Merge pull request #268 from SiaFoundation/nate/validate-v2-transacti…

…on-policies

Fix panic when validating v2 transactions

.changeset/fixed_a_panic_when_unmarshalling_unknown_spend_policy_types.md

@@ -0,0 +1,7 @@
+---
+default: major
+---
+
+# Fixed a panic when unmarshalling unknown spend policy types
+
+An error will now be returned when trying to encode a transaction with an unset `SpendPolicy`

types/policy.go

@@ -496,6 +496,8 @@ func (p *SpendPolicy) UnmarshalJSON(b []byte) (err error) {
 		var pt PolicyTypeUnlockConditions
 		err = json.Unmarshal(v.Policy, (*UnlockConditions)(&pt))
 		p.Type = pt
+	default:
+		err = fmt.Errorf("unknown policy type %q", v.Type)
 	}
 	return
 }

types/types_test.go

@@ -808,6 +808,9 @@ func TestV2TransactionJSONMarshalling(t *testing.T) {
 						LeafIndex: frand.Uint64n(math.MaxUint64),
 					},
 				},
+				SatisfiedPolicy: SatisfiedPolicy{
+					Policy: AnyoneCanSpend(),
+				},
 			},
 		},
 	}