Contract AI Coding Reference

Copy this page into your AI coding assistant (Cursor, Copilot, Claude, etc.) for accurate Amplify vault direct contract completions.

This page is a condensed, single-file reference for calling Amplify vault contracts directly — without the SDK. For full documentation with interactive examples, see the Direct Contract Integration guides.

Contract Source

Open-source Solidity: github.com/paxoslabs/nucleus-boring-vault

Architecture

Contract	Role	GraphQL Field
DistributorCodeDepositor	Deposits (standard + permit)	`vault.communityCodeDepositorModuleId`
WithdrawQueue	Withdrawal orders + cancellations (ERC-721 per order)	`vault.withdrawQueueModuleId`
BoringVault	ERC-20 vault share token (18 decimals)	`vault.boringVaultAddress`
Accountant	Exchange rate oracle	`vault.accountantModuleId`
Teller	Pause state	`vault.tellerModuleId`
FeeModule	Withdrawal fee calculator	Obtained via `WithdrawQueue.feeModule()`

communityCodeDepositorModuleId is a legacy GraphQL field name. It returns the DistributorCodeDepositor address.

Obtain Addresses — GraphQL API

POST https://api.paxoslabs.com/graphql
Headers: Content-Type: application/json, x-api-key: <YOUR_API_KEY>

Query

query AmplifySdkConfigs($chainId: Int, $yieldType: YieldType) {
  amplifySdkConfigs(chainId: $chainId, yieldType: $yieldType) {
    id
    chainId
    yieldType
    vault {
      id
      name
      chainId
      boringVaultAddress
      tellerModuleId
      accountantModuleId
      withdrawQueueModuleId
      communityCodeDepositorModuleId
      supportedAssets {
        address
        chainId
        depositable
        withdrawable
        symbol
        tokenName
        decimals
      }
    }
  }
}

Example cURL

curl -s -X POST "https://api.paxoslabs.com/graphql" \
  -H "Content-Type: application/json" \
  -H "x-api-key: $AMPLIFY_API_KEY" \
  -d '{
    "query": "query AmplifySdkConfigs($chainId: Int, $yieldType: YieldType) { amplifySdkConfigs(chainId: $chainId, yieldType: $yieldType) { id chainId yieldType vault { id name chainId boringVaultAddress tellerModuleId accountantModuleId withdrawQueueModuleId communityCodeDepositorModuleId supportedAssets { address chainId depositable withdrawable symbol tokenName decimals } } } }",
    "variables": { "chainId": 1 }
  }' | jq

Response Shape

{
  "data": {
    "amplifySdkConfigs": [
      {
        "id": "config-id",
        "chainId": 1,
        "yieldType": "CORE",
        "vault": {
          "id": "vault-id",
          "name": "Amplify Core",
          "chainId": 1,
          "boringVaultAddress": "0x...",
          "tellerModuleId": "0x...",
          "accountantModuleId": "0x...",
          "withdrawQueueModuleId": "0x...",
          "communityCodeDepositorModuleId": "0x...",
          "supportedAssets": [
            {
              "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
              "chainId": 1,
              "depositable": true,
              "withdrawable": true,
              "symbol": "USDC",
              "tokenName": "USD Coin",
              "decimals": 6
            }
          ]
        }
      }
    ]
  }
}

Multiple configs can reference the same vault. Deduplicate by vault.id. withdrawQueueModuleId and communityCodeDepositorModuleId can be null if the vault doesn’t support those operations.

GraphQL Variables

Variable	Type	Description
`chainId`	`Int`	Filter by chain (e.g., `1` for Ethereum, `8453` for Base)
`yieldType`	`YieldType`	Filter by yield type: `CORE`, `TREASURY`, `FRONTIER`, `PRIME`, `TBILL`, `LENDING`

ABIs

DistributorCodeDepositor

[
  {
    "inputs": [
      { "name": "depositAsset", "type": "address" },
      { "name": "depositAmount", "type": "uint256" },
      { "name": "minimumMint", "type": "uint256" },
      { "name": "to", "type": "address" },
      { "name": "distributorCode", "type": "bytes" }
    ],
    "name": "deposit",
    "outputs": [{ "name": "shares", "type": "uint256" }],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      { "name": "depositAsset", "type": "address" },
      { "name": "depositAmount", "type": "uint256" },
      { "name": "minimumMint", "type": "uint256" },
      { "name": "to", "type": "address" },
      { "name": "distributorCode", "type": "bytes" },
      { "name": "deadline", "type": "uint256" },
      { "name": "v", "type": "uint8" },
      { "name": "r", "type": "bytes32" },
      { "name": "s", "type": "bytes32" }
    ],
    "name": "depositWithPermit",
    "outputs": [{ "name": "shares", "type": "uint256" }],
    "stateMutability": "nonpayable",
    "type": "function"
  }
]

WithdrawQueue

[
  {
    "inputs": [
      {
        "components": [
          { "name": "amountOffer", "type": "uint256" },
          { "name": "wantAsset", "type": "address" },
          { "name": "intendedDepositor", "type": "address" },
          { "name": "receiver", "type": "address" },
          { "name": "refundReceiver", "type": "address" },
          {
            "components": [
              { "name": "approvalMethod", "type": "uint8" },
              { "name": "approvalV", "type": "uint8" },
              { "name": "approvalR", "type": "bytes32" },
              { "name": "approvalS", "type": "bytes32" },
              { "name": "submitWithSignature", "type": "bool" },
              { "name": "deadline", "type": "uint256" },
              { "name": "eip2612Signature", "type": "bytes" }
            ],
            "name": "signatureParams",
            "type": "tuple"
          }
        ],
        "name": "params",
        "type": "tuple"
      }
    ],
    "name": "submitOrder",
    "outputs": [{ "name": "orderIndex", "type": "uint256" }],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [{ "name": "orderIndex", "type": "uint256" }],
    "name": "cancelOrder",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      { "name": "orderIndex", "type": "uint256" },
      { "name": "deadline", "type": "uint256" },
      { "name": "cancelSignature", "type": "bytes" }
    ],
    "name": "cancelOrderWithSignature",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [{ "name": "orderIndex", "type": "uint256" }],
    "name": "getOrderStatus",
    "outputs": [{ "name": "", "type": "uint8" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "minimumOrderSize",
    "outputs": [{ "name": "", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "feeModule",
    "outputs": [{ "name": "", "type": "address" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [{ "name": "owner", "type": "address" }],
    "name": "balanceOf",
    "outputs": [{ "name": "", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      { "name": "owner", "type": "address" },
      { "name": "index", "type": "uint256" }
    ],
    "name": "tokenOfOwnerByIndex",
    "outputs": [{ "name": "", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [{ "name": "tokenId", "type": "uint256" }],
    "name": "ownerOf",
    "outputs": [{ "name": "", "type": "address" }],
    "stateMutability": "view",
    "type": "function"
  }
]

ERC-20 (BoringVault shares + deposit tokens)

[
  {
    "inputs": [
      { "name": "spender", "type": "address" },
      { "name": "amount", "type": "uint256" }
    ],
    "name": "approve",
    "outputs": [{ "name": "", "type": "bool" }],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      { "name": "owner", "type": "address" },
      { "name": "spender", "type": "address" }
    ],
    "name": "allowance",
    "outputs": [{ "name": "", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [{ "name": "account", "type": "address" }],
    "name": "balanceOf",
    "outputs": [{ "name": "", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "decimals",
    "outputs": [{ "name": "", "type": "uint8" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [{ "name": "owner", "type": "address" }],
    "name": "nonces",
    "outputs": [{ "name": "", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  }
]

Accountant

[
  {
    "inputs": [{ "name": "quote", "type": "address" }],
    "name": "getRateInQuoteSafe",
    "outputs": [{ "name": "rateInQuote", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  }
]

FeeModule

[
  {
    "inputs": [
      { "name": "amount", "type": "uint256" },
      { "name": "offerAsset", "type": "address" },
      { "name": "wantAsset", "type": "address" },
      { "name": "receiver", "type": "address" }
    ],
    "name": "calculateOfferFees",
    "outputs": [{ "name": "feeAmount", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "offerFeePercentage",
    "outputs": [{ "name": "", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  }
]

Teller

[
  {
    "inputs": [],
    "name": "isPaused",
    "outputs": [{ "name": "", "type": "bool" }],
    "stateMutability": "view",
    "type": "function"
  }
]

Pre-Flight: Pause State Check

Before submitting any deposit or withdrawal transaction, check whether the vault is paused:

const paused = await publicClient.readContract({
  address: TELLER,
  abi: tellerAbi,
  functionName: 'isPaused',
})
if (paused) throw new Error('Vault is paused — transactions will revert with TellerIsPaused')

Deposit Flow — Standard (Approve + Deposit)

Two transactions: ERC-20 approve() then deposit().

// Step 1: Check allowance
const allowance = await publicClient.readContract({
  address: DEPOSIT_TOKEN,
  abi: erc20Abi,
  functionName: 'allowance',
  args: [account.address, DISTRIBUTOR_CODE_DEPOSITOR],
})

// Step 2: Approve if needed
if (allowance < depositAmount) {
  // USDT QUIRK: if token is USDT and allowance > 0, reset to 0 first
  // await walletClient.writeContract({ address: DEPOSIT_TOKEN, abi: erc20Abi, functionName: 'approve', args: [DISTRIBUTOR_CODE_DEPOSITOR, 0n] })
  const hash = await walletClient.writeContract({
    address: DEPOSIT_TOKEN,
    abi: erc20Abi,
    functionName: 'approve',
    args: [DISTRIBUTOR_CODE_DEPOSITOR, depositAmount],
  })
  await publicClient.waitForTransactionReceipt({ hash })
}

// Step 3: Calculate minimumMint (slippage protection)
const rate = await publicClient.readContract({
  address: ACCOUNTANT,
  abi: accountantAbi,
  functionName: 'getRateInQuoteSafe',
  args: [DEPOSIT_TOKEN],
})
const SLIPPAGE_BPS = 50n // 0.5%
const expectedShares = (depositAmount * 10n ** 18n) / rate
const minimumMint = expectedShares - (expectedShares * SLIPPAGE_BPS) / 10000n

// Step 4: Deposit
const hash = await walletClient.writeContract({
  address: DISTRIBUTOR_CODE_DEPOSITOR,
  abi: depositorAbi,
  functionName: 'deposit',
  args: [DEPOSIT_TOKEN, depositAmount, minimumMint, account.address, '0x'],
})
const receipt = await publicClient.waitForTransactionReceipt({ hash })

Deposit Parameters

Parameter	Type	Description
`depositAsset`	`address`	ERC-20 token to deposit (e.g., USDC)
`depositAmount`	`uint256`	Amount in token’s smallest unit (USDC 6 decimals: 1000 USDC = `1000000000`)
`minimumMint`	`uint256`	Min shares to receive (slippage protection). `0` to disable.
`to`	`address`	Recipient of minted vault shares
`distributorCode`	`bytes`	Referral code as bytes. `0x` if none.

Distributor Codes

If Paxos Labs provided a distributor code, encode it as bytes: toHex('your_code') in JS, b'your_code' in Python, []byte("your_code") in Go. Otherwise pass 0x / b"" / []byte{}.

Deposit Flow — Permit (Single Transaction)

For tokens supporting EIP-2612 (USDC, USDG, pyUSD, USD₮0). Not available for USDT. Not available for smart contract wallets (Privy Smart Wallets, Safe) — they cannot sign typed data.

// Step 1: Get permit nonce
const nonce = await publicClient.readContract({
  address: DEPOSIT_TOKEN,
  abi: erc20Abi,
  functionName: 'nonces',
  args: [account.address],
})

// Step 2: Sign EIP-712 permit
const deadline = BigInt(Math.floor(Date.now() / 1000) + 3600)
const signature = await walletClient.signTypedData({
  account,
  domain: {
    name: 'USD Coin',        // varies by token — must match token's EIP-712 domain
    version: '2',            // varies by token
    chainId: 1,
    verifyingContract: DEPOSIT_TOKEN,
  },
  types: {
    Permit: [
      { name: 'owner', type: 'address' },
      { name: 'spender', type: 'address' },
      { name: 'value', type: 'uint256' },
      { name: 'nonce', type: 'uint256' },
      { name: 'deadline', type: 'uint256' },
    ],
  },
  primaryType: 'Permit',
  message: {
    owner: account.address,
    spender: DISTRIBUTOR_CODE_DEPOSITOR,
    value: depositAmount,
    nonce,
    deadline,
  },
})

// Step 3: Parse signature into v, r, s
const { v, r, s } = parseSignature(signature) // viem: import { parseSignature } from 'viem'

// Step 4: Calculate minimumMint (same as standard flow)
const rate = await publicClient.readContract({
  address: ACCOUNTANT,
  abi: accountantAbi,
  functionName: 'getRateInQuoteSafe',
  args: [DEPOSIT_TOKEN],
})
const expectedShares = (depositAmount * 10n ** 18n) / rate
const minimumMint = expectedShares - (expectedShares * 50n) / 10000n

// Step 5: depositWithPermit (single transaction — no separate approve needed)
const hash = await walletClient.writeContract({
  address: DISTRIBUTOR_CODE_DEPOSITOR,
  abi: depositorAbi,
  functionName: 'depositWithPermit',
  args: [DEPOSIT_TOKEN, depositAmount, minimumMint, account.address, '0x', deadline, v, r, s],
})

Permit EIP-712 Domain (varies by token)

Token	`name`	`version`
USDC	`"USD Coin"`	`"2"`
USDG	Check token	Check
pyUSD	Check token	Check
USD₮0	Check token	Check

Always read the token’s name(), version() (or EIP712_VERSION()) and use those for the domain.

Slippage / minimumMint Formula

rate           = Accountant.getRateInQuoteSafe(depositTokenAddress)
expectedShares = (depositAmount × 1e18) / rate
minimumMint    = expectedShares × (10000 − SLIPPAGE_BPS) / 10000

Common default: SLIPPAGE_BPS = 50 (0.5%). Setting minimumMint = 0 disables slippage protection (fine for testing, not production).

Withdrawal Flow (Complete)

Withdrawals are order-based, not instant. The vault operator fulfills orders (typically within 24 hours).

// Step 1: Check share balance
const shareBalance = await publicClient.readContract({
  address: BORING_VAULT,
  abi: erc20Abi,
  functionName: 'balanceOf',
  args: [account.address],
})

// Step 2: Convert want amount to shares
const rate = await publicClient.readContract({
  address: ACCOUNTANT,
  abi: accountantAbi,
  functionName: 'getRateInQuoteSafe',
  args: [WANT_ASSET], // e.g., USDC address
})
const wantAmount = parseUnits('1000', 6) // 1000 USDC
let sharesNeeded = (wantAmount * 10n ** 18n) / rate

// Step 3: Calculate withdrawal fee
const feeModuleAddr = await publicClient.readContract({
  address: WITHDRAW_QUEUE,
  abi: queueAbi,
  functionName: 'feeModule',
})
const feeAmount = await publicClient.readContract({
  address: feeModuleAddr,
  abi: feeModuleAbi,
  functionName: 'calculateOfferFees',
  args: [sharesNeeded, BORING_VAULT, WANT_ASSET, account.address],
})
// Fee is deducted from offered shares. To receive full wantAmount, add fee:
sharesNeeded = sharesNeeded + feeAmount

// Step 4: Check minimum order size
const minimumShares = await publicClient.readContract({
  address: WITHDRAW_QUEUE,
  abi: queueAbi,
  functionName: 'minimumOrderSize',
})
if (sharesNeeded < minimumShares) throw new Error('Below minimum order size')

// Step 5: Approve vault shares to WithdrawQueue
const allowance = await publicClient.readContract({
  address: BORING_VAULT,
  abi: erc20Abi,
  functionName: 'allowance',
  args: [account.address, WITHDRAW_QUEUE],
})
if (allowance < sharesNeeded) {
  const hash = await walletClient.writeContract({
    address: BORING_VAULT,
    abi: erc20Abi,
    functionName: 'approve',
    args: [WITHDRAW_QUEUE, sharesNeeded],
  })
  await publicClient.waitForTransactionReceipt({ hash })
}

// Step 6: Submit withdrawal order
const EMPTY_SIG = {
  approvalMethod: 0,
  approvalV: 0,
  approvalR: ('0x' + '00'.repeat(32)) as `0x${string}`,
  approvalS: ('0x' + '00'.repeat(32)) as `0x${string}`,
  submitWithSignature: false,
  deadline: 0n,
  eip2612Signature: '0x' as `0x${string}`,
}

const hash = await walletClient.writeContract({
  address: WITHDRAW_QUEUE,
  abi: queueAbi,
  functionName: 'submitOrder',
  args: [
    {
      amountOffer: sharesNeeded,
      wantAsset: WANT_ASSET,
      intendedDepositor: account.address, // MUST match msg.sender
      receiver: account.address,
      refundReceiver: account.address,
      signatureParams: EMPTY_SIG,
    },
  ],
})
const receipt = await publicClient.waitForTransactionReceipt({ hash })
// Extract orderIndex from receipt logs or return value

// Step 7: Poll for completion
let status = 1
while (status === 1) {
  await new Promise((r) => setTimeout(r, 60_000))
  status = await publicClient.readContract({
    address: WITHDRAW_QUEUE,
    abi: queueAbi,
    functionName: 'getOrderStatus',
    args: [orderIndex],
  })
}
// status 2 = COMPLETE, 5 = REFUNDED, 6 = FAILED_TRANSFER_REFUNDED

submitOrder Parameters

Field	Type	Description
`amountOffer`	`uint256`	Vault shares to offer (18 decimals)
`wantAsset`	`address`	Token to receive (e.g., USDC). Must be `withdrawable`.
`intendedDepositor`	`address`	Must match `msg.sender`
`receiver`	`address`	Where the want asset is sent when fulfilled
`refundReceiver`	`address`	Where shares go if order is cancelled
`signatureParams`	`tuple`	Pass all-zeros struct for standard ERC-20 approval flow

rate         = Accountant.getRateInQuoteSafe(wantAssetAddress)
sharesNeeded = (wantAmount × 1e18) / rate

Withdrawal Fee Calculation

feeModuleAddr = WithdrawQueue.feeModule()
feeAmount     = FeeModule.calculateOfferFees(shareAmount, boringVaultAddress, wantAssetAddress, receiverAddress)
feePercentage = FeeModule.offerFeePercentage()  // 18-decimal precision, e.g., 5000000000000000 = 0.5%

Fee is subtracted from offered shares. To receive the full want amount, offer sharesNeeded + feeAmount.

Cancellation Flow — Direct

Only orders with PENDING status (value 1) can be cancelled. The WithdrawQueue is an ERC-721 — each order is an NFT.

// Enumerate order NFTs
const count = await publicClient.readContract({
  address: WITHDRAW_QUEUE,
  abi: queueAbi,
  functionName: 'balanceOf',
  args: [account.address],
})
for (let i = 0n; i < count; i++) {
  const orderIndex = await publicClient.readContract({
    address: WITHDRAW_QUEUE,
    abi: queueAbi,
    functionName: 'tokenOfOwnerByIndex',
    args: [account.address, i],
  })
  const status = await publicClient.readContract({
    address: WITHDRAW_QUEUE,
    abi: queueAbi,
    functionName: 'getOrderStatus',
    args: [orderIndex],
  })
  if (status === 1) {
    // PENDING — cancel it
    const hash = await walletClient.writeContract({
      address: WITHDRAW_QUEUE,
      abi: queueAbi,
      functionName: 'cancelOrder',
      args: [orderIndex],
    })
    await publicClient.waitForTransactionReceipt({ hash })
    // Shares returned to refundReceiver set during submitOrder
  }
}

If you already have the orderIndex (from the OrderSubmitted event), skip enumeration and call cancelOrder(orderIndex) directly after verifying getOrderStatus(orderIndex) === 1.

Cancellation Flow — Meta-Transaction (Gasless)

A relayer submits the cancellation on behalf of the order owner using an EIP-712 signature.

EIP-712 Cancel Signature

// Order owner signs off-chain
const cancelDeadline = BigInt(Math.floor(Date.now() / 1000) + 3600)
const signature = await walletClient.signTypedData({
  account,
  domain: {
    name: 'WithdrawQueue',
    chainId: 1,
    verifyingContract: WITHDRAW_QUEUE,
  },
  types: {
    Cancel: [
      { name: 'orderIndex', type: 'uint256' },
      { name: 'deadline', type: 'uint256' },
      { name: 'queueAddress', type: 'address' },
      { name: 'chainId', type: 'uint256' },
    ],
  },
  primaryType: 'Cancel',
  message: {
    orderIndex,
    deadline: cancelDeadline,
    queueAddress: WITHDRAW_QUEUE,
    chainId: 1n,
  },
})

// Relayer submits (anyone can call this)
await walletClient.writeContract({
  address: WITHDRAW_QUEUE,
  abi: queueAbi,
  functionName: 'cancelOrderWithSignature',
  args: [orderIndex, cancelDeadline, signature],
})

The deadline in the signed message and the function call must match exactly. Reverts with SignatureExpired if the block timestamp exceeds the deadline.

REST API Endpoints

All require x-api-key: <your_key> header. Base URL: https://api.paxoslabs.com

Vault APY

GET /v2/amplify/vaultApys?filter=vaultAddress%3D{VAULT_ADDRESS}&orderByTimestamp=desc&pageSize=1

{ "vaultApys": [{ "vaultAddress": "0x...", "chainId": 1, "apy": "0.0523", "timestamp": "2025-01-15T12:00:00Z" }] }

apy is a decimal string — multiply by 100 for percentage (e.g., 0.0523 = 5.23%).

Vault TVL

GET /v2/amplify/vaultTvls?filter=vaultAddress%3D{VAULT_ADDRESS}&includeCurrent=true&orderByTimestamp=desc&pageSize=1

{ "vaultTvls": [{ "vaultAddress": "0x...", "chainId": 1, "tvl": "15234567.89", "timestamp": "2025-01-15T12:00:00Z" }] }

Vault Assets (simplified vault discovery)

GET /v2/amplify/vaultAssets?pageSize=100

{
  "vaultAssets": [{ "vaultAddress": "0x...", "chainId": 1, "assetAddress": "0x...", "depositable": true, "withdrawable": true }],
  "nextPageToken": null,
  "tokenMetadata": { "1:0xA0b8...": { "address": "0xA0b8...", "chain_id": "1", "symbol": "USDC", "name": "USD Coin", "decimals": "6" } }
}

Only returns vaultAddress (BoringVault). Use the GraphQL API for full contract addresses.

Withdrawal Requests

GET /v2/amplify/withdrawalRequests?filter=userAddress%3D{USER_ADDRESS}&pageSize=20

{
  "withdrawalRequests": [{
    "orderIndex": "42", "userAddress": "0x...", "vaultAddress": "0x...", "chainId": 1,
    "offerAmount": "1000000000000000000", "wantAsset": "0x...", "status": "PENDING",
    "createdAt": "2025-01-15T10:30:00Z", "fulfilledAt": null
  }],
  "nextPageToken": null
}

REST status values: PENDING, COMPLETE, PENDING_REFUND, REFUNDED.

Order Status Enum (On-Chain)

Value	Status	Cancellable?
0	NOT_FOUND	No
1	PENDING	Yes
2	COMPLETE	No
3	COMPLETE_PRE_FILLED	No
4	PENDING_REFUND	No
5	COMPLETE_REFUNDED	No
6	FAILED_TRANSFER_REFUNDED	No

Token Notes

Token	Decimals	Permit (EIP-2612)	Notes
USDC	6	Yes	—
USDG	6	Yes	—
pyUSD	6	Yes	—
USD₮0	6	Yes	—
USDT	6	No	Must reset allowance to 0 before setting new value

For USDT: if current allowance > 0, call approve(spender, 0) first, then approve(spender, amount). Smart contract wallets (Privy Smart Wallets, Safe) cannot sign permits — use the standard approve + deposit flow.

Common Revert Errors

Error	Cause	Fix
`TellerIsPaused`	Vault operations paused	Check `Teller.isPaused()` before submitting
`PermitFailedAndAllowanceTooLow`	Invalid permit sig and no existing ERC-20 approval	Fix EIP-712 domain params or use approve flow
`ERC20: insufficient allowance`	Spender not approved	Call `approve()` on token first
`ERC20: transfer amount exceeds balance`	Insufficient token balance	Check `balanceOf()` before transacting
`AmountBelowMinimum`	Withdrawal order below minimum size	Check `WithdrawQueue.minimumOrderSize()`
`InvalidDepositor`	`intendedDepositor` ≠ `msg.sender`	Set `intendedDepositor` to the transaction sender
`AssetNotSupported`	Want asset not enabled for this vault	Check `supportedAssets` with `withdrawable: true`
`OnlyOrderOwnerCanCancel`	Caller doesn’t own the order NFT	Only the NFT holder can cancel
`InvalidOrderType`	Order not in PENDING status	Check `getOrderStatus()` — only status `1` cancellable
`SignatureExpired`	Meta-tx cancel deadline passed	Re-sign with future deadline

Supported Chains

Chain	ID
Ethereum	1
HyperEVM	999
Base	8453

Getting started

Origin - Branded Stablecoins

Amplify - Stablecoin Earn

Access - Borrow

USDG0

​Contract Source

​Architecture

​Obtain Addresses — GraphQL API

​Query

​Example cURL

​Response Shape

​GraphQL Variables

​ABIs

​DistributorCodeDepositor

​WithdrawQueue

​ERC-20 (BoringVault shares + deposit tokens)

​Accountant

​FeeModule

​Teller

​Pre-Flight: Pause State Check

​Deposit Flow — Standard (Approve + Deposit)

​Deposit Parameters

​Distributor Codes

​Deposit Flow — Permit (Single Transaction)

​Permit EIP-712 Domain (varies by token)

​Slippage / minimumMint Formula

​Withdrawal Flow (Complete)

​submitOrder Parameters

​Share-to-Asset Conversion

​Withdrawal Fee Calculation

​Cancellation Flow — Direct

​Cancellation Flow — Meta-Transaction (Gasless)

​EIP-712 Cancel Signature

​REST API Endpoints

​Vault APY

​Vault TVL

​Vault Assets (simplified vault discovery)

​Withdrawal Requests

​Order Status Enum (On-Chain)

​Token Notes

​Common Revert Errors

​Supported Chains

Contract Source

Architecture

Obtain Addresses — GraphQL API

Query

Example cURL

Response Shape

GraphQL Variables

ABIs

DistributorCodeDepositor

WithdrawQueue

ERC-20 (BoringVault shares + deposit tokens)

Accountant

FeeModule

Teller

Pre-Flight: Pause State Check

Deposit Flow — Standard (Approve + Deposit)

Deposit Parameters

Distributor Codes

Deposit Flow — Permit (Single Transaction)

Permit EIP-712 Domain (varies by token)

Slippage / minimumMint Formula

Withdrawal Flow (Complete)

submitOrder Parameters

Share-to-Asset Conversion

Withdrawal Fee Calculation

Cancellation Flow — Direct

Cancellation Flow — Meta-Transaction (Gasless)

EIP-712 Cancel Signature

REST API Endpoints

Vault APY

Vault TVL

Vault Assets (simplified vault discovery)

Withdrawal Requests

Order Status Enum (On-Chain)

Token Notes

Common Revert Errors

Supported Chains