Convert Fiat Currency to Fiat Currency

POST /v1/common/convert/fiatToFiat

Parameter	Type	Required	Description
inCurrency	`String`	Yes	The code of the source fiat currency (e.g., USD, EUR).
inAmount	`String`	Yes	The amount to be converted.
outCurrency	`String`	Yes	The code of the target fiat currency (e.g., CNY, JPY).
timestamp	`Long`	Yes	UNIX timestamp (in milliseconds).

Parameter	Type	Required	Description
outAmount	`String`	Yes	The converted amount in the target fiat currency.

{
    "code": 200,
    "msg": "success",
    "timestamp": "1725674596300",
    "data": {
        "outAmount": "588.66"
    }
}