Update changelog and set maximumNumberOfParties to 9

cardano-scaling · Oct 4, 2024 · 27b506b · 27b506b
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -23,9 +23,10 @@ changes.
 
 - Tested with `cardano-node 9.2.0` and `cardano-cli 9.4.1.0`.
 
-- Write the vCommit validator in Aiken.
-  This makes the Abort and CollectCom transactions fit double the participants.
-  But, due to execution memory limits, the maximum number of parties increased to 7.
+- **BREAKING** Rewrite of the commit script in aiken:
+  - This makes `abort` and `collectCom` transactions more efficient and results
+    in a new maximum number of head participants being `9`.
+  - Changes script hashes in `hydra-plutus`
 
 ## [0.19.0] - 2024-09-13
 

diff --git a/hydra-node/src/Hydra/Chain.hs b/hydra-node/src/Hydra/Chain.hs
@@ -46,7 +46,7 @@ maxMainnetLovelace = Coin 100_000_000
 -- The value is obtained from calculating the costs of running the scripts
 -- and on-chan validators (see 'computeCollectComCost' 'computeAbortCost')
 maximumNumberOfParties :: Int
-maximumNumberOfParties = 7
+maximumNumberOfParties = 9
 
 -- | Data type used to post transactions on chain. It holds everything to
 -- construct corresponding Head protocol transactions.