@lodestar/params/lib/setPreset.js

Chain parameters required for lodestar

import { presetFromJson } from "./json.js";
import { PresetName } from "./presetName.js";
import { presetStatus } from "./presetStatus.js";
export { PresetName, presetFromJson };
/**
 * The preset name currently exported by this library
 *
 * The `LODESTAR_PRESET` environment variable is used to select the active preset
 * If `LODESTAR_PRESET` is not set, the default is `mainnet`.
 *
 * The active preset can be manually overridden with `setActivePreset`
 */
export let userSelectedPreset = null;
export let userOverrides = undefined;
/**
 * Override the active preset
 *
 * WARNING: Lodestar libraries rely on preset values being _constant_, so the active preset must be set _before_ loading any other lodestar libraries.
 *
 * Only call this function if you _really_ know what you are doing.
 *
 * @param presetName - the preset to use as a base
 * @param overrides - customized fields
 */
export function setActivePreset(presetName, overrides) {
    if (presetStatus.frozen) {
        throw Error(`Lodestar preset is already frozen. You must call setActivePreset() at the top of your
application entry point, before importing @lodestar/params, or any library that may import it.

\`\`\`
// index.ts
import {setActivePreset, PresetName} from "@lodestar/params/setPreset"
setActivePreset(PresetName.minimal)
// Now you can safely import from other paths and consume params
import {SLOTS_PER_EPOCH} from "@lodestar/params"
console.log({SLOTS_PER_EPOCH})
\`\`\`
`);
    }
    userSelectedPreset = presetName;
    userOverrides = overrides;
}
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