August Digital SDK

TypeScript SDK for interacting with August Digital vaults across EVM, Solana, Stellar, and Sui chains.

Installation

npm install @augustdigital/sdk ethers
# or
pnpm add @augustdigital/sdk ethers
# or
yarn add @augustdigital/sdk ethers

Wagmi/Viem Support

The SDK supports both ethers and wagmi/viem signers. If you're using wagmi in your React app, also install viem:

npm install viem

The SDK automatically converts viem WalletClient to an ethers-compatible signer.

Quick Start

import AugustSDK from '@augustdigital/sdk';

const sdk = new AugustSDK({
  // Required: stable kebab-case slug identifying your application.
  appName: 'acme-trader',
  providers: {
    1: 'https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY',
    42161: 'https://arb-mainnet.g.alchemy.com/v2/YOUR_KEY',
    -1: 'https://api.mainnet-beta.solana.com', // Solana
  },
  keys: {
    august: 'YOUR_API_KEY', // Optional: vault reads, allocations and vault-linked sub-account reads work without it
  },
  monitoring: {
    env: 'DEV', // Optional: 'DEV' enables console logging (defaults to 'PROD')
  },
});

// Fetch all vaults
const vaults = await sdk.getVaults();

// Fetch a specific vault with loans and allocations
const vault = await sdk.getVault({
  vault: '0x...',
  options: { loans: true, allocations: true },
});

// Get user positions
const positions = await sdk.getVaultPositions({
  wallet: '0x...',
  showAllVaults: true,
});

App Name

appName is required on every AugustSDK constructor call. Pass a stable kebab-case slug identifying your application (e.g. 'acme-trader', 'my-defi-app'):

• What it's used for. August Digital tags analytics events with app.name = <yourSlug> to attribute error spikes and prioritize bug fixes by consuming app.
• What it is not. Not a secret, not a license key, not a display label. Pick a slug once and reuse it across deployments.
• Constraints. 3–64 characters, only [a-zA-Z0-9._-]. The SDK throws synchronously from the constructor if the value is missing or invalid.

// Will throw — appName is required.
new AugustSDK({ providers: { /* ... */ } } as any);

// Will throw — spaces not allowed. Use 'acme-trader'.
new AugustSDK({ appName: 'Acme Trader', providers: { /* ... */ } });

// Correct.
new AugustSDK({ appName: 'acme-trader', providers: { /* ... */ } });

Origin-Code Attribution (SwapRouter)

An integrator with an origin (referral / fee-sharing) code registered on the SwapRouter sets it once on the SDK instance. Deposits made through the SDK then carry it on-chain:

const sdk = new AugustSDK({
  appName: 'acme-trader',
  providers: { 1: 'https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY' },
  attribution: {
    originCode: '0x…', // bytes32 registered on the SwapRouter with addOrigin
    strictOrigin: false, // optional: true throws instead of falling back
  },
});

// Check the code before you ship it.
const { registered, originFeeBps, collector } = await sdk.getOriginInfo({
  chainId: 1,
  originCode: '0x…',
});

• Ethereum mainnet only. The instance code is sent on chain 1 (ORIGIN_ATTRIBUTION_CHAINS) and on no other chain, even where a SwapRouter is configured.

• Where it applies. vaultDeposit sends a deposit through SwapRouter.deposit with the code when sdk.evm.getDepositRoute() returns via: 'router': the vault is registered on the router, the vault accepts the asset as-is (its reference asset, or a Tokenized Vault V2 whitelisted asset — never swapped), the router whitelists the asset, the router is not paused, the deposit is not a permit, native-token or adapter deposit, and the code is registered. swapRouterDeposit, swapAndDeposit, depositViaSwapRouter and depositNativeViaSwapRouter send it too.

• Precedence. An originCode passed to a router method wins, then the instance code, then the all-zero sentinel (no origin fee). Pass the zero sentinel to opt one call out.

• Fallback. When the code cannot be applied — it is not registered, the chain is not mainnet, the router is paused (router-paused, checked with a 15-second cache) or does not whitelist the asset, the vault does not accept it or is not registered on the router, or it is a permit, native-token or adapter deposit — vaultDeposit takes the vault's native path and logs vaultDeposit:attribution-skipped with the reason (Sentry tag sdk.attribution.origin=skipped). The router methods send the zero sentinel for an unregistered instance code and log <method>:attribution-skipped. With strictOrigin: true an unregistered instance code throws AugustValidationError before any approval instead; a paused router falls back to native even then. An originCode passed to a router method that is not registered always throws AugustValidationError before any approval. While the router is paused, the router methods throw AugustSDKError (context.reason: 'router-paused') before any approval.

• Approve route.spender, not the vault. A routed deposit is pulled by the SwapRouter. vaultDeposit and approve handle this; if you send approvals yourself, read the spender first:

  const route = await sdk.evm.getDepositRoute({ target: vault, depositAsset: usdc });
  // route.spender is the SwapRouter when route.via === 'router', else the vault (or adapter wrapper)
  

• Gas. Measured on a mainnet fork (repeat 1,000 USDC deposits into Core USDC): direct deposit 102,067 gas; router with a 0% code 161,744 (+59.7k); router with a 1% code 173,135 (+71.1k). A routed deposit also needs a one-time approval of the router per token.

• Zero-fee codes. A code registered with a 0 bps fee is valid for attribution only, but the router emits no OriginFeeApplied event for it. Its deposits are attributable only from the transaction calldata and SDK telemetry.

• Process-global. attribution is process-global: the last AugustSDK constructed wins, and one constructed without attribution clears it. Run one attribution configuration per process.

Architecture

src.ts/
├── main.ts              # Main SDK class (AugustSDK)
├── core/                # Base utilities
│   ├── base.class.ts    # Base SDK functionality
│   ├── fetcher.ts       # API client with retry logic
│   └── web3.helpers.ts  # Blockchain utilities
├── adapters/            # Chain-specific implementations
│   ├── evm/             # EVM adapter (approve, deposit, redeem, read helpers)
│   ├── solana/          # Solana program adapters
│   ├── stellar/         # Stellar vault adapters
│   └── sui/             # Sui (Ember) vault adapters
├── evm/                 # EVM cross-chain (LayerZero OVault)
├── modules/             # Feature modules
│   ├── vaults/          # Vault read operations
│   ├── sub-accounts/    # Sub-account queries
│   └── api/             # August backend API integration
├── services/            # External service integrations
│   ├── debank/          # DeFi allocation data
│   ├── coingecko/       # Token pricing
│   └── subgraph/        # Historical transaction data
└── types/               # TypeScript interfaces

Key Concepts

Multi-Chain Support

• EVM Chains: Ethereum, Arbitrum, Base, BSC, Avalanche, and more — wagmi/viem and ethers signers supported
• Solana: Native Solana program support with full vault functionality
• Stellar: Stellar vault deposit, redeem, and position queries
• Sui: Ember vault read operations
• Unified interface across all chains

Vault Versions

• evm-0/evm-1: Legacy vault contracts
• evm-2: Current EVM vault architecture (separate receipt tokens)
• sol-0: Solana program-based vaults
• stellar-0: Stellar-based vaults

Data Enrichment

All vault queries support optional enrichment:

• loans: Include active loan data
• allocations: DeFi/CeFi/OTC position breakdowns
• wallet: User-specific position data

API Reference

Vault Queries

User Positions

Points

Write Operations (top-level)

Cross-Chain (LayerZero)

Utilities

Sub-Accounts (sdk.subAccountsModule)

EVM Adapter (sdk.evm)

Set a signer before calling write methods:

// ethers
import { JsonRpcProvider, Wallet } from 'ethers';
const wallet = new Wallet(process.env.PRIVATE_KEY!, new JsonRpcProvider(rpcUrl));
sdk.evm.setSigner(wallet);

// wagmi/viem (browser)
import { useWalletClient } from 'wagmi';
const { data: walletClient } = useWalletClient();
if (walletClient) sdk.evm.setSigner(walletClient);

Write methods:

Read helpers (return raw bigint):

Solana Adapter (sdk.solana)

Stellar Adapter (sdk.stellar)

Sui Adapter (sdk.sui)

Code Conventions

Naming Patterns

• Interfaces: Prefixed with I (e.g., IVault, IVaultLoan)
• ABIs: Prefixed with ABI_ (e.g., ABI_LENDING_POOL_V2)
• Types: Descriptive names (e.g., IAddress, IChainId)

Special Comment Tags

Search the codebase for these to find important areas:

• @todo: Planned improvements or missing features
• @hardcoded: Hardcoded values that may need configuration
• @solana: Solana-specific logic or notes

Error Handling

Every public method throws typed errors that subclass AugustSDKError:

import { AugustValidationError, AugustTimeoutError, AugustSDKError } from '@augustdigital/sdk';

try {
  await sdk.evm.vaultDeposit({ target: '0x...', wallet: owner, amount: '1' });
} catch (err) {
  if (err instanceof AugustValidationError) showFormError(err.message);
  else if (err instanceof AugustTimeoutError) scheduleRetry(err.timeoutMs);
  else if (err instanceof AugustSDKError) reportError(err.code, err.cause);
  else throw err;
}

• Automatic retry with exponential backoff for network errors
• 90-second request timeout (configurable via REQUEST_TIMEOUT_MS)
• Correlation IDs in errors for debugging

Environment Configuration

// Development mode — enables console logging
const sdk = new AugustSDK({ appName: 'my-app', providers: { /* ... */ }, monitoring: { env: 'DEV' } });

// Production mode — default, no console logs
const sdk = new AugustSDK({ appName: 'my-app', providers: { /* ... */ } });

Development

Running Tests

pnpm test

Building

pnpm build

Support

• Issues: GitHub Issues
• Documentation: docs.augustdigital.io
• Example App: starter.upshift.finance