Function fragment

packages/app/src/utils/server-scope.ts:10–13

(label: string, value: string)

const separator = "\u0000"

function fragment(label: string, value: string) {
  if (value.includes(separator)) throw new Error(`${label} cannot contain null bytes`)
  return value
}

function compose(scope: ServerScope, parts: string[]) {
  return [fragment("Server scope", scope), ...parts.map((part) => fragment("Scoped key part", part))].join(separator)