Build an FT post-condition

import { Pc } from '@stacks/transactions';

// Create a post-condition for fungible token transfers
const postCondition = Pc.principal("ST1PQHQKV0RJXZFY1DGX8MNSNYVE3VGZJSRTPGZGM")
  .willSendGte(500) // Amount in token's smallest unit
  .ft("ST1HTBVD3JG9C05J7HBJTHGR0GGW7KXW28M5JS8QE.token-ft", "my-token");

// Use in transaction options
const txOptions = {
  // ... other transaction options
  postConditions: [postCondition],
  postConditionMode: PostConditionMode.Deny,
};

// Greater than or equal
const gtePC = Pc.principal(address).willSendGte(500).ft(contract, token);

// Less than or equal
const ltePC = Pc.principal(address).willSendLte(1000).ft(contract, token);

// Exact amount
const exactPC = Pc.principal(address).willSendEq(750).ft(contract, token);

// Greater than
const gtPC = Pc.principal(address).willSendGt(100).ft(contract, token);

// Less than
const ltPC = Pc.principal(address).willSendLt(2000).ft(contract, token);

import {
  AnchorMode,
  FungibleConditionCode,
  makeContractFungiblePostCondition,
  makeStandardFungiblePostCondition,
  Pc,
  PostConditionMode,
} from '@stacks/transactions';

// Using the Pc builder
const ftPostCondition = Pc.principal(senderAddress)
  .willSendEq(1000)
  .ft(contractAddress + '.sip010-token', 'wrapped-btc');

// Alternative: Using the standard function
const altPostCondition = makeStandardFungiblePostCondition(
  senderAddress,
  FungibleConditionCode.Equal,
  1000n,
  createAssetInfo(contractAddress, 'sip010-token', 'wrapped-btc')
);