Error Handling

Handle errors from @cofhe/sdk operations using typed CofheError objects

All SDK operations return values directly and throw typed CofheError objects on failure. This replaces the Result wrapper pattern used by cofhejs.

Catching errors

import { isCofheError, CofheErrorCode, Encryptable } from '@cofhe/sdk';

try {
  const [encrypted] = await client
    .encryptInputs([Encryptable.uint32(42n)])
    .execute();
} catch (err) {
  if (isCofheError(err)) {
    console.error(err.code);    // CofheErrorCode enum value
    console.error(err.message); // human-readable description
  }
}

CofheError structure

Every CofheError has:

• code — a CofheErrorCode enum value identifying the error type
• message — a human-readable description of what went wrong

Use isCofheError(err) to check if a caught error is a CofheError.

Common error codes

Error code	When it occurs
ZkPackFailed	encryptInputs exceeded the 2048-bit plaintext limit
PermitNotFound	No permit found for the given chainId + account
PermitInvalid	The permit signature is invalid or expired
DecryptFailed	Decryption request was rejected by the Threshold Network
NotConnected	Attempted an operation before calling client.connect(...)

Error handling patterns

Encryption errors

import { isCofheError, CofheErrorCode, Encryptable } from '@cofhe/sdk';

try {
  const encrypted = await client
    .encryptInputs([Encryptable.uint128(veryLargeValue)])
    .execute();
} catch (err) {
  if (isCofheError(err) && err.code === CofheErrorCode.ZkPackFailed) {
    console.error('Input too large — split into multiple calls');
  }
}

Decryption errors

import { isCofheError, CofheErrorCode, FheTypes } from '@cofhe/sdk';

try {
  const plaintext = await client
    .decryptForView(ctHash, FheTypes.Uint32)
    .execute();
} catch (err) {
  if (isCofheError(err) && err.code === CofheErrorCode.PermitNotFound) {
    // Create a permit and retry
    await client.permits.getOrCreateSelfPermit();
    const plaintext = await client
      .decryptForView(ctHash, FheTypes.Uint32)
      .execute();
  }
}