UniswapV2RoutingState#

tradeexecutor.ethereum.uniswap_v2_routing.UniswapV2RoutingState class.

class UniswapV2RoutingState[source]#

Bases: RoutingState

Manage transaction building for multiple Uniswap trades.

  • Lifespan is one rebalance - remembers already made approvals

  • Web3 connection and hot wallet

  • Approval tx creation

  • Swap tx creation

Manage the state of already given approvals here, so that we do not do duplicates.

The approvals are not persistent in the executor state, but are specific for each cycle.

__init__(pair_universe, tx_builder, swap_gas_limit=2000000)[source]#
Parameters

Methods

__init__(pair_universe, tx_builder[, ...])

check_has_enough_tokens(erc_20, amount)

Check we have enough buy side tokens to do a trade.

ensure_token_approved(token_address, ...)

Make sure we have ERC-20 approve() for the trade

get_uniswap_for_pair(factory_router_map, ...)

Get a router for a trading pair.

is_approved_on_chain(token_address, ...)

is_route_approved(router_address)

mark_router_approved(token_address, ...)

trade_on_router_three_way(uniswap, ...)

Prepare the actual swap for three way trade.

trade_on_router_two_way(uniswap, ...)

Prepare the actual swap.

Attributes

__init__(pair_universe, tx_builder, swap_gas_limit=2000000)[source]#
Parameters
get_uniswap_for_pair(factory_router_map, target_pair)[source]#

Get a router for a trading pair.

Parameters
Return type

UniswapV2Deployment

check_has_enough_tokens(erc_20, amount)[source]#

Check we have enough buy side tokens to do a trade.

This might not be the case if we are preparing transactions ahead of time and sell might have not happened yet.

Parameters
ensure_token_approved(token_address, router_address)[source]#

Make sure we have ERC-20 approve() for the trade

  • Infinite approval on-chain

  • …or previous approval in this state,

Parameters

  • token_address (str) –

  • router_address (str) –

Returns

Create 0 or 1 transactions if needs to be approved

Return type

List[BlockchainTransaction]

trade_on_router_two_way(uniswap, target_pair, reserve_asset, reserve_amount, max_slippage, check_balances)[source]#

Prepare the actual swap.

Parameters
trade_on_router_three_way(uniswap, target_pair, intermediary_pair, reserve_asset, reserve_amount, max_slippage, check_balances)[source]#

Prepare the actual swap for three way trade.

Parameters