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The Amplify SDK provides functions for initializing the SDK, fetching data, and preparing transactions for deposits and withdrawals.

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Initialization

initAmplifySDK

Initialize the SDK with your API key before using any other functions.

fetchSupportedAssets

Fetch supported tokens and vault configurations for a yield type.

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Deposits

Deposit Workflow

The unified deposit API with prepareDepositAuthorization and prepareDeposit.

prepareDepositTxData

Prepare transaction data for a standard deposit after approval.

prepareDepositWithPermitTxData

Prepare transaction data for a permit-based deposit (single transaction).

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Withdrawals

prepareWithdrawalAuthorization

Check approval requirements and prepare withdrawal authorization.

prepareWithdrawal

Prepare transaction data through the unified withdrawal wrapper.

prepareWithdrawOrderTxData

Build low-level WithdrawQueue order transaction data.

prepareApproveWithdrawOrderTxData

Build low-level approval transaction data for vault shares.

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Display Helpers

Display Helpers

UI helper functions for showing vault APY, TVL, fees, share calculations, and withdrawal history.

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Function Quick Reference

FunctionDescription
initAmplifySDKInitialize SDK with API key and options
fetchSupportedAssetsGet supported tokens for a yield type
prepareDepositAuthorizationDetermine optimal authorization method
prepareDepositPrepare deposit with auto-detected method
prepareDepositTxDataPrepare standard deposit transaction
prepareDepositWithPermitTxDataPrepare permit-based deposit transaction
prepareWithdrawalAuthorizationDetermine if withdrawal approval is required
prepareWithdrawalPrepare withdrawal execution transaction
prepareWithdrawOrderTxDataPrepare low-level WithdrawQueue submission
prepareApproveWithdrawOrderTxDataPrepare low-level withdraw approval transaction
findVaultByConfigDiscover vault address by asset, yield type, and chain
getMinimumMintCalculate expected vault shares for a deposit
getVaultAPYFetch latest vault APY
getVaultTVLFetch vault total value locked
getWithdrawalFeeCalculate withdrawal fees
getWithdrawalRequestsFetch user’s withdrawal requests
getMinimumWithdrawalOrderSizeGet minimum withdrawal order size

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Type Guards

The SDK exports type guards for handling discriminated union results: 
import {
  prepareWithdrawalAuthorization,
  isPermitAuth,
  isApprovalAuth,
  isAlreadyApprovedAuth,
  isWithdrawApprovalAuth,
  isWithdrawAlreadyApprovedAuth,
} from "@paxoslabs/amplify-sdk";

const auth = await prepareDepositAuthorization(params);

if (isPermitAuth(auth)) {
  // auth.permitData is available
} else if (isApprovalAuth(auth)) {
  // auth.txData is available
} else if (isAlreadyApprovedAuth(auth)) {
  // auth.allowance is available
}

const withdrawAuth = await prepareWithdrawalAuthorization({
  // ...
});
if (isWithdrawApprovalAuth(withdrawAuth)) {
  // withdrawAuth.txData is available
} else if (isWithdrawAlreadyApprovedAuth(withdrawAuth)) {
  // withdrawAuth.allowance is available
}
See DepositAuthMethod for full type documentation.