Contract con_altswap
| Creator | ff61544ea94eaaeb5df08ed863c4a938e9129aba6ceee5f31b6681bdede11b89 |
| Creation Hash | 11de7ac581ffa87f5fc45ba356eead78e4fe9451b7693c28a1495cd9671e92ec |
| Created On | 664 days ago - 6/29/2022, 6:45:58 AM UTC+0 |
Contract Code
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I = importlib
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token_interface = [I.Func('transfer', args=('amount', 'to')), I.Func(
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'approve', args=('amount', 'to')), I.Func('transfer_from', args=(
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'amount', 'to', 'main_account'))]
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pools = Hash(default_value=False)
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pools_creation_values = Hash(default_value=False)
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pool_weights = Hash(default_value=False)
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lp_tokens_users = Hash(default_value=0.0)
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lp_tokens_total = Hash(default_value=0.0)
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lp_tokens_approvals = Hash(default_value=0.0)
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fee = Variable()
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operator = Variable()
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@construct
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def seed():
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fee.set(0.4)
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operator.set("ff61544ea94eaaeb5df08ed863c4a938e9129aba6ceee5f31b6681bdede11b89")
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@export
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def createWeightedPool(poolName: str, assets: dict, weights: dict):
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assert pools[poolName] == False, "A pool with this name already exists"
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sum_assets = 0
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for contract, amount in assets.items():
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assert amount > 0, "Amounts need to be more then 0"
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sum_assets += amount
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for contract, amount in assets.items():
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assert amount == sum_assets / 100 * (weights[contract] * 100), "Token Amount and Weights are not matching"
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for contract, amount in assets.items():
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token = I.import_module(contract)
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assert I.enforce_interface(token, token_interface
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), f'Invalid token interface for {contract}!'
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token.transfer_from(amount=amount, to=ctx.this, main_account=ctx.caller)
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pools[poolName, contract] = amount
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pools_creation_values[poolName, contract] = amount
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pool_weights[poolName, contract] = weights[contract]
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lp_tokens_users[poolName, ctx.caller] = 100
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lp_tokens_total[poolName] = 100
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return poolName
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@export
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def addLiquidity(poolName: str, assets: dict):
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sum_assets_deposit = 0
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sum_assets = 0
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for contract, amount in assets.items():
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assert amount > 0, "Amounts need to be more then 0"
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sum_assets_deposit += amount
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sum_assets += pools_creation_values[poolName, contract]
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for contract,amount in assets.items():
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assert amount == sum_assets_deposit / 100 * (pool_weights[poolName, contract] * 100), "Token Amount and Weights are not matching"
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for contract, amount in assets.items():
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token = I.import_module(contract)
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assert I.enforce_interface(token, token_interface
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), f'Invalid token interface for {contract}!'
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token.transfer_from(amount=amount, to=ctx.this, main_account=ctx.caller)
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pools[poolName, contract] += amount
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total_lp_points = lp_tokens_total[poolName]
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lp_to_mint = (sum_assets_deposit / sum_assets) * 100
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lp_tokens_total[poolName] += lp_to_mint
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lp_tokens_users[poolName, ctx.caller] += lp_to_mint
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return lp_to_mint
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@export
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def removeLiquidity(poolName: str, amountLPTokens: float):
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assert amountLPTokens <= lp_tokens_users[poolName, ctx.caller], "You don't own that many LP points"
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assert lp_tokens_total[poolName] - amountLPTokens > 1, "You need to leave atleast 1 LP point"
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assert amountLPTokens > 0, "Needs to more then 0"
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total_lp_points = lp_tokens_total[poolName]
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for contract in pools[poolName].all():
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amount = pools[poolName, contract] / total_lp_points * amountLPTokens
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token.transfer(amount=amount, to=ctx.caller)
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pools[poolName, contract] -= amount
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lp_tokens_total[poolName] -= amountLPTokens
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lp_tokens_users[poolName, ctx.caller] -= amountLPTokens
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@export
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def transferLiquidity(poolName: str, amountLPTokens: float, to: str):
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assert amountLPTokens <= lp_tokens_users[poolName, ctx.caller], "You don't own that many LP points"
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assert amountLPTokens > 0, "Needs to more then 0"
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lp_tokens_users[poolName, ctx.caller] -= amountLPTokens
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lp_tokens_users[poolName, to] += amountLPTokens
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@export
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def approveLiquidity(poolName: str, amountLPTokens: float, main_account: str, to: str):
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assert amountLPTokens <= lp_tokens_users[poolName, ctx.caller], "You don't own that many LP points"
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assert amountLPTokens > 0, "Needs to more then 0"
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lp_tokens_approvals[poolName, ctx.caller, to] += amountLPTokens
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@export
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def transferLiquidityFrom(poolName: str, amountLPTokens: float, main_account: str, to: str):
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assert amountLPTokens <= lp_tokens_users[poolName, main_account], "Not enough LP points to send"
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assert amountLPTokens > 0, "Needs to more then 0"
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lp_tokens_users[poolName, main_account] -= amountLPTokens
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lp_tokens_users[poolName, to] += amountLPTokens
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lp_tokens_approvals[poolName, main_account, to] -= amountLPTokens
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@export
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def swap(poolName: str, amountFrom: float, contractFrom: str, contractTo: str):
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assert amountFrom > 0, "Needs to more then 0"
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fee_amount = amountFrom/100*fee.get()
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swap_amount = amountFrom - fee_amount
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local_balances = [pools[poolName, contractFrom], pools[poolName, contractTo]]
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local_weights = [pool_weights[poolName, contractFrom], pool_weights[poolName, contractTo]]
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final_amount = calc_out_given_in(local_balances[0], local_weights[0], local_balances[1], local_weights[1], swap_amount)
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fromToken = I.import_module(contractFrom)
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toToken = I.import_module(contractTo)
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fromToken.transfer_from(amount=swap_amount, to=ctx.this, main_account=ctx.caller)
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fromToken.transfer_from(amount=fee_amount, to=operator.get(), main_account=ctx.caller)
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pools[poolName, contractFrom] += swap_amount
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toToken.transfer(amount=final_amount, to= ctx.caller)
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pools[poolName, contractTo] -= swap_amount
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return final_amount
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def calc_out_given_in(balance_in: decimal,
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weight_in: decimal,
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balance_out: decimal,
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weight_out: decimal,
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amount_in: decimal):
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denominator = balance_in + amount_in
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base = div(balance_in, denominator)
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exponent = div(weight_in, weight_out)
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power = powerIt(base, exponent)
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return mul(balance_out, complement(power))
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def mul(a: decimal, b: decimal):
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return a*b
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def div(a: decimal, b: decimal):
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result = a/b
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return result
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def complement(a: decimal):
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return (1 - a) if a < 1 else 0
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def powerIt(a: decimal,b:decimal):
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return a**b
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Byte Code
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