proof: log more proof properties

This commit outputs additional properties of a decoded proof.
This is useful for debugging the content of a "new_proof_blob" of an
asset transfer. All one has to do is copy/paste the hex string into the
proof/testdata/proof.hex file and run the TestProofVerification to get a
human-readable version.

Author: guggero

proof/proof_test.go

@@ -945,6 +945,7 @@ func TestProofVerification(t *testing.T) {
 	assetID := p.Asset.ID()
 	t.Logf("Proof asset ID: %x", assetID[:])
 
+	t.Logf("Proof anchor TXID: %v", p.AnchorTx.TxHash())
 	t.Logf("Proof anchor TX: %v", spew.Sdump(p.AnchorTx))
 
 	inclusionTxOut := p.AnchorTx.TxOut[p.InclusionProof.OutputIndex]
@@ -966,6 +967,13 @@ func TestProofVerification(t *testing.T) {
 		t.Logf("%s proof key: %x", logString, proofKey)
 	}
 
+	for _, exclusionProof := range p.ExclusionProofs {
+		t.Logf("Exclusion proof output index: %d",
+			exclusionProof.OutputIndex)
+		t.Logf("Exclusion proof internal key: %x",
+			exclusionProof.InternalKey.SerializeCompressed())
+	}
+
 	var buf bytes.Buffer
 	require.NoError(t, p.Asset.Encode(&buf))
 	t.Logf("Proof asset encoded: %x", buf.Bytes())