Calling Smart Contracts

Calling Smart Contracts

Deploy and interact with Algorand smart contracts using AlgoKit CLI and the generated TypeScript client.

Overview / Core Workflow

1. Build the contract: algokit project run build
2. Deploy using CLI: algokit project deploy localnet
3. Write TypeScript scripts using the generated client
4. Run scripts: npx tsx scripts/​my-script.ts

How to proceed

1. Build the Contract

algokit project run build

This compiles your contract and generates:

• artifacts/<ContractName>/<ContractName>.arc56.json — ARC-56 app spec
• artifacts/<ContractName>/​client.ts — Generated TypeScript client

2. Deploy to Localnet

# Start localnet if not running
algokit localnet start

# Deploy (runs deploy-config.ts)
algokit project deploy localnet

The deployment script (smart_contracts/​deploy-config.ts) handles:

• Idempotent deployment (safe to re-run)
• App ID tracking
• Initial state setup

Note the App ID from the deployment output.

3. Interact Using Generated Client

Create scripts in your project to call contract methods. Example structure:

// scripts/​call-contract.ts
import { AlgorandClient } from '@algorandfoundation/​algokit-utils'
import { CounterClient } from '../​smart_contracts/​artifacts/​Counter/​client'

async function main() {
  // Connect to localnet
  const algorand = AlgorandClient.fromEnvironment()

  // Get the default account (localnet dispenser)
  const deployer = await algorand.account.fromEnvironment('DEPLOYER')

  // Create client for deployed app
  const client = algorand.client.getTypedAppClientById(CounterClient, {
    appId: BigInt(1234), // Replace with actual App ID
    sender: deployer,
  })

  // Call a method
  const result = await client.send.increment({})
  console.log('New count:', result.return)

  // Read global state
  const state = await client.state.global.getAll()
  console.log('Global state:', state)
}

main().catch(console.error)

Run with:

npx tsx scripts/​call-contract.ts

4. Common Operations

Call a Method

// No arguments
const result = await client.send.increment({})

// With arguments
const result = await client.send.setValue({ args: { value: 42n } })

// Access return value
console.log('Return:', result.return)

Read Global State

// Get all global state
const state = await client.state.global.getAll()

// Get specific key (if typed in contract)
const count = await client.state.global.count()

Read Local State

// Get local state for an address
const localState = await client.state.local(address).getAll()

Opt-In to Application

// If contract has an opt_in method
await client.send.optIn.optIn({})

// Or use bare opt-in
await client.send.optIn.bare({})

Read Box Storage

// If contract uses boxes
const boxValue = await client.state.box.myBox()

Bulk Opt-In/​Opt-Out

For batch operations across multiple assets:

// Bulk opt-in to multiple assets
const group = algorand.newGroup()
for (const assetId of assetIds) {
  group.addAssetOptIn({ sender: account.addr, assetId })
}
await group.send()

// Bulk opt-out from multiple assets
const closeGroup = algorand.newGroup()
for (const assetId of assetIds) {
  closeGroup.addAssetOptOut({ sender: account.addr, assetId, creator: creatorAddr })
}
await closeGroup.send()

Important Rules / Guidelines

• Always build before deploying: Run algokit project run build to generate fresh artifacts
• Use generated clients: They provide type safety and handle ABI encoding
• Check App ID: Get it from deployment output, don't hardcode across environments
• Use environment variables: Store sensitive data like mnemonics in .env
• Localnet accounts: Use algorand.account.fromEnvironment('DEPLOYER') for localnet

Common Variations / Edge Cases

Environment Setup

For non-localnet deployments, set environment variables:

# .env file
ALGORAND_NETWORK=testnet
DEPLOYER_MNEMONIC="your twenty four word mnemonic phrase here"

References / Further Reading

• CLI Commands Reference
• AlgoKit Utils Documentation
• ARC-56 App Spec Standard
• Testing Contracts