import { BalancerApi, AddLiquidity } from "@balancer/sdk";
    ...
    const addLiquidityInput: AddLiquidityProportionalInput = {
      bptOut,
      chainId,
      rpcUrl,
      kind: AddLiquidityKind.Proportional,
    };

    const balancerApi = new BalancerApi('https://backend-v3-canary.beets-ftm-node.com/graphql', 1);
    const poolState = await balancerApi.pools.fetchPoolState('0x5f1d6874cb1e7156e79a7563d2b61c6cbce03150000200000000000000000586');
    const addLiquidity = new AddLiquidity();
    const queryOutput = await addLiquidity.query(addLiquidityInput, poolState);
    const { call, to, value, maxAmountsIn, minBptOut } =
        addLiquidity.buildCall({
            ...queryOutput,
            slippage,
            sender: signerAddress,
            recipient: signerAddress,
        });
    const client = createClient({
      ...
    })
    
    await client.sendTransaction({
      account: signerAddress,
      chain: client.chain,
      data: call,
      to,
      value,
    });

import { BalancerApi, RemoveLiquidity } from "@balancer/sdk";
...
const removeLiquidityInput: RemoveLiquiditySingleTokenExactInInput = {
  chainId,
  rpcUrl,
  bptIn,
  tokenOut,
  kind: RemoveLiquidityKind.SingleTokenExactIn,
};

const balancerApi = new BalancerApi('https://backend-v3-canary.beets-ftm-node.com/graphql', 1);
const poolState = await balancerApi.pools.fetchPoolState('0x5f1d6874cb1e7156e79a7563d2b61c6cbce03150000200000000000000000586');
const removeLiquidity = new RemoveLiquidity();
const queryOutput = await removeLiquidity.query(removeLiquidityInput, poolState);
const { call, to, value, maxAmountsIn, minBptOut } =
  removeLiquidity.buildCall({
    ...queryOutput,
    slippage,
    sender: signerAddress,
    recipient: signerAddress,
  });
const client = createClient({
  ...
})

await client.sendTransaction({
  account: signerAddress,
  chain: client.chain,
  data: call,
  to,
  value,
});