The `math/` and `adapter/` modules in this directory are vendored from the
`curve-math` and `curve-adapter` crates:

    https://github.com/sunce86/curve-math

The vendored code corresponds to the tree of commit fb3b25c (identical to its
parent 518aac1), which is the last revision published under the MIT license.
Subsequent upstream revisions are licensed under BUSL-1.1 and are NOT included;
the post-MIT features (the StableSwapSTETH variant, the TwoCryptoV1 `eth_variant`
distinction, and the StableSwapALend `+1` `get_D` quirk) were re-derived
independently from Curve Finance's public Vyper contracts.

Upstream MIT license:

    MIT License

    Copyright (c) curve-math authors (Dusan Stanivukovic and contributors)

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.
