Stableswap

[jonator]

Here are our final core stableswap functions:

• Out amount given in
• In amount given out
• Core solver for both of the above (only math-y part)

The solver is the same for both and runs mostly boilerplate binary search on the CFMM, which is defined here (the comments about the solver function I linked in the third bullet point should explain its logic in detail) (edited)

Basically for Out Given In, we pass in a negative yIn to the solver (i.e. the “out” amount), which gives us the correct but negative output, which we have to negate

[AlpinYukseloglu]

Unit tests:

• Out amount given in
• In amount given out
• Core solver

[jonator]

• Implement getNormalizedLiquidity @AlpinYukseloglu

Stableswap implementation:

osmosis-frontend/packages/pools/src/stable.ts

Lines 311 to 319 in 3a4ae28

	getNormalizedLiquidity(tokenInDenom: string, tokenOutDenom: string): Dec {
	const tokenOut = this.getPoolAsset(tokenOutDenom);
	const tokenIn = this.getPoolAsset(tokenInDenom);
	return tokenOut.amount
	.toDec()
	.mul(new Dec(tokenIn.scalingFactor))
	.quo(new Dec(tokenIn.scalingFactor).add(new Dec(tokenOut.scalingFactor))); // TODO: ensure this works in router
	}

Weighted implementation:

osmosis-frontend/packages/pools/src/weighted.ts

Lines 350 to 358 in 3a4ae28

	getNormalizedLiquidity(tokenInDenom: string, tokenOutDenom: string): Dec {
	const tokenIn = this.getPoolAsset(tokenInDenom);
	const tokenOut = this.getPoolAsset(tokenOutDenom);
	return tokenOut.amount
	.toDec()
	.mul(tokenIn.weight.toDec())
	.quo(tokenIn.weight.toDec().add(tokenOut.weight.toDec()));
	}

[jonator]

• Iconography on pools page
• Label on pool detail page
• New create pool workflow
• Only multi asset join pool