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path: root/accounts/abi/numbers.go
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* common: move big integer math to common/math (#3699)Felix Lange2017-02-271-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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
* accounts/abi: fix uint64 upper range encoding.Péter Szilágyi2016-06-101-9/+3
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* accounts/abi: Negative numbers not properly converted in ABI encodingThomas Bocek2016-06-061-38/+4
| | | | | | | | | | | | | | | When converting a negative number e.g., -2, the resulting ABI encoding should look as follows: fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe. However, since the check of the type is for an uint instead of an int, it results in the following ABI encoding: 0101010101010101010101010101010101010101010101010101010101010102. The Ethereum ABI (https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI) says, that signed integers are stored in two's complement which should be of the form ffffff.... and not 01010101..... for e.g. -1. Thus, I removed the type check in numbers.go as well as the function S256 as I don't think they are correct. Or maybe I'm missing something?
* accouns/abi: refactored ABI packageJeffrey Wilcke2016-04-201-2/+2
| | | | | | | | | | | | | | | | | Refactored the abi package parsing and type handling. Relying mostly on package reflect as opposed to most of our own type reflection. Our own type reflection is still used however for cases such as Bytes and FixedBytes (abi: bytes•). This also inclused several fixes for slice handling of arbitrary and fixed size for all supported types. This also further removes implicit type casting such as assigning, for example `[2]T{} = []T{1}` will fail, however `[2]T{} == []T{1, 2}` (notice assigning *slice* to fixed size *array*). Assigning arrays to slices will always succeed if they are of the same element type. Incidentally also fixes #2379
* abi: accept input slices of all supported typesJeffrey Wilcke2016-04-051-2/+0
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* accounts/abi: Fixed bytes input accept []byte and variable input supportJeffrey Wilcke2016-03-151-28/+30
| | | | | | | | | Fixed up `[]byte` slice support such that `function print(bytes input)` accepts `[]byte` as input and treats it as 1 element rather than a slice of multiple elements. Added support for variable length input parameters like `bytes` and `strings`.
* accounts/abi: added output parsing & added call mechanismJeffrey Wilcke2015-11-251-0/+2
| | | | Added calling mechanism and return value parsing
* all: fix license headers one more timeFelix Lange2015-07-241-1/+1
| | | | I forgot to update one instance of "go-ethereum" in commit 3f047be5a.
* all: update license headers to distiguish GPL/LGPLFelix Lange2015-07-231-4/+4
| | | | | All code outside of cmd/ is licensed as LGPL. The headers now reflect this by calling the whole work "the go-ethereum library".
* all: update license informationFelix Lange2015-07-071-0/+16
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* Moved ethutil => commonobscuren2015-03-161-5/+5
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* Implemented contract ABIobscuren2015-01-271-0/+106