Class: CCIPDestSimulationUnavailableError

Defined in: errors/specialized.ts:3836

Thrown when the destination pool's releaseOrMint simulation could not be performed at all, so executability is undetermined (neither proven nor disproven). It is distinct from CCIPDestExecutionRevertError, which means the call did revert and the message would not execute. The reason (also in context.reason) tells why the check could not run:

• 'transport': the eth_call failed with an RPC/transport error rather than a contract revert. Transient (isTransient === true) — retry, optionally against a different destination RPC.
• 'attestation-required': the destination pool consumes offchain token data (a CCTP attestation or bridge proof — e.g. USDC/CCTP v1, Lombard v1 pools) that only exists after the message is sent, so the check is fundamentally unavailable pre-send. Not transient — retrying pre-send can never succeed; the check becomes possible post-send (e.g. manual-exec --estimate-gas-limit, where the real attestation is supplied).

Example

TypeScript

try {
  await estimateReceiveExecution({ source, dest, routerOrRamp, message })
} catch (error) {
  if (error instanceof CCIPDestSimulationUnavailableError && error.isTransient) {
    // retry, optionally with a different dest RPC
  }
}

Extends

• CCIPError

Constructors

Constructor

new CCIPDestSimulationUnavailableError(reason: "attestation-required" | "transport", options?: CCIPErrorOptions): CCIPDestSimulationUnavailableError

Defined in: errors/specialized.ts:3847

Creates a destination-simulation-unavailable error.

Parameters

Parameter	Type	Description
reason	"attestation-required" | "transport"	'transport' for RPC/transport failures (transient), 'attestation-required' for pools whose releaseOrMint needs offchain token data that doesn't exist pre-send (not transient).
options?	CCIPErrorOptions	Optional error options; pass the underlying RPC error as cause.

Returns

CCIPDestSimulationUnavailableError

Overrides

CCIPError.constructor

Properties

_isCCIPError

readonly _isCCIPError: true

Defined in: errors/CCIPError.ts:30

Brand for cross-module identification (dual package hazard).

Inherited from

CCIPError._isCCIPError

---

code

readonly code: CCIPErrorCode

Defined in: errors/CCIPError.ts:32

Machine-readable error code.

Inherited from

CCIPError.code

---

context

readonly context: Record<string, unknown>

Defined in: errors/CCIPError.ts:34

Structured context (IDs, addresses).

Inherited from

CCIPError.context

---

isTransient

readonly isTransient: boolean

Defined in: errors/CCIPError.ts:36

True if retry may succeed.

Inherited from

CCIPError.isTransient

---

name

readonly name: "CCIPDestSimulationUnavailableError" = 'CCIPDestSimulationUnavailableError'

Defined in: errors/specialized.ts:3837

Overrides

CCIPError.name

---

reason

readonly reason: "attestation-required" | "transport"

Defined in: errors/specialized.ts:3839

Why the simulation could not be performed.

---

recovery?

readonly optional recovery?: string

Defined in: errors/CCIPError.ts:40

Recovery suggestion.

Inherited from

CCIPError.recovery

---

retryAfterMs?

readonly optional retryAfterMs?: number

Defined in: errors/CCIPError.ts:38

Retry delay in ms.

Inherited from

CCIPError.retryAfterMs

Methods

toJSON()

toJSON(): Record<string, unknown>

Defined in: errors/CCIPError.ts:105

Serializes the error for logging.

Use this instead of JSON.stringify(error) directly, as Error properties are non-enumerable and would be lost.

Returns

Record<string, unknown>

An object containing all error properties

Inherited from

CCIPError.toJSON

---

from()

static from(error: unknown, code?: CCIPErrorCode): CCIPError

Defined in: errors/CCIPError.ts:89

Wraps an unknown caught value in a CCIPError.

Useful for normalizing errors in catch blocks.

Parameters

Parameter	Type	Description
error	unknown	The error to wrap
code?	CCIPErrorCode	Optional error code (defaults to 'UNKNOWN')

Returns

CCIPError

A CCIPError wrapping the original error

Inherited from

CCIPError.from

---

isCCIPError()

static isCCIPError(error: unknown): error is CCIPError

Defined in: errors/CCIPError.ts:73

Type guard for CCIPError.

Prefer this over instanceof to handle the dual package hazard when multiple versions of the SDK may be present.

Parameters

Parameter	Type	Description
error	unknown	The error to check

Returns

error is CCIPError

True if the error is a CCIPError instance

Inherited from

CCIPError.isCCIPError