Add type error when attempting value transfer to a non-payable contract

2 files changed, 10 insertions, 0 deletions

diff --git a/libsolidity/ast/Types.cpp b/libsolidity/ast/Types.cpp
index 6ecf509d..b54407c6 100644
--- a/libsolidity/ast/Types.cpp
+++ b/libsolidity/ast/Types.cpp
@@ -1230,6 +1230,12 @@ bool ContractType::isExplicitlyConvertibleTo(Type const& _convertTo) const
 		_convertTo.category() == Category::Contract;
 }
 
+bool ContractType::isPayable() const
+{
+	auto fallbackFunction = m_contract.fallbackFunction();
+	return fallbackFunction && fallbackFunction->isPayable();
+}
+
 TypePointer ContractType::unaryOperatorResult(Token::Value _operator) const
 {
 	return _operator == Token::Delete ? make_shared<TupleType>() : TypePointer();
diff --git a/libsolidity/ast/Types.h b/libsolidity/ast/Types.h
index 66eb039f..bd5da30a 100644
--- a/libsolidity/ast/Types.h
+++ b/libsolidity/ast/Types.h
@@ -675,6 +675,10 @@ public:
 	}
 
 	bool isSuper() const { return m_super; }
+
+	// @returns true if and only if the contract has a payable fallback function
+	bool isPayable() const;
+
 	ContractDefinition const& contractDefinition() const { return m_contract; }
 
 	/// Returns the function type of the constructor modified to return an object of the contract's type.