上传出租车电子发票文件

服务商调用插卡接口前，需调用本接口上传出租车电子发票文件来获取文件ID。文件ID有效期为3天，有效期内未成功调用插卡接口需重新调用本接口上传发票文件。 官方文档

const { Multipart } = require('wechatpay-axios-plugin')
const { createReadStream } = require('fs')
const { basename } = require('path')

const localFilePath = '/path/to/merchant-invoice-file.pdf'
const stream = createReadStream(localFilePath)
const media = new Multipart()
  .append('meta', JSON.stringify({
    company_mchid,
    region_id,
    digest_algorithm: 'DIGEST_ALGORITHM_SM3',
    digest: 'from upstream or local calculated',
  }))
  .append('file', stream, basename(localFilePath))

wxpay.v3.taxiInvoice.cards.uploadFile.post(media)
.then(
  ({ 
    data: {
      fapiao_media_id,
    },
  }) => ({
    fapiao_media_id,
  })
)