diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a66756..c00126c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,6 +17,7 @@ on:
           - testnet
           - mainnet
           - nexus-testnet-v2-0-rc-1
+          - nexus-testnet-v2-0-rc-4
   pull_request:
     types: [opened, synchronize, reopened]
   push:
@@ -25,10 +26,12 @@ on:
       - 'iterate/testnet/**'
       - 'iterate/mainnet/**'
       - 'iterate/nexus-testnet-v2-0-rc-1/**'
+      - 'iterate/nexus-testnet-v2-0-rc-4/**'
     # Tag-driven deploy. The tag prefix selects the env:
     #   testnet-*                    →  full pipeline against testnet
     #   mainnet-*                    →  full pipeline against mainnet
-    #   nexus-testnet-v2-0-rc-1-*    →  full pipeline against the v2 RC env
+    #   nexus-testnet-v2-0-rc-1-*    →  full pipeline against the v2 rc.1 RC env
+    #   nexus-testnet-v2-0-rc-4-*    →  full pipeline against the v2 rc.4 RC env
     # Tags are immutable per the convention, so each release-style
     # promotion lands on a specific commit and the deploy run is
     # attributable to that exact ref. No merge-strategy gotchas, no
@@ -38,6 +41,7 @@ on:
       - 'testnet-*'
       - 'mainnet-*'
       - 'nexus-testnet-v2-0-rc-1-*'
+      - 'nexus-testnet-v2-0-rc-4-*'
 
 permissions:
   contents: write
@@ -56,6 +60,7 @@ concurrency:
   group: >-
     ${{
       (startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-1-') || startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-1/')) && 'chain-nexus-testnet-v2-0-rc-1' ||
+      (startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-4-') || startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-4/')) && 'chain-nexus-testnet-v2-0-rc-4' ||
       (startsWith(github.ref_name, 'mainnet-') || startsWith(github.ref_name, 'iterate/mainnet/')) && 'chain-mainnet' ||
       (startsWith(github.ref_name, 'testnet-') || startsWith(github.ref_name, 'iterate/testnet/')) && 'chain-testnet' ||
       (github.event_name == 'workflow_dispatch' && inputs.target-env != '') && format('chain-{0}', inputs.target-env) ||
@@ -117,9 +122,11 @@ jobs:
           needs.resolve-target.outputs.base-ref ||
           inputs.target-env ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-1-') && 'nexus-testnet-v2-0-rc-1') ||
+          (github.ref_type == 'tag' && startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-4-') && 'nexus-testnet-v2-0-rc-4') ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'mainnet-') && 'mainnet') ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'testnet-') && 'testnet') ||
           (startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-1/') && 'nexus-testnet-v2-0-rc-1') ||
+          (startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-4/') && 'nexus-testnet-v2-0-rc-4') ||
           (startsWith(github.ref_name, 'iterate/mainnet/') && 'mainnet') ||
           (startsWith(github.ref_name, 'iterate/testnet/') && 'testnet') ||
           (github.event_name == 'pull_request' && github.base_ref) ||
@@ -147,12 +154,14 @@ jobs:
        (github.event_name == 'push' && github.ref_type == 'branch' && (
          startsWith(github.ref_name, 'iterate/testnet/') ||
          startsWith(github.ref_name, 'iterate/mainnet/') ||
-         startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-1/')
+         startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-1/') ||
+         startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-4/')
        )) ||
        (github.event_name == 'push' && github.ref_type == 'tag' && (
          startsWith(github.ref_name, 'testnet-') ||
          startsWith(github.ref_name, 'mainnet-') ||
-         startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-1-')
+         startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-1-') ||
+         startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-4-')
        )))
     uses: ./.github/workflows/offchain-tools.prepare.yml
     with:
@@ -161,9 +170,11 @@ jobs:
           needs.resolve-target.outputs.base-ref ||
           inputs.target-env ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-1-') && 'nexus-testnet-v2-0-rc-1') ||
+          (github.ref_type == 'tag' && startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-4-') && 'nexus-testnet-v2-0-rc-4') ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'mainnet-') && 'mainnet') ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'testnet-') && 'testnet') ||
           (startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-1/') && 'nexus-testnet-v2-0-rc-1') ||
+          (startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-4/') && 'nexus-testnet-v2-0-rc-4') ||
           (startsWith(github.ref_name, 'iterate/mainnet/') && 'mainnet') ||
           (startsWith(github.ref_name, 'iterate/testnet/') && 'testnet') ||
           (github.event_name == 'pull_request' && github.base_ref) ||
@@ -183,9 +194,11 @@ jobs:
           needs.resolve-target.outputs.base-ref ||
           inputs.target-env ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-1-') && 'nexus-testnet-v2-0-rc-1') ||
+          (github.ref_type == 'tag' && startsWith(github.ref_name, 'nexus-testnet-v2-0-rc-4-') && 'nexus-testnet-v2-0-rc-4') ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'mainnet-') && 'mainnet') ||
           (github.ref_type == 'tag' && startsWith(github.ref_name, 'testnet-') && 'testnet') ||
           (startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-1/') && 'nexus-testnet-v2-0-rc-1') ||
+          (startsWith(github.ref_name, 'iterate/nexus-testnet-v2-0-rc-4/') && 'nexus-testnet-v2-0-rc-4') ||
           (startsWith(github.ref_name, 'iterate/mainnet/') && 'mainnet') ||
           (startsWith(github.ref_name, 'iterate/testnet/') && 'testnet') ||
           (github.event_name == 'pull_request' && github.base_ref) ||
diff --git a/.github/workflows/offchain-tools.deploy.yml b/.github/workflows/offchain-tools.deploy.yml
index 943b7e2..145b2e4 100644
--- a/.github/workflows/offchain-tools.deploy.yml
+++ b/.github/workflows/offchain-tools.deploy.yml
@@ -27,6 +27,7 @@ jobs:
       ${{
         (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'mainnet' && 'mainnet' ||
         (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-1' && 'nexus-testnet-v2-0-rc-1' ||
+        (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-4' && 'nexus-testnet-v2-0-rc-4' ||
         'testnet'
       }}
     strategy:
diff --git a/.github/workflows/offchain-tools.prepare.yml b/.github/workflows/offchain-tools.prepare.yml
index 7bc63e2..9d7f941 100644
--- a/.github/workflows/offchain-tools.prepare.yml
+++ b/.github/workflows/offchain-tools.prepare.yml
@@ -23,6 +23,7 @@ jobs:
       ${{
         (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'mainnet' && 'mainnet' ||
         (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-1' && 'nexus-testnet-v2-0-rc-1' ||
+        (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-4' && 'nexus-testnet-v2-0-rc-4' ||
         'testnet'
       }}
     strategy:
@@ -218,6 +219,7 @@ jobs:
       ${{
         (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'mainnet' && 'mainnet' ||
         (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-1' && 'nexus-testnet-v2-0-rc-1' ||
+        (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-4' && 'nexus-testnet-v2-0-rc-4' ||
         'testnet'
       }}
     steps:
diff --git a/.github/workflows/offchain-tools.readiness.yml b/.github/workflows/offchain-tools.readiness.yml
index 7b93d5b..c493f2c 100644
--- a/.github/workflows/offchain-tools.readiness.yml
+++ b/.github/workflows/offchain-tools.readiness.yml
@@ -19,6 +19,7 @@ jobs:
       ${{
         (github.base_ref || github.ref_name) == 'mainnet' && 'mainnet' ||
         (github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-1' && 'nexus-testnet-v2-0-rc-1' ||
+        (github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-4' && 'nexus-testnet-v2-0-rc-4' ||
         'testnet'
       }}
     strategy:
diff --git a/.github/workflows/offchain-tools.register.yml b/.github/workflows/offchain-tools.register.yml
index c893b8c..e2e2421 100644
--- a/.github/workflows/offchain-tools.register.yml
+++ b/.github/workflows/offchain-tools.register.yml
@@ -19,6 +19,7 @@ jobs:
       ${{
         (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'mainnet' && 'mainnet' ||
         (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-1' && 'nexus-testnet-v2-0-rc-1' ||
+        (inputs.target-ref || github.event_name == 'pull_request' && github.base_ref || github.ref_name) == 'nexus-testnet-v2-0-rc-4' && 'nexus-testnet-v2-0-rc-4' ||
         'testnet'
       }}
     steps: