From 5c8fe28b725bd9b128edceae3215132ea741641b Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Sun, 26 Feb 2017 22:21:51 +0100 Subject: common: move big integer math to common/math (#3699) * common: remove CurrencyToString Move denomination values to params instead. * common: delete dead code * common: move big integer operations to common/math This commit consolidates all big integer operations into common/math and adds tests and documentation. There should be no change in semantics for BigPow, BigMin, BigMax, S256, U256, Exp and their behaviour is now locked in by tests. The BigD, BytesToBig and Bytes2Big functions don't provide additional value, all uses are replaced by new(big.Int).SetBytes(). BigToBytes is now called PaddedBigBytes, its minimum output size parameter is now specified as the number of bytes instead of bits. The single use of this function is in the EVM's MSTORE instruction. Big and String2Big are replaced by ParseBig, which is slightly stricter. It previously accepted leading zeros for hexadecimal inputs but treated decimal inputs as octal if a leading zero digit was present. ParseUint64 is used in places where String2Big was used to decode a uint64. The new functions MustParseBig and MustParseUint64 are now used in many places where parsing errors were previously ignored. * common: delete unused big integer variables * accounts/abi: replace uses of BytesToBig with use of encoding/binary * common: remove BytesToBig * common: remove Bytes2Big * common: remove BigTrue * cmd/utils: add BigFlag and use it for error-checked integer flags While here, remove environment variable processing for DirectoryFlag because we don't use it. * core: add missing error checks in genesis block parser * common: remove String2Big * cmd/evm: use utils.BigFlag * common/math: check for 256 bit overflow in ParseBig This is supposed to prevent silent overflow/truncation of values in the genesis block JSON. Without this check, a genesis block that set a balance larger than 256 bits would lead to weird behaviour in the VM. * cmd/utils: fixup import --- internal/ethapi/api.go | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) (limited to 'internal') diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go index ca31c9f4b..8f4bde471 100644 --- a/internal/ethapi/api.go +++ b/internal/ethapi/api.go @@ -21,7 +21,6 @@ import ( "encoding/hex" "errors" "fmt" - "math" "math/big" "strings" "time" @@ -31,6 +30,7 @@ import ( "github.com/ethereum/go-ethereum/accounts/keystore" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/common/hexutil" + "github.com/ethereum/go-ethereum/common/math" "github.com/ethereum/go-ethereum/core" "github.com/ethereum/go-ethereum/core/types" "github.com/ethereum/go-ethereum/core/vm" @@ -38,6 +38,7 @@ import ( "github.com/ethereum/go-ethereum/ethdb" "github.com/ethereum/go-ethereum/log" "github.com/ethereum/go-ethereum/p2p" + "github.com/ethereum/go-ethereum/params" "github.com/ethereum/go-ethereum/rlp" "github.com/ethereum/go-ethereum/rpc" "github.com/syndtr/goleveldb/leveldb" @@ -45,9 +46,11 @@ import ( "golang.org/x/net/context" ) -const defaultGas = 90000 - -var emptyHex = "0x" +const ( + defaultGas = 90000 + defaultGasPrice = 50 * params.Shannon + emptyHex = "0x" +) // PublicEthereumAPI provides an API to access Ethereum related information. // It offers only methods that operate on public data that is freely available to anyone. @@ -597,7 +600,7 @@ func (s *PublicBlockChainAPI) doCall(ctx context.Context, args CallArgs, blockNr gas = big.NewInt(50000000) } if gasPrice.BitLen() == 0 { - gasPrice = new(big.Int).Mul(big.NewInt(50), common.Shannon) + gasPrice = new(big.Int).SetUint64(defaultGasPrice) } // Create new call message @@ -631,7 +634,7 @@ func (s *PublicBlockChainAPI) doCall(ctx context.Context, args CallArgs, blockNr // Setup the gas pool (also for unmetered requests) // and apply the message. - gp := new(core.GasPool).AddGas(common.MaxBig) + gp := new(core.GasPool).AddGas(math.MaxBig256) res, gas, err := core.ApplyMessage(evm, msg, gp) if err := vmError(); err != nil { return nil, common.Big0, err -- cgit v1.2.3