ADR to use cbor for tx

[abailly-iohk]

Related to #1213

---

• 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	2024-01-16 08:14:38.876130617 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	985245919fcc6c0c5cd116023cd2c947c43e80dcbb5075fe12433fbb	4072
νCommit	7cb20fa71eb4c563ca283566ebe0aa65859d96c3f8cba35c52c181fd	2043
νHead	7a36661f5c15e9f1783aeaab890812c59b7286cbbc6de762d3110772	8816
μHead	8b111ac12274e46314769295a1c5dcab1d260096fc469fd698065463*	3851

• 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	4372	10.44	4.03	0.46
2	4573	12.68	4.88	0.49
3	4777	14.73	5.65	0.52
5	5180	19.12	7.31	0.59
10	6188	30.20	11.51	0.75
41	12418	99.12	37.64	1.77

Cost of Commit Transaction

This is using ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	531	11.37	4.44	0.30
2	724	15.04	6.07	0.35
3	909	18.85	7.75	0.40
5	1284	26.90	11.27	0.51
10	2219	49.55	20.97	0.80
19	3905	99.43	41.75	1.43

Cost of CollectCom Transaction

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	56	479	21.07	8.25	0.40
2	113	590	32.26	12.75	0.53
3	169	700	45.80	18.23	0.68
4	227	810	63.83	25.46	0.89
5	284	920	79.22	31.84	1.06
6	341	1031	98.80	39.87	1.28

Cost of Close Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	541	16.68	7.67	0.36
2	717	18.40	9.28	0.40
3	922	20.13	10.92	0.43
5	1270	23.27	13.86	0.49
10	2120	31.88	21.80	0.66
50	8820	98.93	83.58	1.94

Cost of Contest Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	565	20.18	8.94	0.40
2	767	22.26	10.69	0.44
3	844	23.34	11.69	0.46
5	1231	27.13	15.04	0.53
10	2136	37.58	23.85	0.72
43	7812	99.71	77.33	1.86

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	4222	15.19	6.26	0.50
2	4479	32.06	13.96	0.71
3	4630	47.87	20.98	0.89
4	4808	66.25	29.16	1.11
5	4980	87.46	38.58	1.35

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	4205	8.26	3.46	0.43
5	1	57	4239	9.28	4.13	0.44
5	5	284	4374	14.40	7.27	0.51
5	10	568	4543	20.13	10.90	0.59
5	20	1138	4883	32.60	18.60	0.76
5	30	1707	5224	44.94	26.25	0.93
5	40	2275	5562	57.46	33.97	1.10
5	50	2847	5905	69.56	41.52	1.27
5	74	4213	6718	99.34	59.96	1.68

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 2024-01-16 08:17:08.036970728 UTC

Baseline Scenario

Number of nodes	3
Number of txs	9000
Avg. Confirmation Time (ms)	22.801748541
P99	105.79543636000074ms
P95	32.25203944999999ms
P50	19.85858ms
Number of Invalid txs	0

Baseline Scenario

Number of nodes	1
Number of txs	3000
Avg. Confirmation Time (ms)	3.643581640
P99	4.722123449999997ms
P95	4.1576464ms
P50	3.565492ms
Number of Invalid txs	0

[github-actions]

Test Results

405 tests  ±0   398 ✅ ±0   15m 35s ⏱️ +31s
135 suites ±0     7 💤 ±0 
  5 files   ±0     0 ❌ ±0 

Results for commit 8b3a54a. ± Comparison against base commit 4b39911.

♻️ This comment has been updated with latest results.

[ch1bo]

The context and decision are fine by me. See my suggestions for typos and link fixes, but also we could add the consequence as I suggested.