Swap

Swaps typically occur in two steps:

1. calc swap amount

Use functions provided by @magmaprotocol/calc_almm

import { get_swap_out, get_swap_in } from "@magmaprotocol/calc_almm";

Example

import { get_swap_out, get_swap_in } from "@magmaprotocol/calc_almm";

const pools = await magmaClmmSDK.Almm.getPoolInfo([
  "0x540e56df0e57ac0d779a64d1f9f01fe9ac03d4758623105e05b4f9facc5d0f61",
]);

const bins = await magmaClmmSDK.Almm.fetchBins({
  pair: "0x540e56df0e57ac0d779a64d1f9f01fe9ac03d4758623105e05b4f9facc5d0f61",
  coinTypeA:
    "0xdba34672e30cb065b1f93e3ab55318768fd6fef66c15942c9f7cb846e2f900e7::usdc::USDC",
  coinTypeB:
    "0x06864a6f921804860930db6ddbe2e16acdf8504495ea7481637a1c8b9a8fe54b::cetus::CETUS",
  offset: 0,
  limit: 500,
});

const params_str = JSON.stringify({
  params: pools[0].params,
  bins,
  bin_step: pools[0].bin_step,
});
const now_timestamp = Date.now();
const swap_out = get_swap_out(
  params_str,
  BigInt(10000),
  true,
  BigInt(now_timestamp),
);
console.log("swap_out: ", swap_out);
// { amount_in_left: 10, amount_out: 110849443, fee: 10 }

const swap_in = get_swap_in(
  params_str,
  BigInt(110849443),
  true,
  BigInt(now_timestamp),
);
console.log("swap_in: ", swap_in);
// { amount_in: 9999, amount_out_left: 0, fee: 10 }

Swap

Method

Method: sdk.Almm.swap({ pair: string coinTypeA: string coinTypeB: string amountIn: number minAmountOut: number swapForY: boolean to: string }: ALMMSwapParams )

Params

• pool_id: The pool object ID.

• coinTypeA: the coin type address about coinA.

• coinTypeB: the coin type address about coinB.

• amountIn: the amount of input coin

• minAmountOut: the amount limit of coin what you get.

• swapForY: if true, swap X to Y; if false, swap Y to X

• to: swap result will transfer to whom

Example:

const res = await magmaClmmSDK.Almm.swap({
  pair: "0x540e56df0e57ac0d779a64d1f9f01fe9ac03d4758623105e05b4f9facc5d0f61",
  coinTypeA:
    "0xdba34672e30cb065b1f93e3ab55318768fd6fef66c15942c9f7cb846e2f900e7::usdc::USDC",
  coinTypeB:
    "0x06864a6f921804860930db6ddbe2e16acdf8504495ea7481637a1c8b9a8fe54b::cetus::CETUS",

  amountIn: 9999,
  minAmountOut: 0,
  swapForY: true,
  to: "YourAddress",
});