solana/web3.js/src/timing.js

// @flow

// These constants should match the values in
// https://github.com/solana-labs/solana/blob/master/sdk/src/timing.rs
export const NUM_TICKS_PER_SECOND = 10;
export const DEFAULT_TICKS_PER_SLOT = 160;
export const DEFAULT_SLOTS_PER_EPOCH = 64;