insomnia/packages/insomnia-app/app/network/o-auth-1/constants.js

// @flow
export type OAuth1SignatureMethod = 'HMAC-SHA1' | 'RSA-SHA1' | 'PLAINTEXT';
export const SIGNATURE_METHOD_HMAC_SHA1: OAuth1SignatureMethod = 'HMAC-SHA1';
export const SIGNATURE_METHOD_RSA_SHA1: OAuth1SignatureMethod = 'RSA-SHA1';
export const SIGNATURE_METHOD_PLAINTEXT: OAuth1SignatureMethod = 'PLAINTEXT';