Syntax

exchange.IO("encodePacked", ...)

Performs encodePacked encoding operations.


    
    
    
exchange.IO(k, dataFormat, ...args)

Examples

When using Uniswap V3, parameters such as trading path need to be passed in, which requires the use of encodePacked encoding operations.


    javascript
    
    
function main() {
    var fee = exchange.IO("encodePacked", "uint24", 3000)
    var tokenInAddress = "0x111111111117dC0aa78b770fA6A738034120C302"
    var tokenOutAddress = "0x6b175474e89094c44da98b954eedeac495271d0f"
    var path = tokenInAddress.slice(2).toLowerCase()
    path += fee + tokenOutAddress.slice(2).toLowerCase()
    Log("path:", path)
}

Returns

Type	Description
string	Data string that has been processed with `encodePacked` encoding.

Arguments

Name	Type	Required	Description
k	string	Yes	Functional mode of the `exchange.IO()` function. When set to `encodePacked`, it indicates that the function performs data `encodePacked` encoding operations.
dataFormat	string	Yes	Data type format and arrangement order for `encodePacked` encoding.
arg	string / number / array / any	Yes	Specific data values that match the format of the `dataFormat` parameter. There can be multiple `arg` parameters, and their type and quantity are determined by the settings of the `dataFormat` parameter. A tuple is passed as an array.