BigMax returns the larger of x or y.

BigMin returns the smaller of x or y.

BigPow returns a ** b as a big integer.

Byte returns the byte at position n, with the supplied padlength in Little-Endian encoding.

Exp implements exponentiation by squaring.

FirstBitSet returns the index of the first 1 bit in v, counting from LSB.

MustParseBig parses s as a 256 bit big integer and panics if the string is invalid.

PaddedBigBytes encodes a big integer as a big-endian byte slice.

ParseBig256 parses s as a 256 bit integer in decimal or hexadecimal syntax.

ReadBits encodes the absolute value of bigint as big-endian bytes.

S256 interprets x as a two's complement number.

U256 encodes as a 256 bit two's complement number.

HexOrDecimal256 marshals big.Int as hex or decimal.