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Changed a few variable names to make amm_sample.cairo clearer #48

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Changed a few variable names to make amm_sample.cairo clearer #48

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23 changes: 12 additions & 11 deletions src/starkware/starknet/apps/amm_sample/amm_sample.cairo
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Original file line number Diff line number Diff line change
Expand Up @@ -5,15 +5,16 @@ from starkware.cairo.common.hash import hash2
from starkware.cairo.common.math import assert_le, assert_nn_le, unsigned_div_rem
from starkware.starknet.common.syscalls import storage_read, storage_write

# The maximum amount of each token that belongs to the AMM.
const BALANCE_UPPER_BOUND = 2 ** 64

const TOKEN_TYPE_A = 1
const TOKEN_TYPE_B = 2

# Ensure the user's balances are much smaller than the pool's balance.
const POOL_UPPER_BOUND = 2 ** 30
const ACCOUNT_BALANCE_BOUND = 1073741 # 2**30 // 1000.
# Maximum amount of each token in a given pool or account.
const BALANCE_UPPER_BOUND = 2 ** 64

# Ensure the users' initial balances are much smaller than the pool's initial balance,
# so that they are able to swap against the pool.
const POOL_INIT_BALANCE_BOUND = 2 ** 30
const ACCOUNT_INIT_BALANCE_BOUND = 1073741 # 2**30 // 1000.

# A map from account and token type to the corresponding balance of that account.
@storage_var
Expand Down Expand Up @@ -126,9 +127,9 @@ end
func add_demo_token{syscall_ptr : felt*, pedersen_ptr : HashBuiltin*, range_check_ptr}(
account_id : felt, token_a_amount : felt, token_b_amount : felt
):
# Make sure the account's balance is much smaller then pool init balance.
assert_nn_le(token_a_amount, ACCOUNT_BALANCE_BOUND - 1)
assert_nn_le(token_b_amount, ACCOUNT_BALANCE_BOUND - 1)
# Make sure the account's balance is much smaller than pool init balance.
assert_nn_le(token_a_amount, ACCOUNT_INIT_BALANCE_BOUND - 1)
assert_nn_le(token_b_amount, ACCOUNT_INIT_BALANCE_BOUND - 1)

modify_account_balance(account_id=account_id, token_type=TOKEN_TYPE_A, amount=token_a_amount)
modify_account_balance(account_id=account_id, token_type=TOKEN_TYPE_B, amount=token_b_amount)
Expand All @@ -140,8 +141,8 @@ end
func init_pool{syscall_ptr : felt*, pedersen_ptr : HashBuiltin*, range_check_ptr}(
token_a : felt, token_b : felt
):
assert_nn_le(token_a, POOL_UPPER_BOUND - 1)
assert_nn_le(token_b, POOL_UPPER_BOUND - 1)
assert_nn_le(token_a, POOL_INIT_BALANCE_BOUND - 1)
assert_nn_le(token_b, POOL_INIT_BALANCE_BOUND - 1)

set_pool_token_balance(token_type=TOKEN_TYPE_A, balance=token_a)
set_pool_token_balance(token_type=TOKEN_TYPE_B, balance=token_b)
Expand Down