# new CoreUtils()
Provides static helper methods to read credentials and keys from disk or raw content, construct Fabric gateway Identities and Signers, and perform common filesystem operations used by the Fabric client tooling.
Core utilities for interacting with files, crypto identities, and Fabric SDK helpers
Example
// Read an identity and signer from directories
const identity = await CoreUtils.getIdentity('Org1MSP', '/msp/signcerts');
const signer = await CoreUtils.getSigner('/msp/keystore');
// Build a CA user
const user = await CoreUtils.getCAUser('appUser', pemKey, pemCert, 'Org1MSP');Methods
# async static contentOfLoadFile(contentOrPath, fileReader) → {Promise.<(string|Uint8Array|Buffer)>}
If the input is a Uint8Array or PEM content, returns it as-is; otherwise uses a provided async fileReader to load the content from disk.
Resolve file content from a path or return provided raw content
Parameters:
| Name | Type | Description |
|---|---|---|
contentOrPath |
string
|
Uint8Array
|
Either a raw content buffer/string or a filesystem path |
fileReader |
function
|
Async function to read file content when a path is provided |
The content to be used downstream
Promise.<(string|Uint8Array|Buffer)>
# async static getCAUser(userName, privateKey, certificate, mspId) → {Promise.<User>}
Constructs a fabric-common User, sets a crypto suite, imports the provided private key, and sets enrollment with certificate and MSP ID.
Create a Fabric CA User object with enrollment
Parameters:
| Name | Type | Description |
|---|---|---|
userName |
string
|
The user name for the CA user |
privateKey |
string
|
PEM-encoded private key |
certificate |
string
|
PEM-encoded X.509 certificate |
mspId |
string
|
Membership Service Provider identifier |
The enrolled Fabric User instance
Promise.<User>
# async static getIdentity(mspId, certDirectoryPath) → {Promise.<Identity>}
Reads a certificate from a directory path or accepts raw content and returns an Identity object suitable for the Fabric Gateway.
Build a Fabric Gateway Identity from an MSP ID and certificate
Parameters:
| Name | Type | Description |
|---|---|---|
mspId |
string
|
Membership Service Provider ID |
certDirectoryPath |
string
|
Path to a directory containing the certificate file, or PEM content |
The identity containing mspId and certificate credentials
Promise.<Identity>
# async static readFile(contentOrPath) → {Promise.<(string|Uint8Array|Buffer)>}
Convenience wrapper that loads a file using fs.promises when a path string is provided; otherwise returns the given Buffer directly.
Read file content from a path or return provided Buffer
Parameters:
| Name | Type | Description |
|---|---|---|
contentOrPath |
string
|
Buffer
|
Path to a file on disk or an already-loaded Buffer |
The file content as a Buffer/string depending on reader
Promise.<(string|Uint8Array|Buffer)>