https://github.com/manifoldfinance/qabiencode
KDB+ library for abi encoding ethereum functions
https://github.com/manifoldfinance/qabiencode
blockchain ethereum kdb kdb-library keccak q
Last synced: 4 months ago
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KDB+ library for abi encoding ethereum functions
- Host: GitHub
- URL: https://github.com/manifoldfinance/qabiencode
- Owner: manifoldfinance
- License: mit
- Created: 2021-08-13T15:06:53.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2021-09-30T10:09:06.000Z (about 4 years ago)
- Last Synced: 2025-06-18T02:48:58.824Z (4 months ago)
- Topics: blockchain, ethereum, kdb, kdb-library, keccak, q
- Language: C
- Homepage:
- Size: 17.6 KB
- Stars: 5
- Watchers: 2
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# qAbiEncode
KDB+ library for abi encoding ethereum functions. Specifications at:
https://docs.soliditylang.org/en/v0.5.3/abi-spec.html
Supports encoding of static and dynamic types. Fixed types have not been included as they are not currently used in our application.
## Install
Download repo contents and compile C library e.g.
```shell
$ git clone https://github.com/manifoldfinance/qAbiEncode.git
$ cd qAbiEncode
$ make
```
## Usage
Call .abi.encode, passing function signature and values i.e.
```q
q)\l abi.q
q).abi.encode["sam(bytes,bool,uint256[])";("dave";1b;(1 2 3))]
0xa5643bf20000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000464617665000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000003
```
Compare results with,
https://docs.soliditylang.org/en/v0.5.3/abi-spec.html
or
https://abi.hashex.org/
## qKeccak256
Ethereum Keccak C library for kdb+ integration. Ethereum sha3 differs from modern sha3 in the padding constant;
padding (keccak) = 0x01
padding (sha3) = 0x06
Modified from the original sha3 library at:
https://github.com/mjosaarinen/tiny_sha3
by Dr. Markku-Juhani O. Saarinen
based on Keccak algo:
https://keccak.team/keccak_specs_summary.html
### Keccak Usage
```q
q)sha3: `qKeccak 2:(`qKeccak256;2)
q)sha3["sam(bytes,bool,uint256[])";count "sam(bytes,bool,uint256[])"]
0xa5643bf27e2786816613d3eeb0b62650200b5a98766dfcfd4428f296fb56d043
```