Rust smart contract for Solana liquidity pools with variable token number.

To build the Pool program, use the normal build command for Solana programs:

cargo build-bpf

To deploy the pool program:

1. Check that the TOKEN_COUNT const is set to the number of constituent tokens you want the pool program to initialize
2. Build the program:

cargo build-bpf

3. Deploy the program using:

solana program deploy --program-id <path_to_keypair> ./target/deploy/pool.so

4. To adjust the number of constituent tokens for the Pool Program, adjust the TOKEN_COUNT const in src/lib.rs then rebuild and deploy the program to a new program_id

Audit scheduled, starting ~Nov 1st 2021

Pools with 4 Tokens: SWiMBJS9iBU1rMLAKBVfp73ThW1xPPwKdBHEU2JFpuo

Pools with 6 Tokens: SWiMDJYFUGj6cPrQ6QYYYWZtvXQdRChSVAygDZDsCHC

cd swim/pool
# run all tests
cargo test-bpf -- --show-output
# run all tests with suppressed noisy logs
cargo test-bpf -- --show-output --nocapture --test-threads=1 2>&1 | ./sol_spam_filter.py
# run specific test
cargo test-bpf -- --test test_pool_init --show-output

The honggfuzz library is incompatable with macOS big sur and above (as of 11/01/2021). The workaround is to run the fuzzing tests within a docker container and was based on the solution found here

# 1. build docker container (only have to do this one time)
$ docker build -t pool .
# 2. run docker container
# $ docker run -it --security-opt seccomp=unrestricted -v $(pwd):/app/ pool bash 
$ docker run -it --privileged -v $(pwd):/app/ pool bash 
# should be in the docker container now
$ cd fuzz
$ BPF_OUT_DIR="/app/target/deploy" HFUZZ_RUN_ARGS="-t 100 -N 1000 -Q  " cargo hfuzz run pool_fuzz 
# redirect output to files
$ BPF_OUT_DIR="/app/target/deploy" HFUZZ_RUN_ARGS="-t 100 -N 500 -Q -d -v" cargo hfuzz run pool_fuzz > test_output.txt 2>&1
# -t = timeout in seconds
# -n = number of threads
# -N = number of iterations
# --exit_upon_crash

# run fuzz debugger 
# file for fuzz can be found in /app/fuzz/hfuzz_workspace/pool_fuzz/HONGGFUZZ.REPORT.TXT
$ BPF_OUT_DIR="/app/target/deploy" cargo hfuzz run-debug pool_fuzz 'hfuzz_workspace/pool_fuzz/SIGABRT.PC.7f3088fedce1.STACK.19a84c71ce.CODE.-6.ADDR.0.INSTR.mov____0x108(%rsp),%rax.fuzz'

If you encounter the following error during the docker build or docker run stage, in Docker Desktop go to "Preferences" -> "Resources" and increase the memory and swap then retry again:

"fatal error: ld terminated with signal 9"

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