Awesome

Starknet AMM Tutorial

https://starknet.io/docs/hello_starknet/amm.html#amm-starknet

Compile

$ starknet-compile amm_sample.cairo \
    --output amm_sample_compiled.json \
    --abi amm_sample_abi.json

Get token balances for each pool

$ starknet call \
    --address ${AMM_ADDRESS} \
    --abi amm_sample_abi.json \
    --function get_pool_token_balance \
    --inputs 1

$ starknet call \
    --address ${AMM_ADDRESS} \
    --abi amm_sample_abi.json \
    --function get_pool_token_balance \
    --inputs 2

Add demo tokens for the account, 1000 of each

$ starknet invoke \
    --address ${AMM_ADDRESS} \
    --abi amm_sample_abi.json \
    --function add_demo_token \
    --inputs ${ACCOUNT_ID} 1000 1000

Get account balance for token 1 and 2 (A and B)

Should start with 1000 for A and 1000 for B

$ starknet call \
    --address ${AMM_ADDRESS} \
    --abi amm_sample_abi.json \
    --function get_account_token_balance \
    --inputs ${ACCOUNT_ID} 1

Perform the swap

$ starknet invoke \
    --address ${AMM_ADDRESS} \
    --abi amm_sample_abi.json \
    --function swap \
    --inputs ${ACCOUNT_ID} 1 500

Query for updated balance

If you run get_account_token_balance again, you should now have 500 for token 1, and 1000 + b for 2 (where b is based on the constant product formula) b = (y * a) + (x + a)

$ starknet call \
    --address ${AMM_ADDRESS} \
    --abi amm_sample_abi.json \
    --function get_account_token_balance \
    --inputs ${ACCOUNT_ID} 1