Errors - peaq

Every error raised by the SDK extends a common base. Faucet-specific codes are surfaced on the error instance (error.code) so callers can branch without string matching.

Class hierarchy

JavaScript
Python

PeaqosError
├── ValidationError
├── RuntimeError
├── ValueCapExceeded
└── RateLimitExceeded

All four concrete classes extend PeaqosError directly. catch (err instanceof PeaqosError) covers every SDK error; catching RuntimeError alone will miss ValueCapExceeded and RateLimitExceeded.

import {
  PeaqosError,         // base
  ValidationError,     // bad input
  RuntimeError,        // chain or HTTP failure; carries optional `code`
  ValueCapExceeded,    // operational cap hit (extends PeaqosError)
  RateLimitExceeded,   // operational cap hit (extends PeaqosError)
} from "@peaqos/peaq-os-sdk";

PeaqosError
├── ValidationError
├── RpcError
├── ApiError
├── ValueCapExceeded
└── RateLimitExceeded

from peaq_os_sdk import (
    PeaqosError,
    ValidationError,
    RpcError,         # chain / web3 errors
    ApiError,         # HTTP API errors (faucet, MCR API)
    ValueCapExceeded,
    RateLimitExceeded,
)

Python separates transport-layer failures into RpcError (chain) and ApiError (faucet + MCR API). JavaScript collapses both into RuntimeError with a code field.

Faucet error codes

All 20 codes the Gas Station can return from POST /faucet/fund, POST /2fa/setup, and POST /2fa/confirm. Each endpoint returns a subset. For example, INVALID_OWNER_ADDRESS and QR_GENERATION_FAILED only come from /2fa/setup. Codes surface as RuntimeError.code (JS) or ApiError.code (Python).

2FA errors

Code	Description	Retry
`INVALID_2FA`	OTP rejected by the faucet	Yes: submit a fresh 6-digit code
`2FA_NOT_CONFIGURED`	Owner has not completed `setup_faucet_2fa`	No: re-run setup
`2FA_NOT_ACTIVE`	2FA enrolled but not confirmed	No: call `confirm_faucet_2fa` with a valid OTP
`2FA_LOCKED`	Too many invalid attempts; owner temporarily blocked	After lockout window

Idempotency errors

Code	Description	Retry
`DUPLICATE_REQUEST`	Same `request_id` already in flight	No: use a different `request_id` or wait for prior result
`REQUEST_ALREADY_PROCESSED`	Same `request_id` already resolved	No: read the prior result

Rate limit & cap errors

Code	Description	Retry
`RATE_LIMITED`	Per-IP or per-wallet throttle hit	After cooldown
`CAP_EXCEEDED_OWNER`	Daily per-owner funding cap reached	Next day
`CAP_EXCEEDED_WALLET`	Daily per-target-wallet cap reached	Next day, or target a different wallet

Validation errors

Code	Description	Retry
`INVALID_PAYLOAD`	Request body malformed	No: fix the payload
`INVALID_OWNER_ADDRESS`	`owner_address` not a recognized format	No
`INVALID_TARGET_ADDRESS`	`target_wallet_address` not recognized	No
`INVALID_CHAIN_ID`	`chain_id` not configured on the faucet	No
`INVALID_REQUEST_ID`	`request_id` not a UUID	No

Chain & server errors

Code	Description	Retry
`TRANSFER_FAILED`	On-chain transfer reverted or stalled	Yes
`CHAIN_RPC_ERROR`	Faucet’s RPC call failed	Yes
`INTERNAL_ERROR`	Faucet internal failure	Yes

QR errors

Code	Description	Retry
`QR_NOT_FOUND`	QR image expired or never created	No: re-run setup
`QR_EXPIRED`	QR retrieval attempted after ~2 min TTL	No: re-run setup
`QR_GENERATION_FAILED`	Faucet could not generate the image	Yes

Full flow reference: Gas Station concept, setupFaucet2FA, fund_from_gas_station.

On-chain revert names

Revert names the SDK translates to a friendly message and surfaces as RuntimeError.code (JS) or RpcError.code (Python). The contracts define more custom errors than this table; anything not listed surfaces as code: "TX_REVERTED" (Python) or code: "<RawErrorName>" with a generic Transaction reverted: … message (JS, when viem decodes the selector).

Revert	Raised by	Cause
`AlreadyRegistered`	`registerMachine` / `registerFor` / `register_machine`	Address already has a machine ID
`InvalidMachineAddress`	`registerFor`	`machineAddress` is the zero address
`InvalidAddress`	Staking / NFT flows	Caller passed the zero address where a real address is required
`AmountZero`	Staking / bond flow	Bond amount is zero
`AlreadyStaked`	Staking flow	Machine is already bonded/staked
`MachineNotBonded`	`mintNft` / `mint_nft`	Caller’s machine is not bonded on the IdentityRegistry
`AlreadyMinted`	`mintNft` / `mint_nft`	An NFT is already minted for the machine
`NotMachineOwner`	`mintNft` / `mint_nft`	Caller is not the owner of the machine
`RecipientMustBeMachineOwner`	`mintNft` / `mint_nft`	Operator-mint guard: recipient must be the registered machine owner
`MachineNotFound`	`submitEvent` / `tokenIdOf`	machineId has no Identity record on the IdentityRegistry
`MachineDeactivated`	`submitEvent`	The machine has been deactivated by the IdentityRegistry
`NotAuthorizedSubmitter`	`submitEvent`	Caller is not authorized to submit events for this machine
`InvalidEventType`	`submitEvent`	`eventType` is not `0` (revenue) or `1` (activity)
`InvalidTrustLevel`	`submitEvent`	`trustLevel` is not `0`, `1`, or `2`

MCR API error codes

Returned by queryMcr / query_mcr, queryMachine / query_machine, and queryOperatorMachines / query_operator_machines. Surfaced as RuntimeError.code (JS) or ApiError.code (Python).

Code	Cause	Retry
`NOT_FOUND`	The DID, machine, or token ID was not found by the MCR API (HTTP 404)	No: check the input
`BAD_RESPONSE`	The MCR returned an unexpected payload shape	No: file an issue if it persists
`HTTP_ERROR`	The MCR returned an unhandled non-2xx status	Maybe: surface the status code and decide
`SERVER_ERROR`	The MCR returned 5xx	Yes, with backoff
`SERVICE_UNAVAILABLE`	The MCR returned 503 (`Service not initialised` / `Chain unavailable`)	Yes, with backoff
`TIMEOUT`	The HTTP request exceeded `timeoutMs`	Yes
`NETWORK_ERROR`	Transport-level failure (DNS, TCP, TLS)	Yes
`ABORTED`	The caller aborted the request via `AbortSignal` (JS only)	Caller’s choice

OWS signing error codes

Raised when transaction signing routes through an OWS vault wallet (PeaqosClient.fromWallet / from_wallet with owsSigning=true). The SDK normalises the upstream OWS error code into a typed SDK exception — only INVALID_INPUT becomes ValidationError; the other four become PeaqosError (or RuntimeError in JS) with the original OWS error preserved as .cause.

Code	Cause	Surfaces as
`WALLET_NOT_FOUND`	Vault wallet name / UUID does not exist	`PeaqosError` (Py) / `RuntimeError` (JS)
`INVALID_PASSPHRASE`	Wrong vault passphrase	`PeaqosError` (Py) / `RuntimeError` (JS)
`INVALID_INPUT`	Malformed transaction or sign-hash payload	`ValidationError(field="transaction")`
`POLICY_DENIED`	Signing blocked by an OWS policy rule	`PeaqosError` (Py) / `RuntimeError` (JS)
`CHAIN_NOT_SUPPORTED`	Transaction `chainId` is not configured in OWS	`PeaqosError` (Py) / `RuntimeError` (JS)

Constants exported from both SDKs as OWS_ERROR_WALLET_NOT_FOUND, OWS_ERROR_INVALID_PASSPHRASE, OWS_ERROR_INVALID_INPUT, OWS_ERROR_POLICY_DENIED, OWS_ERROR_CHAIN_NOT_SUPPORTED. JS additionally exports the OwsSigningErrorCode union type.

import { OWS_ERROR_INVALID_PASSPHRASE, OWS_ERROR_CHAIN_NOT_SUPPORTED } from "@peaqos/peaq-os-sdk";

try {
  await client.bridgeNft({ tokenId, destination: "base" });
} catch (err) {
  if (err.cause?.code === OWS_ERROR_INVALID_PASSPHRASE) { /* prompt re-auth */ }
  if (err.cause?.code === OWS_ERROR_CHAIN_NOT_SUPPORTED) { /* OWS chain config bug */ }
  throw err;
}

from peaq_os_sdk import (
    OWS_ERROR_INVALID_PASSPHRASE,
    OWS_ERROR_CHAIN_NOT_SUPPORTED,
    PeaqosError,
)

try:
    client.bridge_nft(token_id=..., destination="base")
except PeaqosError as err:
    code = getattr(err.__cause__, "code", None)
    if code == OWS_ERROR_INVALID_PASSPHRASE:
        ...  # prompt re-auth
    if code == OWS_ERROR_CHAIN_NOT_SUPPORTED:
        ...  # OWS chain config bug
    raise

SDK transaction sentinels

Raised by the SDK’s transaction helper around any contract call. Surfaced as RuntimeError.code (JS) or RpcError.code (Python).

Code	Cause
`WALLET_NOT_CONFIGURED`	Method requires a signer but none was configured. (JS only; the Python `PeaqosClient` constructor requires a `private_key` and surfaces this as `ValidationError`.)
`TX_REVERTED`	The transaction reverted on-chain. The revert reason is in the message; revert names from the table above are decoded into `code` when the SDK recognizes them.
`RECEIPT_AWAIT_FAILED`	Transaction was submitted but the SDK could not retrieve a receipt. The tx may still have landed; re-query by hash before retrying.
`REGISTERED_EVENT_MISSING`	Receipt has no `Registered` event log. Indicates a contract/SDK ABI mismatch.
`REGISTERED_EVENT_MALFORMED`	`Registered` event log was decoded but had unexpected fields. Same root cause as above.
`INVALID_FEE_RESULT`	`quoteSend` on the LayerZero ONFT adapter returned a malformed `MessagingFee`. Raised inside `bridge_nft` (Python) before submission.

Faucet / HTTP envelope sentinels

Raised by the SDK when a faucet or MCR response is reachable but unparseable. Surfaced as ApiError.code (Python). The JS SDK collapses these into the generic RuntimeError envelope path.

Code	Cause
`INVALID_RESPONSE`	Faucet returned a non-JSON body.
`UNEXPECTED_RESPONSE`	Faucet returned JSON but the `status` / `code` / `data` envelope did not match the expected shape for the endpoint.
`NETWORK_ERROR`	Transport-level failure during a faucet call (DNS, connection refused, TLS, timeout via `requests.RequestException`). Same sentinel as the MCR API table above.

Client-side error codes

Raised by the SDK itself (not by a chain revert). Surfaced as RuntimeError.code (JS) or ValidationError/RpcError attributes (Python).

Code	Raised by	Cause
`MIN_BOND_INVALID_RESULT`	`registerMachine` / `registerFor` (JS only)	`IdentityRegistry.minBond()` returned a non-`bigint` value before submitting the bond.

Error handling patterns

JavaScript
Python

import {
  PeaqosError,
  ValidationError,
  RuntimeError,
  RateLimitExceeded,
} from "@peaqos/peaq-os-sdk";

try {
  await client.fundFromGasStation(params, faucetUrl);
} catch (err) {
  if (err instanceof ValidationError) {
    // fix caller input
  } else if (err instanceof RateLimitExceeded) {
    // back off
  } else if (err instanceof RuntimeError) {
    switch (err.code) {
      case "INVALID_2FA":
        // prompt for a fresh TOTP
        break;
      case "CAP_EXCEEDED_OWNER":
      case "CAP_EXCEEDED_WALLET":
        // surface cap messaging
        break;
      default:
        throw err;
    }
  } else {
    throw err;
  }
}

from peaq_os_sdk import PeaqosError, ValidationError, ApiError, RpcError

try:
    client.fund_from_gas_station(
        owner_address=owner,
        target_wallet_address=target,
        chain_id="peaq",
        two_factor_code=totp,
        faucet_base_url=faucet_url,
    )
except ValidationError:
    # fix caller input
    raise
except ApiError as err:
    if err.code == "INVALID_2FA":
        # prompt for a fresh TOTP
        pass
    elif err.code in ("CAP_EXCEEDED_OWNER", "CAP_EXCEEDED_WALLET"):
        # surface cap messaging
        pass
    else:
        raise
except RpcError:
    # retry with backoff
    raise

SDK Reference

Documentation Index

​Class hierarchy

​Faucet error codes

​On-chain revert names

​MCR API error codes

​OWS signing error codes

​SDK transaction sentinels

​Faucet / HTTP envelope sentinels

​Client-side error codes

​Error handling patterns

​Related