Support LiquidCroadloan and ForeignAsset as TradingPair for DEX

[zjb0807]

Acala/primitives/src/lib.rs

Lines 126 to 140 in e2cfafb

	impl TradingPair {
	pub fn from_currency_ids(currency_id_a: CurrencyId, currency_id_b: CurrencyId) -> Option<Self> {
	if (currency_id_a.is_token_currency_id() || currency_id_a.is_erc20_currency_id())
	&& (currency_id_b.is_token_currency_id() || currency_id_b.is_erc20_currency_id())
	&& currency_id_a != currency_id_b
	{
	if currency_id_a > currency_id_b {
	Some(TradingPair(currency_id_b, currency_id_a))
	} else {
	Some(TradingPair(currency_id_a, currency_id_b))
	}
	} else {
	None
	}
	}

Acala/primitives/src/currency.rs

Lines 222 to 227 in e2cfafb

	pub enum DexShare {
	Token(TokenSymbol),
	Erc20(EvmAddress),
	LiquidCroadloan(Lease),
	ForeignAsset(ForeignAssetId),
	}