polars_evm 0.1.1

Utilities for working with EVM data in polars

Polars EVM

Utilities for working with EVM data in polars

Polars EVM adds the evm namespace to polars dataframes, lazyframes, series, and expressions. This namespace is registered to polars upon import.

Features

• binary ↔ hex conversions
• keccak
• abi encoding [TODO]
• rlp encoding [TODO]

Installation

pip install polars_evm

Usage

Just import polars_evm and the evm namespace will be registered to polars.

import polars as pl
import polars_evm

addresses = [
    b'\xda\xc1\x7f\x95\x8d.\xe5#\xa2 b\x06\x99E\x97\xc1=\x83\x1e\xc7',
    b'\xa0\xb8i\x91\xc6!\x8b6\xc1\xd1\x9dJ.\x9e\xb0\xce6\x06\xebH',
    b'_\x98\x80ZN\x8b\xe2U\xa3(\x80\xfd\xec\x7fg(\xc6V\x8b\xa0'
]

series = pl.Series('address', addresses)
df = pl.DataFrame(series)

print('hex series:', series.evm.binary_to_hex())
print('hex df:', df.evm.binary_to_hex())
print('hex expr:', df.select(pl.col('address').evm.binary_to_hex()))

output:

hex series: shape: (3,)
Series: 'address' [str]
[
        "0xdac17f958d2e…
        "0xa0b86991c621…
        "0x5f98805a4e8b…
]
hex df: shape: (3, 1)
┌───────────────────────────────────┐
│ address                           │
│ ---                               │
│ str                               │
╞═══════════════════════════════════╡
│ 0xdac17f958d2ee523a2206206994597… │
│ 0xa0b86991c6218b36c1d19d4a2e9eb0… │
│ 0x5f98805a4e8be255a32880fdec7f67… │
└───────────────────────────────────┘
hex expr: shape: (3, 1)
┌───────────────────────────────────┐
│ literal                           │
│ ---                               │
│ str                               │
╞═══════════════════════════════════╡
│ 0xdac17f958d2ee523a2206206994597… │
│ 0xa0b86991c6218b36c1d19d4a2e9eb0… │
│ 0x5f98805a4e8be255a32880fdec7f67… │
└───────────────────────────────────┘

List of namespace entries

# DataFrame namespace
df.evm.binary_to_hex(prefix=True, columns=None)
df.evm.hex_to_binary(prefix=True, columns=None)

# LazyFrame namespace
lf.evm.binary_to_hex(prefix=True, columns=None)
lf.evm.hex_to_binary(prefix=True, columns=None)

# Series namespace
series.evm.binary_to_hex(prefix=True)
series.evm.hex_to_binary(prefix=True)
series.evm.keccak(output='hex', text=False)

# Expression namespace
pl.Expr.evm.binary_to_hex(prefix=True)
pl.Expr.evm.hex_to_binary(prefix=True)
pl.Expr.evm.keccak(output='hex', text=False)

TODO

• use efficient rust implementations where possible
• abi encoding
• rlp encoding