Filled CHANGELOG and migration guide to reflect changes in SSE

CHANGELOG.md

@@ -42,6 +42,7 @@ This release candidate is compatible with [#node RC2](https://github.com/casper-
   - UniqAddress
   - DeployHeader
   - Deploy
+- variants `TransactionProcessed`, `TransactionExpired` and `TransactionAccepted` of enum `EventName` in `EventStream.ts`
 
 ### Changed
 
@@ -64,6 +65,7 @@ This release candidate is compatible with [#node RC2](https://github.com/casper-
 - `BalanceServiceByJsonRPC` class
 - `execution_results` field in `GetDeployResult` was removed. This affects `CasperServiceByJsonRPC.getDeployInfo` method return types.
 - field `block` of `GetBlockResult`. This change affects `CasperServiceByJsonRPC.getBlockInfo` method return type
+- variants `DeployProcessed` and `DeployAccepted` of enum `EventName` in `EventStream.ts`
 
 ## [2.15.5] - 2024-04-18
 

resources/migration-guide_v2-v3.md

@@ -154,10 +154,10 @@ This method is used to send a `Transaction` for execution. A `Transaction` is a
 
 This service was removed from 3.0.0 release. It has only one method - `getAccountBalance`. Please use `CasperServiceByJsonRPC.getAccountBalance` instead.
 
-## Speculative endpoints
+## EventName
 
-#TODO
+Enum `EventName` lost two values: `DeployProcessed` and `DeployAccepted`. `TransactionAccepted`, `TransactionProcessed` and `TransactionExpired` were added. Deploys stopped being a first-entity in favor of Transactions, so they all Deploys will be, in the SSE streams, communicated as `Transaction*` events. Please bear in mind that the internal structure of the events did change significantly.
 
-```
+## Speculative endpoints
 
-```
+Speculative endpoints are currently not supported by the JS SDK