UniswapV2LivePricing#

tradeexecutor.ethereum.uniswap_v2_live_pricing.UniswapV2LivePricing class.

class UniswapV2LivePricing[source]#

Bases: PricingModel

Always pull the latest dollar price for an asset from Uniswap v2 deployment.

Supports

  • Two-way BUSD -> Cake

  • Three-way trades BUSD -> BNB -> Cake

… within a single exchange.

Note

If a trade quantity/currency amount is not given uses a “default small value” that is 0.1. Depending on the token, this value might be too much/too little, as Uniswap fixed point math starts to break for very small amounts. For example, for USDC trade 10 cents is already quite low.

More information

__init__(web3, pair_universe, routing_model, very_small_amount=Decimal('0.10'))[source]#
Parameters

Methods

__init__(web3, pair_universe, routing_model)

check_supported_quote_token(pair)

get_buy_price(ts, pair, reserve)

Get live price on Uniswap.

get_pair_for_id(internal_id)

Look up a trading pair.

get_sell_price(ts, pair, quantity)

Get live price on Uniswap.

quantize_base_quantity(pair, quantity[, ...])

Convert any base token quantity to the native token units by its ERC-20 decimals.
__init__(web3, pair_universe, routing_model, very_small_amount=Decimal('0.10'))[source]#
Parameters
get_pair_for_id(internal_id)[source]#

Look up a trading pair.

Useful if a strategy is only dealing with pair integer ids.

Parameters

internal_id (int) –

Return type

TradingPairIdentifier

get_sell_price(ts, pair, quantity)[source]#

Get live price on Uniswap.

Parameters
Return type

USDollarAmount

get_buy_price(ts, pair, reserve)[source]#

Get live price on Uniswap.

Parameters
Returns

Price for one reserve unit e.g. a dollar

Return type

USDollarAmount

quantize_base_quantity(pair, quantity, rounding='ROUND_DOWN')[source]#

Convert any base token quantity to the native token units by its ERC-20 decimals.

Parameters
Return type

Decimal