pad
Pads a hex value or byte array with leading or trailing zeros.
Install
ts
import { pad } from 'viem'
Usage
By default, pad will pad a value with leading zeros up to 32 bytes (64 hex chars).
ts
import { pad } from 'viem'
pad('0xa4e12a45')
// 0x00000000000000000000000000000000000000000000000000000000a4e12a45
pad(new Uint8Array([1, 122, 51, 123]))
// Uint8Array [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,122,51,123]
Returns
Hex | ByteArray
The value with padded zeros.
Parameters
dir
- Type:
"left" | "right" - Default:
"left"
The direction in which to pad the zeros – either leading (left), or trailing (right).
ts
pad('0xa4e12a45', {
dir: 'right'
})
// 0xa4e12a4500000000000000000000000000000000000000000000000000000000
size
- Type:
number - Default:
32
Size (in bytes) of the targeted value.
ts
pad('0xa4e12a45', {
size: 16
})
// 0xa4e12a45000000000000000000000000