import { ethers } from 'ethers';

// 自定义Provider，使用uni.request替代原生fetch
class UniAppProvider extends ethers.providers.JsonRpcProvider {
  async send(method, params) {
    const payload = {
      method: method,
      params: params,
      id: Math.floor(Math.random() * 1000000),
      jsonrpc: "2.0"
    };
    
    return new Promise((resolve, reject) => {
      uni.request({
        url: this.connection.url,
        data: JSON.stringify(payload),
        method: 'POST',
        header: {
          'content-type': 'application/json'
        },
        success: (res) => {
          if (res.statusCode !== 200) {
            reject(new Error(`HTTP Error: ${res.statusCode}`));
            return;
          }
          if (res.data.error) {
            reject(new Error(res.data.error.message || JSON.stringify(res.data.error)));
            return;
          }
          resolve(res.data.result);
        },
        fail: (err) => {
          reject(new Error(err.errMsg || 'Request failed'));
        }
      });
    });
  }
}