Expose the hash on all varsig

.github/workflows/gotest.yml

@@ -1,27 +0,0 @@
-on: [push, pull_request]
-name: Go Test
-
-jobs:
-  unit:
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ "ubuntu" ]
-        go: [ "1.23.x", "1.24.x"]
-    env:
-      COVERAGES: ""
-    runs-on: ${{ matrix.os }}-latest
-    name: ${{ matrix.os}} (go ${{ matrix.go }})
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
-        with:
-          go-version: ${{ matrix.go }}
-      - name: Go information
-        run: |
-          go version
-          go env
-      - name: Run tests
-        run: go test -v ./...
-      - name: Check formatted
-        run: gofmt -l .

registry_test.go

@@ -61,6 +61,10 @@ func (v testVarsig) Discriminator() varsig.Discriminator {
 	return v.disc
 }
 
+func (v testVarsig) Hash() varsig.Hash {
+	return varsig.HashUnspecified
+}
+
 func (v testVarsig) PayloadEncoding() varsig.PayloadEncoding {
 	return v.payEnc
 }

varsig.go

@@ -32,6 +32,9 @@ type Varsig interface {
 	// Discriminator returns the algorithm used to produce the corresponding signature.
 	Discriminator() Discriminator
 
+	// Hash returns the hash used on the data before signature.
+	Hash() Hash
+
 	// PayloadEncoding returns the codec that was used to encode the signed data.
 	PayloadEncoding() PayloadEncoding