Add ActivityPub representation for identity proofs (#10414)

* Add ActivityPub representation for identity proofs

* Add tests

spec/services/activitypub/process_account_service_spec.rb

@@ -28,4 +28,45 @@ RSpec.describe ActivityPub::ProcessAccountService, type: :service do
       expect(account.fields[1].value).to eq 'Unit test'
     end
   end
+
+  context 'identity proofs' do
+    let(:payload) do
+      {
+        id: 'https://foo.test',
+        type: 'Actor',
+        inbox: 'https://foo.test/inbox',
+        attachment: [
+          { type: 'IdentityProof', name: 'Alice', signatureAlgorithm: 'keybase', signatureValue: 'a' * 66 },
+        ],
+      }.with_indifferent_access
+    end
+
+    it 'parses out of attachment' do
+      account = subject.call('alice', 'example.com', payload)
+
+      expect(account.identity_proofs.count).to eq 1
+
+      proof = account.identity_proofs.first
+
+      expect(proof.provider).to eq 'keybase'
+      expect(proof.provider_username).to eq 'Alice'
+      expect(proof.token).to eq 'a' * 66
+    end
+
+    it 'removes no longer present proofs' do
+      account   = Fabricate(:account, username: 'alice', domain: 'example.com')
+      old_proof = Fabricate(:account_identity_proof, account: account, provider: 'keybase', provider_username: 'Bob', token: 'b' * 66)
+
+      subject.call('alice', 'example.com', payload)
+
+      expect(account.identity_proofs.count).to eq 1
+      expect(account.identity_proofs.find_by(id: old_proof.id)).to be_nil
+    end
+
+    it 'queues a validity check on the proof' do
+      allow(ProofProvider::Keybase::Worker).to receive(:perform_async)
+      account = subject.call('alice', 'example.com', payload)
+      expect(ProofProvider::Keybase::Worker).to have_received(:perform_async)
+    end
+  end
 end