Stacks SDK

bun add @secondlayer/stacks

import { createWalletClient, http, mainnet } from "@secondlayer/stacks";
import { privateKeyToAccount } from "@secondlayer/stacks/accounts";
import { Cl } from "@secondlayer/stacks/clarity";

const client = createWalletClient({
  account: privateKeyToAccount(process.env.KEY!),
  chain: mainnet,
  transport: http(),
});

const txid = await client.callContract({
  contractAddress: "SP3K8BC0PPEVCV7NZ6QSRWPQ2JE9E5B6N3PA0KBR9",
  contractName: "usda-token",
  functionName: "transfer",
  functionArgs: [
    Cl.uint(1_000_000),
    Cl.principal(client.account.address),
    Cl.principal("SP2J6ZY48GV1EZ5V2V5RB9MP66SW86PYKKNRV9EJ7"),
    Cl.none(),
  ],
});

import { initSimnet } from "@stacks/clarinet-sdk";
import { createPublicClient } from "@secondlayer/stacks";
import { getContract } from "@secondlayer/stacks/actions";
import { SIP010_ABI } from "@secondlayer/stacks/clarity";
import { simnet, simnetChain } from "@secondlayer/stacks/simnet";

const session = await initSimnet("./Clarinet.toml");
const client = createPublicClient({
  chain: simnetChain,
  transport: simnet(session),
});
const deployer = session.getAccounts().get("deployer")!;
const token = getContract({
  client,
  address: deployer,
  name: "usda-token",
  abi: SIP010_ABI,
});
await token.read.getBalance({ account: deployer });

import { Pc } from "@secondlayer/stacks/postconditions";

const txid = await client.callContract({
  // …call as above
  postConditions: [
    Pc.origin()
      .willSendLte(1_000_000)
      .ft("SP3K8BC0PPEVCV7NZ6QSRWPQ2JE9E5B6N3PA0KBR9.usda-token", "usda"),
  ],
});

postConditions: [
  {
    type: "stx-postcondition",
    address: "origin",
    condition: "lte",
    amount: 1_000_000,
  },
]

const txid = await client.callContract({
  contractAddress: "SP000000000000000000002Q6VF78",
  contractName: "pox-5",
  functionName: "register-for-bond",
  functionArgs: [/* … */],
  postConditions: [
    {
      type: "staking-postcondition",
      address: "origin",
      condition: "lte",
      amount: 500_000_000_000n,
    },
    {
      type: "pox-postcondition",
      address: "origin",
      condition: "will-not-perform",
    },
  ],
});