impost/example-app/server/api/pow/difficulty.put.ts

import { defineEventHandler } from 'h3'
import { ChallengeStrategy } from '@impost/lib';

export default defineEventHandler(async (event) => {
    const body = await readBody(event)

    let difficulty = body.difficulty;

    switch (config.strategy) {
        case ChallengeStrategy.LeadingZeroes:
            if (!difficulty || difficulty < 1 || difficulty > 64) {
                throw createError({
                    statusCode: 400,
                    statusMessage: 'Invalid request',
                });
            }

            config.leading_zeroes.difficulty = difficulty;
            break;
        case ChallengeStrategy.TargetNumber:
            if (!difficulty || difficulty < 1 || difficulty > 100_000_000) {
                throw createError({
                    statusCode: 400,
                    statusMessage: 'Invalid request',
                });
            }

            config.target_number.max_number = difficulty;
            break;
    }

    return {
        message: 'Challenge difficulty set'
    };
});