How to use @aws-sdk/property-provider - 10 common examples

throw new ProviderError(
        `Detected a cycle attempting to resolve credentials for profile` +
          ` ${getMasterProfileName(options)}. Profiles visited: ` +
          Object.keys(visitedProfiles).join(", "),
        false
      );
    }

    const sourceCreds = resolveProfileData(source_profile, profiles, options, {
      ...visitedProfiles,
      [source_profile]: true
    });
    const params: AssumeRoleParams = { RoleArn, RoleSessionName, ExternalId };
    if (mfa_serial) {
      if (!options.mfaCodeProvider) {
        throw new ProviderError(
          `Profile ${profileName} requires multi-factor authentication,` +
            ` but no MFA code callback was provided.`,
          false
        );
      }
      params.SerialNumber = mfa_serial;
      params.TokenCode = await options.mfaCodeProvider(mfa_serial);
    }

    return options.roleAssumer(await sourceCreds, params);
  }

  // If no role assumption metadata is present, attempt to load static
  // credentials from the selected profile.
  if (isStaticCredsProfile(data)) {
    return resolveStaticCredentials(data);

return options.roleAssumer(await sourceCreds, params);
  }

  // If no role assumption metadata is present, attempt to load static
  // credentials from the selected profile.
  if (isStaticCredsProfile(data)) {
    return resolveStaticCredentials(data);
  }

  // If the profile cannot be parsed or contains neither static credentials
  // nor role assumption metadata, throw an error. This should be considered a
  // terminal resolution error if a profile has been specified by the user
  // (whether via a parameter, an environment variable, or another profile's
  // `source_profile` key).
  throw new ProviderError(
    `Profile ${profileName} could not be found or parsed in shared` +
      ` credentials file.`
  );
}

it(`should reject the promise is ${ENV_REGION} is not set`, async () => {
    await expect(fromEnv()()).rejects.toMatchObject(
      new ProviderError(
        `No value defined for the AWS_REGION environment variable`
      )
    );
  });

it("should convert a GetCredentialsForIdentity response without credentials to a provider error", async () => {
    send.mockImplementationOnce(() => Promise.resolve({ identityId }));

    await expect(
      fromCognitoIdentity({
        client: mockClient,
        identityId,
        customRoleArn: "myArn"
      })()
    ).rejects.toMatchObject(
      new ProviderError("Response from Amazon Cognito contained no credentials")
    );
  });

function throwOnMissingId(): never {
  throw new ProviderError(
    "Response from Amazon Cognito contained no identity ID"
  );
}

return Promise.reject(
        new ProviderError(
          `${parsed.protocol} is not a valid container metadata service protocol`,
          false
        )
      );
    }

    return Promise.resolve({
      ...parsed,
      port: parsed.port ? parseInt(parsed.port, 10) : undefined
    });
  }

  return Promise.reject(
    new ProviderError(
      "The container metadata credential provider cannot be used unless" +
        ` the ${ENV_CMDS_RELATIVE_URI} or ${ENV_CMDS_FULL_URI} environment` +
        " variable is set",
      false
    )
  );
}

function getCmdsUri(): Promise {
  if (process.env[ENV_CMDS_RELATIVE_URI]) {
    return Promise.resolve({
      hostname: CMDS_IP,
      path: process.env[ENV_CMDS_RELATIVE_URI]
    });
  }

  if (process.env[ENV_CMDS_FULL_URI]) {
    const parsed = parse(process.env[ENV_CMDS_FULL_URI]!);
    if (!parsed.hostname || !(parsed.hostname in GREENGRASS_HOSTS)) {
      return Promise.reject(
        new ProviderError(
          `${parsed.hostname} is not a valid container metadata service hostname`,
          false
        )
      );
    }

    if (!parsed.protocol || !(parsed.protocol in GREENGRASS_PROTOCOLS)) {
      return Promise.reject(
        new ProviderError(
          `${parsed.protocol} is not a valid container metadata service protocol`,
          false
        )
      );
    }

    return Promise.resolve({

function throwOnMissingAccessKeyId(): never {
  throw new ProviderError(
    "Response from Amazon Cognito contained no access key ID"
  );
}

export function defaultProvider(
  configuration: RegionProviderConfiguration = {}
): Provider {
  return memoize(
    chain(fromEnv(configuration), fromSharedConfigFiles(configuration))
  );
}

export function defaultProvider(
  init: FromIniInit & RemoteProviderInit & FromProcessInit = {}
): CredentialProvider {
  const { profile = process.env[ENV_PROFILE] } = init;
  const providerChain = profile
    ? fromIni(init)
    : chain(fromEnv(), fromIni(init), fromProcess(init), remoteProvider(init));

  return memoize(
    providerChain,
    credentials =>
      credentials.expiration !== undefined &&
      credentials.expiration - getEpochTs() < 300,
    credentials => credentials.expiration !== undefined
  );
}