diff options
Diffstat (limited to 'accounts/abi/bind/backends/remote.go')
| -rw-r--r-- | accounts/abi/bind/backends/remote.go | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/accounts/abi/bind/backends/remote.go b/accounts/abi/bind/backends/remote.go deleted file mode 100644 index 58edd791a..000000000 --- a/accounts/abi/bind/backends/remote.go +++ /dev/null @@ -1,136 +0,0 @@ -// 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" - "github.com/ethereum/go-ethereum/rlp" - "github.com/ethereum/go-ethereum/rpc" - "golang.org/x/net/context" -) - -// This nil assignment ensures compile time that rpcBackend implements bind.ContractBackend. -var _ bind.ContractBackend = (*rpcBackend)(nil) - -// rpcBackend implements bind.ContractBackend, and acts as the data provider to -// Ethereum contracts bound to Go structs. It uses an RPC connection to delegate -// all its functionality. -type rpcBackend struct { - client *rpc.Client // RPC client connection to interact with an API server -} - -// NewRPCBackend creates a new binding backend to an RPC provider that can be -// used to interact with remote contracts. -func NewRPCBackend(client *rpc.Client) bind.ContractBackend { - return &rpcBackend{client: client} -} - -// HasCode implements ContractVerifier.HasCode by retrieving any code associated -// with the contract from the remote node, and checking its size. -func (b *rpcBackend) HasCode(ctx context.Context, contract common.Address, pending bool) (bool, error) { - block := "latest" - if pending { - block = "pending" - } - var hex string - err := b.client.CallContext(ctx, &hex, "eth_getCode", contract, block) - if err != nil { - return false, err - } - return len(common.FromHex(hex)) > 0, nil -} - -// ContractCall implements ContractCaller.ContractCall, delegating the execution of -// a contract call to the remote node, returning the reply to for local processing. -func (b *rpcBackend) ContractCall(ctx context.Context, contract common.Address, data []byte, pending bool) ([]byte, error) { - args := struct { - To common.Address `json:"to"` - Data string `json:"data"` - }{ - To: contract, - Data: common.ToHex(data), - } - block := "latest" - if pending { - block = "pending" - } - var hex string - err := b.client.CallContext(ctx, &hex, "eth_call", args, block) - if err != nil { - return nil, err - } - return common.FromHex(hex), nil - -} - -// PendingAccountNonce implements ContractTransactor.PendingAccountNonce, delegating -// the current account nonce retrieval to the remote node. -func (b *rpcBackend) PendingAccountNonce(ctx context.Context, account common.Address) (uint64, error) { - var hex rpc.HexNumber - err := b.client.CallContext(ctx, &hex, "eth_getTransactionCount", account.Hex(), "pending") - if err != nil { - return 0, err - } - return hex.Uint64(), nil -} - -// SuggestGasPrice implements ContractTransactor.SuggestGasPrice, delegating the -// gas price oracle request to the remote node. -func (b *rpcBackend) SuggestGasPrice(ctx context.Context) (*big.Int, error) { - var hex rpc.HexNumber - if err := b.client.CallContext(ctx, &hex, "eth_gasPrice"); err != nil { - return nil, err - } - return (*big.Int)(&hex), nil -} - -// EstimateGasLimit implements ContractTransactor.EstimateGasLimit, delegating -// the gas estimation to the remote node. -func (b *rpcBackend) EstimateGasLimit(ctx context.Context, sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error) { - args := struct { - From common.Address `json:"from"` - To *common.Address `json:"to"` - Value *rpc.HexNumber `json:"value"` - Data string `json:"data"` - }{ - From: sender, - To: contract, - Data: common.ToHex(data), - Value: rpc.NewHexNumber(value), - } - // Execute the RPC call and retrieve the response - var hex rpc.HexNumber - err := b.client.CallContext(ctx, &hex, "eth_estimateGas", args) - if err != nil { - return nil, err - } - return (*big.Int)(&hex), nil -} - -// SendTransaction implements ContractTransactor.SendTransaction, delegating the -// raw transaction injection to the remote node. -func (b *rpcBackend) SendTransaction(ctx context.Context, tx *types.Transaction) error { - data, err := rlp.EncodeToBytes(tx) - if err != nil { - return err - } - return b.client.CallContext(ctx, nil, "eth_sendRawTransaction", common.ToHex(data)) -} |