Transaction 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	2025-07-27 04:48:30.740730649 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	c8a101a5c8ac4816b0dceb59ce31fc2258e387de828f02961d2f2045	2652
νCommit	61458bc2f297fff3cc5df6ac7ab57cefd87763b0b7bd722146a1035c	685
νHead	be6ebc744208c660bf0fdc1cfbb5157477cd305de5b1777e575cbb4c	14665
μHead	1f47a42d1d6edc32ccd834acb19d5db3b2a5232f0bd7eaa8908dc519*	5284
νDeposit	ae01dade3a9c346d5c93ae3ce339412b90a0b8f83f94ec6baa24e30c	1102

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

Init transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	5837	10.19	3.22	0.51
2	6038	12.41	3.92	0.54
3	6239	14.69	4.65	0.58
5	6641	19.08	6.04	0.64
10	7646	28.71	9.03	0.78
43	14286	98.58	30.79	1.80

Commit transaction costs

This uses ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	558	2.44	1.16	0.20
2	742	3.38	1.73	0.22
3	920	4.36	2.33	0.24
5	1277	6.41	3.60	0.28
10	2177	12.13	7.25	0.40
54	10057	98.61	68.52	1.88

CollectCom transaction costs

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	57	525	25.20	7.30	0.43
2	113	636	34.28	9.87	0.53
3	171	747	40.20	11.68	0.59
4	227	858	49.86	14.43	0.69
5	281	974	61.34	17.53	0.82
6	338	1081	68.19	19.56	0.89
7	394	1192	81.33	23.23	1.03
8	450	1303	97.26	27.35	1.19
9	505	1414	93.33	26.70	1.16

Cost of Increment Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	1809	24.16	8.03	0.48
2	1966	26.43	9.49	0.52
3	2170	28.84	11.00	0.56
5	2411	31.87	13.27	0.61
10	3029	38.44	18.62	0.73
39	7651	96.47	57.34	1.68

Cost of Decrement Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	624	22.57	7.32	0.41
2	753	24.01	8.38	0.44
3	896	25.17	9.33	0.46
5	1119	27.13	11.22	0.50
10	2074	40.46	18.29	0.70
39	6454	97.35	53.42	1.61

Close transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	655	29.04	9.25	0.48
2	839	31.43	10.76	0.52
3	980	30.65	11.18	0.52
5	1250	34.75	13.87	0.59
10	2026	43.72	20.13	0.74
38	6354	99.74	57.46	1.65

Contest transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	628	33.06	10.20	0.52
2	769	35.02	11.47	0.55
3	956	37.74	13.07	0.59
5	1393	44.22	16.77	0.69
10	2033	53.74	22.97	0.84
29	4984	97.46	49.72	1.52

Abort transaction costs

There is some variation due to the random mixture of initial and already committed outputs.

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	5697	22.93	7.56	0.64
2	5961	35.84	12.04	0.79
3	6204	45.56	15.39	0.90
4	6158	48.35	16.19	0.93
5	6340	60.67	20.35	1.07
6	6453	68.33	22.92	1.15
7	6630	79.89	26.86	1.28
8	6937	95.29	32.14	1.46
9	6949	97.36	32.72	1.48

FanOut transaction costs

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 ₳
10	0	0	5834	18.31	6.11	0.60
10	5	285	6005	29.80	10.58	0.73
10	10	570	6174	39.27	14.37	0.84
10	20	1137	6511	58.69	22.08	1.07
10	30	1708	6854	81.16	30.84	1.33
10	39	2219	7158	97.22	37.29	1.52