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	57dd0a3aba3f4477afed74e7d12b6e86d7abad22ee51612ff81b4194	4059
νCommit	171a1e6bdbc8aa96d957a65b3f505517386af06ba265e3f784741f67	2050
νHead	e89b0c4a6155bac2434d1e500bd49c155b2b56744ccf5a0efa72a82e	9092
μHead	92368af5649999c05211407d9a837cdd10ecf98c5829b385e89a3648*	4062

• 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	4594	11.01	4.37	0.47
2	4799	13.39	5.29	0.51
3	5008	15.42	6.05	0.54
5	5414	19.72	7.69	0.60
10	6439	30.71	11.88	0.77
41	12796	99.67	38.21	1.79

Cost of Commit Transaction

This is using ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	537	12.23	4.81	0.31
2	726	15.93	6.48	0.36
3	914	19.77	8.20	0.41
5	1284	27.87	11.80	0.52
10	2220	50.58	21.69	0.81
18	3722	94.20	40.16	1.36

Cost of CollectCom Transaction

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	56	483	22.20	8.87	0.41
2	114	593	34.81	14.01	0.56
3	170	703	48.36	19.64	0.71
4	226	813	64.63	26.36	0.90
5	282	923	82.57	33.82	1.10

Cost of Close Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	551	17.76	8.35	0.38
2	745	19.48	9.97	0.41
3	803	20.28	10.86	0.43
5	1282	24.73	14.85	0.51
10	1918	31.09	21.15	0.64
50	8974	96.21	83.28	1.92

Cost of Contest Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	591	21.33	9.72	0.42
2	745	23.31	11.40	0.45
3	969	25.16	13.10	0.49
5	1231	28.70	16.21	0.55
10	2171	37.59	24.20	0.72
45	8021	98.84	79.26	1.87

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	4544	20.18	8.78	0.58
2	4709	33.94	14.95	0.74
3	4905	50.39	22.35	0.93
4	5073	69.39	30.89	1.16
5	5120	84.77	37.55	1.33

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	4416	9.08	3.82	0.45
5	1	57	4452	10.51	4.67	0.46
5	5	284	4596	15.46	7.75	0.53
5	10	569	4775	22.18	11.81	0.62
5	20	1139	5136	34.69	19.56	0.80
5	30	1710	5498	47.90	27.60	0.98
5	40	2277	5855	60.89	35.55	1.16
5	50	2844	6212	73.88	43.51	1.33
5	69	3928	6898	98.67	58.67	1.67

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 2023-11-20 13:52:16.911791008 UTC

3-nodes Scenario

A rather typical setup, with 3 nodes forming a Hydra head.

Number of nodes	3
Number of txs	900
Avg. Confirmation Time (ms)	22.939895213
P99	115.65214025ms
P95	30.960022499999997ms
P50	20.099713ms
Number of Invalid txs	0

Baseline Scenario

This scenario represents a minimal case and as such is a good baseline against which to assess the overhead introduced by more complex setups. There is a single hydra-node d with a single client submitting single input and single output transactions with a constant UTxO set of 1.

Number of nodes	1
Number of txs	300
Avg. Confirmation Time (ms)	3.905823313
P99	4.842332389999994ms
P95	4.448449800000001ms
P50	3.8340305ms
Number of Invalid txs	0

[github-actions]

Test Results

368 tests  ±0   363 ✔️ ±0   21m 29s ⏱️ -49s
124 suites ±0       5 💤 ±0 
    5 files   ±0       0 ❌ ±0 

Results for commit a1192df. ± Comparison against base commit 4cc76a4.

[v0d1ch]

We altered the decision here and the actuall PR will contain the updated ADR document