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	2023-05-11 11:24:04.696734606 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	e5cc20df4a2216e706b3d00b59fbb15a7cf12dbd28d271d4a8cf6d04	4336
νCommit	47c102d5f95a0648b4065f2b8bff59d3e34536a82ee7b0d42df73123	2124
νHead	9fe3a5c4d826f9475368e1e24c15bf22f4df19893cce2689d3c0564a	9492
μHead	7bec671467e923281c92e94257931913be106e217270a7b97076cb9b*	4148

• 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	4739	14.22	5.60	0.51
2	4951	14.40	5.58	0.52
3	5151	17.97	6.97	0.57
5	5566	23.94	9.27	0.66
10	6586	35.00	13.41	0.82
37	12121	97.51	36.93	1.74

Cost of Commit Transaction

Currently only one UTxO per commit allowed (this is about to change soon)

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	600	15.29	5.93	0.34

Cost of CollectCom Transaction

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	56	816	27.55	10.73	0.49
2	114	1140	43.33	17.02	0.67
3	171	1462	60.94	24.11	0.88
4	225	1790	81.70	32.47	1.12

Cost of Close Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	673	19.33	8.77	0.40
2	812	20.28	9.68	0.42
3	770	18.75	7.91	0.39
5	1307	24.16	13.33	0.50
10	2124	31.13	19.62	0.64
50	8725	87.17	69.99	1.74

Cost of Contest Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	684	24.35	10.47	0.45
2	841	26.49	12.01	0.49
3	997	27.78	13.21	0.51
5	1336	31.63	16.12	0.58
10	2160	39.77	22.80	0.73
45	7928	99.74	70.74	1.81

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	4930	23.17	9.81	0.63
2	5180	36.24	15.44	0.78
3	5503	53.13	22.83	0.99
4	5826	72.67	31.39	1.22
5	6148	95.10	41.21	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	4765	8.67	3.57	0.46
5	1	58	4799	10.06	4.39	0.47
5	5	284	4943	15.64	7.69	0.55
5	10	570	5126	22.61	11.82	0.64
5	20	1140	5485	36.57	20.08	0.83
5	30	1708	5844	50.53	28.34	1.02
5	40	2277	6199	64.49	36.60	1.21
5	50	2849	6565	78.46	44.87	1.40
5	65	3697	7094	99.42	57.28	1.68