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	2025-07-05 04:31:05.852694297 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	10.14	3.20	0.51
2	6038	12.62	4.00	0.55
3	6238	14.68	4.64	0.58
5	6640	18.88	5.97	0.64
10	7646	29.09	9.17	0.79
43	14281	98.61	30.81	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	740	3.38	1.73	0.22
3	923	4.36	2.33	0.24
5	1277	6.41	3.60	0.28
10	2173	12.13	7.25	0.40
54	10072	98.61	68.52	1.88

CollectCom transaction costs

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	57	525	25.24	7.32	0.43
2	112	639	33.26	9.63	0.52
3	170	751	40.20	11.68	0.59
4	228	858	53.89	15.35	0.73
5	282	969	58.51	16.92	0.79
6	338	1081	73.72	20.89	0.94
7	396	1192	80.77	23.01	1.02
8	449	1303	90.85	25.98	1.13

Cost of Increment Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	1819	24.24	8.05	0.48
2	1886	24.69	8.80	0.50
3	2120	27.73	10.59	0.54
5	2386	30.70	12.87	0.60
10	3165	40.38	19.38	0.76
42	7835	98.99	59.79	1.73

Cost of Decrement Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	607	22.77	7.34	0.41
2	768	23.97	8.35	0.44
3	891	25.02	9.28	0.46
5	1203	29.62	11.93	0.53
10	1972	38.65	17.75	0.68
42	6427	94.95	54.72	1.59

Close transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	652	29.03	9.25	0.48
2	851	31.42	10.77	0.52
3	914	32.54	11.67	0.54
5	1276	34.87	13.90	0.59
10	2033	46.90	21.10	0.77
37	5981	96.23	55.25	1.59

Contest transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	681	33.73	10.51	0.53
2	882	36.36	12.08	0.57
3	957	37.78	13.08	0.59
5	1353	43.10	16.24	0.68
10	2157	55.60	23.78	0.87
30	5057	99.66	50.85	1.54

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	5783	27.01	9.04	0.69
2	5936	36.80	12.36	0.80
3	5994	41.25	13.77	0.85
4	6183	51.00	17.09	0.96
5	6284	63.08	21.10	1.09
6	6410	71.93	24.13	1.19
7	6530	78.09	26.14	1.26
8	6758	90.01	30.29	1.39

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	5835	18.31	6.11	0.60
10	1	57	5868	21.67	7.37	0.64
10	10	570	6175	39.08	14.30	0.84
10	20	1139	6513	60.90	22.84	1.09
10	30	1707	6853	80.09	30.47	1.32
10	39	2219	7158	98.11	37.59	1.53