# `Req.Checksum`
[🔗](https://github.com/wojtekmach/req/blob/v0.8.0-rc.0/lib/req/checksum.ex#L1)

Verifies the response body against the expected checksum.

## Request Options

  * `:checksum` - if set, this is the expected response body checksum.

    Can be one of:

      * `"md5:(...)"`
      * `"sha1:(...)"`
      * `"sha256:(...)"`

## Examples

    iex> resp = Req.get!("https://httpbingo.org/json", checksum: "sha1:ae5891fe71e8c6432b552b0c3b4394e43f151493")
    iex> resp.status
    200

    iex> Req.get!("https://httpbingo.org/json", checksum: "sha1:bad")
    ** (Req.ChecksumMismatchError) checksum mismatch
    expected: sha1:bad
    actual:   sha1:ae5891fe71e8c6432b552b0c3b4394e43f151493

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*Consult [api-reference.md](api-reference.md) for complete listing*