Syntax

exchange.IO("unwrap", ...)

Unwraps the wrapped token (such as WETH or WBNB) into the native coin (such as ETH or BNB), 1:1 without slippage, costing only gas.


    
    
    
exchange.IO(k, amount)

Examples

Unwrap all WETH into ETH.


    javascript
    
    
function main() {
    var r = exchange.IO("unwrap", "all")
    if (!r) {
        Log("unwrap failed:", GetLastError())
        return
    }
    var rc = exchange.IO("receipt", r.txHash, 120000)
    Log(r.from, "→", r.to, r.amount, "status:", rc.status)
}

Returns

Type	Description
object / null value	Returns `{txHash, action, from, to, amount, raw}` when the transaction is broadcast successfully. Returns a null value and outputs an error message when the wrapped token balance is insufficient or zero.

Arguments

Name	Type	Required	Description
k	string	Yes	Fixed as `unwrap`, which means unwrapping wrapped tokens.
amount	string / number	Yes	The amount of wrapped tokens to unwrap, in human-readable units. Passing it as a string is recommended. Set it to `all` to unwrap the entire wrapped token balance.