isSignature

function isSignature(putativeSignature): putativeSignature is Signature;

A type guard that accepts a string as input. It will both return true if the string conforms to the Signature type and will refine the type for use in your program.

Parameters

ParameterType
putativeSignaturestring

Returns

putativeSignature is Signature

Example

import { isSignature } from '@solana/keys';
 
if (isSignature(signature)) {
    // At this point, `signature` has been refined to a
    // `Signature` that can be used with the RPC.
    const {
        value: [status],
    } = await rpc.getSignatureStatuses([signature]).send();
    setSignatureStatus(status);
} else {
    setError(`${signature} is not a transaction signature`);
}

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