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OP_EVAL implementation

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OP_EVAL is a new opcode that evaluates an item on the stack as a script.
It enables a new type of bitcoin address that needs an arbitrarily
complex script to redeem.
This commit is contained in:
Gavin Andresen
2011-10-03 13:05:43 -04:00
parent cc40ba2151
commit e679ec969c
15 changed files with 1165 additions and 582 deletions
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122
src/bitcoinrpc.cpp
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@@ -667,7 +667,7 @@ Value getreceivedbyaccount(const Array& params, bool fHelp)
if (params.size() > 1)
nMinDepth = params[1].get_int();
// Get the set of pub keys that have the label
// Get the set of pub keys assigned to account
string strAccount = AccountFromValue(params[0]);
set<CBitcoinAddress> setAddress;
GetAccountAddresses(strAccount, setAddress);
@@ -936,56 +936,30 @@ Value sendmany(const Array& params, bool fHelp)
return wtx.GetHash().GetHex();
}
Value sendmultisig(const Array& params, bool fHelp)
Value addmultisigaddress(const Array& params, bool fHelp)
{
if (fHelp || params.size() < 4 || params.size() > 7)
if (fHelp || params.size() < 2 || params.size() > 3)
{
string msg = "sendmultisig <fromaccount> <type> <[\"key\",\"key\"]> <amount> [minconf=1] [comment] [comment-to]\n"
"<type> is one of: \"and\", \"or\", \"escrow\"\n"
"<keys> is an array of strings (in JSON array format); each key is a bitcoin address, hex or base58 public key\n"
"<amount> is a real and is rounded to the nearest 0.00000001";
if (pwalletMain->IsCrypted())
msg += "\nrequires wallet passphrase to be set with walletpassphrase first";
string msg = "addmultisigaddress <nrequired> <'[\"key\",\"key\"]'> [account]\n"
"Add a nrequired-to-sign multisignature address to the wallet\"\n"
"each key is a bitcoin address, hex or base58 public key\n"
"If [account] is specified, assign address to [account].";
throw runtime_error(msg);
}
string strAccount = AccountFromValue(params[0]);
string strType = params[1].get_str();
const Array& keys = params[2].get_array();
int64 nAmount = AmountFromValue(params[3]);
int nMinDepth = 1;
if (params.size() > 4)
nMinDepth = params[4].get_int();
CWalletTx wtx;
wtx.strFromAccount = strAccount;
if (params.size() > 5 && params[5].type() != null_type && !params[5].get_str().empty())
wtx.mapValue["comment"] = params[5].get_str();
if (params.size() > 6 && params[6].type() != null_type && !params[6].get_str().empty())
wtx.mapValue["to"] = params[6].get_str();
if (pwalletMain->IsLocked())
throw JSONRPCError(-13, "Error: Please enter the wallet passphrase with walletpassphrase first.");
// Check funds
int64 nBalance = GetAccountBalance(strAccount, nMinDepth);
if (nAmount > nBalance)
throw JSONRPCError(-6, "Account has insufficient funds");
int nRequired = params[0].get_int();
const Array& keys = params[1].get_array();
string strAccount;
if (params.size() > 2)
strAccount = AccountFromValue(params[2]);
// Gather public keys
int nKeysNeeded = 0;
if (strType == "and" || strType == "or")
nKeysNeeded = 2;
else if (strType == "escrow")
nKeysNeeded = 3;
else
throw runtime_error("sendmultisig: <type> must be one of: and or and_or");
if (keys.size() != nKeysNeeded)
if (keys.size() < nRequired)
throw runtime_error(
strprintf("sendmultisig: wrong number of keys (got %d, need %d)", keys.size(), nKeysNeeded));
strprintf("addmultisigaddress: wrong number of keys (got %d, need at least %d)", keys.size(), nRequired));
std::vector<CKey> pubkeys;
pubkeys.resize(nKeysNeeded);
for (int i = 0; i < nKeysNeeded; i++)
pubkeys.resize(keys.size());
for (int i = 0; i < keys.size(); i++)
{
const std::string& ks = keys[i].get_str();
if (ks.size() == 130) // hex public key
@@ -1003,32 +977,23 @@ Value sendmultisig(const Array& params, bool fHelp)
CBitcoinAddress address(ks);
if (!pwalletMain->GetKey(address, pubkeys[i]))
throw runtime_error(
strprintf("sendmultisig: unknown address: %s",ks.c_str()));
strprintf("addmultisigaddress: unknown address: %s",ks.c_str()));
}
}
// Send
// Construct using OP_EVAL
CScript inner;
inner.SetMultisig(nRequired, pubkeys);
uint160 scriptHash = Hash160(inner);
CScript scriptPubKey;
if (strType == "and")
scriptPubKey.SetMultisigAnd(pubkeys);
else if (strType == "or")
scriptPubKey.SetMultisigOr(pubkeys);
else
scriptPubKey.SetMultisigEscrow(pubkeys);
scriptPubKey.SetEval(inner);
pwalletMain->AddCScript(scriptHash, inner);
CBitcoinAddress address;
address.SetScriptHash160(scriptHash);
CReserveKey keyChange(pwalletMain);
int64 nFeeRequired = 0;
bool fCreated = pwalletMain->CreateTransaction(scriptPubKey, nAmount, wtx, keyChange, nFeeRequired);
if (!fCreated)
{
if (nAmount + nFeeRequired > pwalletMain->GetBalance())
throw JSONRPCError(-6, "Insufficient funds");
throw JSONRPCError(-4, "Transaction creation failed");
}
if (!pwalletMain->CommitTransaction(wtx, keyChange))
throw JSONRPCError(-4, "Transaction commit failed");
return wtx.GetHash().GetHex();
pwalletMain->SetAddressBookName(address, strAccount);
return address.ToString();
}
@@ -1700,6 +1665,24 @@ Value validateaddress(const Array& params, bool fHelp)
std::string strPubKey(vchPubKey.begin(), vchPubKey.end());
ret.push_back(Pair("pubkey58", EncodeBase58(vchPubKey)));
}
else if (pwalletMain->HaveCScript(address.GetHash160()))
{
ret.push_back(Pair("isscript", true));
CScript subscript;
pwalletMain->GetCScript(address.GetHash160(), subscript);
ret.push_back(Pair("ismine", ::IsMine(*pwalletMain, subscript)));
std::vector<CBitcoinAddress> addresses;
txntype whichType;
int nRequired;
ExtractAddresses(subscript, pwalletMain, whichType, addresses, nRequired);
ret.push_back(Pair("script", GetTxnTypeName(whichType)));
Array a;
BOOST_FOREACH(const CBitcoinAddress& addr, addresses)
a.push_back(addr.ToString());
ret.push_back(Pair("addresses", a));
if (whichType == TX_MULTISIG)
ret.push_back(Pair("sigsrequired", nRequired));
}
else
ret.push_back(Pair("ismine", false));
if (pwalletMain->mapAddressBook.count(address))
@@ -1946,7 +1929,7 @@ pair<string, rpcfn_type> pCallTable[] =
make_pair("move", &movecmd),
make_pair("sendfrom", &sendfrom),
make_pair("sendmany", &sendmany),
make_pair("sendmultisig", &sendmultisig),
make_pair("addmultisigaddress", &addmultisigaddress),
make_pair("gettransaction", &gettransaction),
make_pair("listtransactions", &listtransactions),
make_pair("signmessage", &signmessage),
@@ -2590,16 +2573,15 @@ int CommandLineRPC(int argc, char *argv[])
params[1] = v.get_obj();
}
if (strMethod == "sendmany" && n > 2) ConvertTo<boost::int64_t>(params[2]);
if (strMethod == "sendmultisig" && n > 2)
if (strMethod == "addmultisigaddress" && n > 0) ConvertTo<boost::int64_t>(params[0]);
if (strMethod == "addmultisigaddress" && n > 1)
{
string s = params[2].get_str();
string s = params[1].get_str();
Value v;
if (!read_string(s, v) || v.type() != array_type)
throw runtime_error("sendmultisig: type mismatch "+s);
params[2] = v.get_array();
throw runtime_error("addmultisigaddress: type mismatch "+s);
params[1] = v.get_array();
}
if (strMethod == "sendmultisig" && n > 3) ConvertTo<double>(params[3]);
if (strMethod == "sendmultisig" && n > 4) ConvertTo<boost::int64_t>(params[4]);
// Execute
Object reply = CallRPC(strMethod, params);