@docusign/iam-sdk/dist/esm/hooks/custom/oauth-token-request-hook.js

Developer-friendly & type-safe Typescript SDK specifically catered to leverage *@docusign/iam-sdk* API.

import { stringToBase64 } from "../../lib/base64.js";
export class OAuthTokenRequestHook {
    beforeRequest(hookCtx, request) {
        switch (hookCtx.operationID) {
            case "GetTokenFromRefreshToken":
            case "GetTokenFromConfidentialAuthCode": {
                let sec = hookCtx.securitySource;
                if (typeof sec === "function") {
                    sec = sec();
                }
                if (!sec) {
                    throw new Error("security source is not defined");
                }
                const { clientId, secretKey } = sec;
                if (clientId && secretKey) {
                    const encoded = stringToBase64([clientId || "", secretKey || ""].join(":"));
                    request.headers.set("Authorization", `Basic ${encoded}`);
                }
                break;
            }
        }
        return request;
    }
}
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