senchahq / sencha

Sencha is an automated market maker for Solana tokens.

Sencha 🍵

Sencha is an automated market maker for Solana tokens.

We're in active development. For the latest updates, please join our community:

• Twitter: https://twitter.com/SenchaDEX
• Chat: https://chat.sencha.so

Note

• Sencha is in active development, so all APIs are subject to change.
• This code is unaudited. Use at your own risk.

Packages

Package	Description	Version	Docs
cpamm	Constant product automated market maker.
xyk	Constant product AMM calculator used for Sencha.
@senchahq/sencha-sdk	TypeScript SDK for Sencha

Addresses

Program addresses are the same on devnet, testnet, and mainnet-beta.

• CpAmm: SCHAtsf8mbjyjiv4LkhLKutTf6JnZAbdJKFkXQNMFHZ

Developing

# Setup
yarn install
yarn idl:generate
anchor build

# Testing
yarn test:e2e

# Building SDK
yarn build

Contribution

Thank you for your interest in contributing to Sencha Protocol! All contributions are welcome no matter how big or small. This includes (but is not limited to) filing issues, adding documentation, fixing bugs, creating examples, and implementing features.

When contributing, please make sure your code adheres to some basic coding guidelines:

• Code must be formatted with the configured formatters (e.g. rustfmt and prettier).
• Comment lines should be no longer than 80 characters and written with proper grammar and punctuation.
• Commit messages should be prefixed with the package(s) they modify. Changes affecting multiple packages should list all packages. In rare cases, changes may omit the package name prefix.

License

Sencha Protocol is licensed under the AGPL-3.0 license.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Sencha Protocol by you, as defined in the AGPL-3.0 license, shall be licensed as above, without any additional terms or conditions.

sencha's Issues

Build fails

Trying to run the commands in the readme. Fails at the anchor build step.

soldev@glide:~/senchadexupstream/sencha$ anchor build
BPF SDK: /home/soldev/.local/share/solana/install/releases/1.8.0/solana-release/bin/sdk/bpf
Running: rustup toolchain list -v
Running: rustup toolchain uninstall bpf
info: uninstalling toolchain 'bpf'
info: toolchain 'bpf' uninstalled
Running: rustup toolchain link bpf /home/soldev/.local/share/solana/install/releases/1.8.0/solana-release/bin/sdk/bpf/dependencies/bpf-tools/rust
Running: cargo +bpf build --target bpfel-unknown-unknown --release
    Updating crates.io index
error: failed to download `solana-frozen-abi v1.9.2`

Caused by:
  unable to get packages from source

Caused by:
  failed to parse manifest at `/home/soldev/.cargo/registry/src/github.com-1ecc6299db9ec823/solana-frozen-abi-1.9.2/Cargo.toml`

Caused by:
  feature `edition2021` is required

  consider adding `cargo-features = ["edition2021"]` to the manifest

Swap not working with prior TokenApprove instruction

Program throws > Program log: Key mismatch: output.user.owner must be user.user_authority if a delegated token account is defined as input owner and that delegated token account itself is not the owner of the output token account (typical scenario for swaps. Temporary delegated token account -> Used as input for Swap -> Output goes to original owner).

Example anchor program to use cpamm crate

Make an example program that utilizes the cpamm crate to demonstrate how to CPI invoke in anchor.

0.9.4 / 0.9.6 build fails

30 \| #[program]
--
911 | \| ^^^^^^^^^^ method not found in `account_structs::NewSwap<'_>`
912 | \|
913 | ::: /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/cpamm-0.9.6/src/account_structs.rs:36:1
914 | \|
915 | 36 \| pub struct NewSwap<'info> {
916 | \| ------------------------- method `exit` not found for this
917 | \|
918 | = help: items from traits can only be used if the trait is implemented and in scope
919 | = note: the following trait defines an item `exit`, perhaps you need to implement it:
920 | candidate #1: `anchor_lang::AccountsExit`
921 | = note: this error originates in the attribute macro `program` (in Nightly builds, run with -Z macro-backtrace for more info)
922 |  
923 | error[E0599]: no function or associated item named `try_accounts` found for struct `account_structs::NewSwapMeta` in the current scope
924 | --> /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/cpamm-0.9.6/src/lib.rs:30:1
925 | \|

Edit: getting similar errors for cpamm-0.9.4

cpamms's Cargo.toml

I guess it's due to and anchor-lang v0.20.1 being used in my build

anchor-lang = ">=0.17.0"
anchor-spl = ">=0.17.0" 

Make Fees configurable during swap initialization

Update dependencies

Dependencies are not up2date.

https://github.com/SenchaHQ/sencha/blob/master/programs/cpamm/Cargo.toml

What is the factory address in mainnet?

Can't get IDL

yarn install
yarn idl:generate

➤ YN0000: └ Completed in 4s 397ms
➤ YN0000: Done with warnings in 59s 962ms
Parsing IDL for cpamm
thread 'main' panicked at 'Could not resolve Accounts symbol', lang/syn/src/idl/file.rs:450:22
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
Could not parse IDL

Cumulative stats doesn't take into account the initial pool creation

Allow for fee withdraw