Change default terse list count from 2^15 to 2^6.

- Also increase max list size to 2^26.

CHANGELOG.md

@@ -1,5 +1,19 @@
 # bedrock-vc-issuer ChangeLog
 
+## 29.0.0 - 2025-mm-dd
+
+### Changed
+- **BREAKING**: Update default terse list count to match spec; it is now
+  64 (2^6) instead of 32768 (2^15). See the `TerseBitstringStatusList` spec
+  for more details on the list count choice. Existing deployments that do not
+  use `TerseBitstringStatusList` can be safely updated to this version.
+  Existing deployments that do use it but where an upgrade is desirable, should
+  stop using existing instances that use `TerseBitstringStatusList`, upgrade
+  and then create new instances that use `TerseBitstringStatusList` to reenable
+  existing use. Other upgrade paths and behavior are undefined.
+- Increase `MAX_LIST_SIZE` to accommodate lists of up to size `2^26`, which is
+  how large terse bitstring status lists are by default.
+
 ## 28.4.0 - 2024-12-17
 
 ### Added

lib/constants.js

@@ -1,18 +1,24 @@
 /*!
- * Copyright (c) 2024 Digital Bazaar, Inc. All rights reserved.
+ * Copyright (c) 2024-2025 Digital Bazaar, Inc. All rights reserved.
  */
 export const DEFAULT_BLOCK_COUNT = 4096;
 export const DEFAULT_BLOCK_SIZE = 32;
 
 // default `TerseBitstringStatusList` list count is 32-bit integer size
-// divided by default list size = 2^32/2^17 = 2^15 = 32768
-export const DEFAULT_TERSE_LIST_COUNT = 32768;
+// divided by default list size = 2^32/2^26 = 2^6 = 64; each list
+export const DEFAULT_TERSE_LIST_COUNT = 64;
 
 // maximum number of cryptosuites to be used in a proof set
 export const MAX_CRYPTOSUITE_OPTIONS = 10;
 
-// max list size is DEFAULT_BLOCK_COUNT * DEFAULT_BLOCK_SIZE = 131072
-export const MAX_LIST_SIZE = DEFAULT_BLOCK_COUNT * DEFAULT_BLOCK_SIZE;
+// default list size is DEFAULT_BLOCK_COUNT * DEFAULT_BLOCK_SIZE = 131072
+export const DEFAULT_LIST_SIZE = DEFAULT_BLOCK_COUNT * DEFAULT_BLOCK_SIZE;
+
+// max list size is 2^26, which is the largest size a totally random,
+// unencrypted list can be (8MiB) without breaking the max 10MiB storage
+// barrier for a single VC -- leaving 2MiB of space for other information
+// beyond the list in a status list credential
+export const MAX_LIST_SIZE = 67108864;
 
 // maximum number of lists this software can keep track of (applies only to
 // status list configurations where the number of lists is limited)