From cdcbb2f16014077597e5901c0f328920c904409e Mon Sep 17 00:00:00 2001 From: Péter Szilágyi Date: Wed, 27 Apr 2016 16:29:13 +0300 Subject: accounts/abi/bind, eth: add contract non-existent error --- eth/api.go | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'eth') diff --git a/eth/api.go b/eth/api.go index a0b1f8ac2..02b34541f 100644 --- a/eth/api.go +++ b/eth/api.go @@ -51,6 +51,15 @@ import ( "golang.org/x/net/context" ) +// ErrNoCode is returned by call and transact operations for which the requested +// recipient contract to operate on does not exist in the state db or does not +// have any code associated with it (i.e. suicided). +// +// Please note, this error string is part of the RPC API and is expected by the +// native contract bindings to signal this particular error. Do not change this +// as it will break all dependent code! +var ErrNoCode = errors.New("no contract code at given address") + const defaultGas = uint64(90000) // blockByNumber is a commonly used helper function which retrieves and returns @@ -694,6 +703,12 @@ func (s *PublicBlockChainAPI) doCall(args CallArgs, blockNr rpc.BlockNumber) (st } stateDb = stateDb.Copy() + // If there's no code to interact with, respond with an appropriate error + if args.To != nil { + if code := stateDb.GetCode(*args.To); len(code) == 0 { + return "0x", nil, ErrNoCode + } + } // Retrieve the account state object to interact with var from *state.StateObject if args.From == (common.Address{}) { -- cgit