accounts/abi/bind: constructor, auth utils and various backends

1 files changed, 46 insertions, 0 deletions

diff --git a/accounts/abi/bind/backends/nil.go b/accounts/abi/bind/backends/nil.go
new file mode 100644
index 000000000..8b1f9d63e
--- /dev/null
+++ b/accounts/abi/bind/backends/nil.go
@@ -0,0 +1,46 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package backends
+
+import (
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+// nilBackend implements bind.ContractBackend, but panics on any method call.
+// Its sole purpose is to support the binding tests to construct the generated
+// wrappers without calling any methods on them.
+type nilBackend struct{}
+
+func (*nilBackend) ContractCall(common.Address, []byte, bool) ([]byte, error) {
+	panic("not implemented")
+}
+func (*nilBackend) GasLimit(common.Address, *common.Address, *big.Int, []byte) (*big.Int, error) {
+	panic("not implemented")
+}
+func (*nilBackend) GasPrice() (*big.Int, error)                 { panic("not implemented") }
+func (*nilBackend) AccountNonce(common.Address) (uint64, error) { panic("not implemented") }
+func (*nilBackend) SendTransaction(*types.Transaction) error    { panic("not implemented") }
+
+// NewNilBackend creates a new binding backend that can be used for instantiation
+// but will panic on any invocation. Its sole purpose is to help testing.
+func NewNilBackend() bind.ContractBackend {
+	return new(nilBackend)
+}