import { HF_ACCESS_TOKEN, HF_API_ROOT } from "$env/static/private"; import { sum } from "$lib/utils/sum"; import type { BackendModel } from "./models"; /** * Find a random load-balanced endpoint */ export function modelEndpoint(model: BackendModel): { url: string; authorization: string; weight: number; } { if (!model.endpoints) { return { url: `${HF_API_ROOT}/${model.name}`, authorization: `Bearer ${HF_ACCESS_TOKEN}`, weight: 1, }; } const endpoints = model.endpoints; const totalWeight = sum(endpoints.map((e) => e.weight)); let random = Math.random() * totalWeight; for (const endpoint of endpoints) { if (random < endpoint.weight) { return endpoint; } random -= endpoint.weight; } throw new Error("Invalid config, no endpoint found"); }