Allow override of parachain pallet ID and authorize_upgrade call ID

README_src.adoc

@@ -45,5 +45,5 @@ If your project uses standard values (such as your runtime package being named `
 == Sample workflows
 
 include::examples/index.adoc[leveloffset=+1]
-
+include::doc/parachain-overrides.adoc[]
 include::doc/dev-notes.adoc[]

action.yml

@@ -117,6 +117,11 @@ runs:
 
         echo "BUILD_OPTS=${{ env.BUILD_OPTS }}" >> $GITHUB_ENV
 
+        PARACHAIN_PALLET_ID=${${{ env.PARACHAIN_PALLET_ID }}:-0x01}
+        AUTHORIZE_UPGRADE_PREFIX=${${{ env.AUTHORIZE_UPGRADE_PREFIX }}:-0x03}
+        echo "PARACHAIN_PALLET_ID=$PARACHAIN_PALLET_ID" >> $GITHUB_ENV
+        echo "AUTHORIZE_UPGRADE_PREFIX=$AUTHORIZE_UPGRADE_PREFIX" >> $GITHUB_ENV
+
         echo ::endgroup
 
     - id: env_check
@@ -132,6 +137,8 @@ runs:
         echo ℹ️ workdir: ${{ env.WORKDIR }}
         echo ℹ️ runtime_dir: ${{ env.RUNTIME_DIR }}
         echo ℹ️ build_opts: ${{ env.BUILD_OPTS }}
+        echo ℹ️ parachain_pallet_id: ${{ env.PARACHAIN_PALLET_ID }}
+        echo ℹ️ authorize_upgrade_prefix: ${{ env.AUTHORIZE_UPGRADE_PREFIX }}
         echo ℹ️ .git folder: `ls -ald ${{ env.WORKDIR }}/.git`
         echo ℹ️ Cargo.toml: `ls -al ${{ env.WORKDIR }}/Cargo.toml`
 
@@ -170,7 +177,7 @@ runs:
       shell: bash
       run: |
         echo ::group::Srtool build of chain ${{ inputs.chain }}
-        CMD="docker run -i --rm -e PACKAGE=${{ env.PACKAGE }} -e RUNTIME_DIR=${{ env.RUNTIME_DIR }} -e BUILD_OPTS -v ${{ env.WORKDIR }}:/build ${{ env.SRTOOL_IMAGE }} build --app --json -cM"
+        CMD="docker run -i --rm -e PACKAGE=${{ env.PACKAGE }} -e RUNTIME_DIR=${{ env.RUNTIME_DIR }} -e BUILD_OPTS -e PARACHAIN_PALLET_ID -e AUTHORIZE_UPGRADE_PREFIX -v ${{ env.WORKDIR }}:/build ${{ env.SRTOOL_IMAGE }} build --app --json -cM"
         echo ::debug::build::docker_run $CMD
 
         # here we keep streaming the progress and fetch the last line for the json result

doc/parachain-overrides.adoc

@@ -0,0 +1,6 @@
+
+Similar to https://github.com/chevdor/subwasm[subwasm], the parachain pallet ID and the `authorize_upgrade` call ID can be overriden by `PARACHAIN_PALLET_ID` and `AUTHORIZE_UPGRADE_PREFIX` environmental variables, respectively. It will affect the generated proposal hash `parachain_authorize_upgrade_hash`.
+
+If unset, the two envs will have the following default values:
+- `PARACHAIN_PALLET_ID`:      `0x01`
+- `AUTHORIZE_UPGRADE_PREFIX`: `0x03`

examples/06_parachain_overrides.yml

@@ -0,0 +1,28 @@
+name: Srtool build
+
+on: push
+
+jobs:
+  srtool:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        chain: ["statemine", "westmint"]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Srtool build
+        id: srtool_build
+        uses: chevdor/srtool-actions@v0.4.0
+        env:
+          # optional: will override the parachain pallet ID and authorize_upgrade call ID,
+          #           which will result in a different parachain_authorize_upgrade_hash
+          PARACHAIN_PALLET_ID: 0x1e
+          AUTHORIZE_UPGRADE_PREFIX: 0x02
+        with:
+          chain: ${{ matrix.chain }}
+          runtime_dir: polkadot-parachains/${{ matrix.chain }}-runtime
+      - name: Summary
+        run: |
+          echo '${{ steps.srtool_build.outputs.json }}' | jq . > ${{ matrix.chain }}-srtool-digest.json
+          cat ${{ matrix.chain }}-srtool-digest.json
+          echo "Runtime location: ${{ steps.srtool_build.outputs.wasm }}"

examples/index.adoc

@@ -32,3 +32,9 @@ include::03_artifacts.yml[]
 ----
 include::05_build_opts.yml[]
 ----
+
+== Environmental variables and parachain overrides
+[source,yaml]
+----
+include::06_parachain_overrides.yml[]
+----