[Home](./index.md) > [ibm-cloud-sdk-core](./ibm-cloud-sdk-core.md) > [validateParams](./ibm-cloud-sdk-core.validateparams.md) ## validateParams() function Validates that "params" contains a value for each key listed in "requiredParams", and that each key contained in "params" is a valid key listed in "allParams". In essence, we want params to contain only valid keys and we want params to contain at least the required keys. **Signature:** ```typescript export declare function validateParams(params: { [key: string]: any; }, requiredParams: string[], allParams: string[]): null | Error; ``` ## Parameters

Parameter	Type	Description
params	{ \[key: string\]: any; }	the "params" object passed into an operation containing method parameters.
requiredParams	string\[\]	the names of required parameters. If null, then the "required params" check is bypassed.
allParams	string\[\]	the names of all valid parameters. If null, then the "valid params" check is bypassed.

**Returns:** null \| Error null if no errors found, otherwise an Error instance