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	2025-07-28 04:51:34.286599255 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	10.85	3.45	0.52
2	6035	12.23	3.86	0.54
3	6236	14.69	4.65	0.58
5	6641	18.81	5.94	0.64
10	7644	29.12	9.18	0.79
43	14283	98.97	30.93	1.80

Commit transaction costs

This uses ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	561	2.44	1.16	0.20
2	742	3.38	1.73	0.22
3	923	4.36	2.33	0.24
5	1283	6.41	3.60	0.28
10	2173	12.13	7.25	0.40
54	10071	98.61	68.52	1.88

CollectCom transaction costs

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	57	525	24.43	7.12	0.42
2	114	640	34.20	9.84	0.53
3	170	747	40.09	11.66	0.59
4	226	858	51.02	14.66	0.71
5	282	969	63.27	18.06	0.83
6	339	1081	73.57	20.89	0.94
7	395	1192	82.49	23.34	1.04
8	451	1303	84.61	24.28	1.07
9	505	1414	94.06	27.11	1.17

Cost of Increment Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	1745	22.83	7.57	0.47
2	1886	24.28	8.70	0.49
3	2131	28.09	10.68	0.55
5	2468	33.11	13.72	0.63
10	3156	40.49	19.40	0.76
40	7740	99.63	58.81	1.72

Cost of Decrement Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	615	22.57	7.31	0.41
2	743	24.31	8.47	0.44
3	857	24.07	9.03	0.45
5	1292	31.16	12.36	0.55
10	2104	41.57	18.61	0.71
41	6677	98.82	55.20	1.64

Close transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	712	27.41	8.83	0.47
2	826	29.03	10.00	0.49
3	923	32.54	11.67	0.54
5	1255	36.65	14.39	0.61
10	2103	45.04	20.72	0.76
36	5996	96.78	55.03	1.59

Contest transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	692	33.69	10.50	0.53
2	817	35.77	11.79	0.56
3	1033	39.09	13.67	0.61
5	1282	42.39	15.92	0.66
10	1991	53.43	22.81	0.83
31	4940	98.82	50.84	1.53

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	5808	27.09	9.08	0.69
2	5920	34.84	11.65	0.78
3	6064	42.58	14.29	0.86
4	6190	54.06	18.13	0.99
5	6288	59.92	20.11	1.06
6	6654	76.69	25.91	1.25
7	6476	72.46	24.20	1.20
8	6736	85.04	28.57	1.34
9	6947	92.22	31.08	1.43

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	18.75	6.26	0.60
10	1	56	5867	20.78	7.06	0.63
10	5	285	6004	29.10	10.35	0.72
10	10	571	6175	39.08	14.30	0.84
10	20	1139	6514	60.39	22.67	1.09
10	37	2108	7094	94.89	36.28	1.49