EdDSA MPC Session API

The EddsaSession class offers APIs that facilitate easy access to Multi-Party Computation (MPC) functionalities.

Import

import { EddsaSession } from '@silencelaboratories/silent-shard-sdk';

Constructors

constructor

• new EddsaSession(config): EddsaSession

Creates a new EdDSA Session

Parameters

Name	Type	Description
config	SessionConfig	The configuration for the session.

Returns

EddsaSession

Methods

export

▸ export(config): Promise<string>

Parameters

Name	Type
config	EddsaExportConfig

Returns

Promise<string>

---

finishPresign

▸ finishPresign(config): Promise<string>

Compute pre sign with the Ecdsa keyshare

Parameters

Name	Type	Description
config	EcdsaFinishPreSignConfig	The configuration for the pre sign.

Returns

Promise<string>

• Returns a promise that resolves to a computed presign.

---

import

▸ import(config): Promise<Keyshare>

Import private key into MPC (client and server) keyshares and create a new EdDSA keyshare

Parameters

Name	Type	Description
config	EddsaImportConfig	The configuration for the key import.

Returns

Promise<Keyshare>

• Returns a promise that resolves to a refreshed Keyshare object.

---

keygen

▸ keygen(): Promise<Keyshare>

Generates a new EdDSA keyshare

Returns

Promise<Keyshare>

Returns a promise that resolves to a Keyshare object.

---

preSign

▸ preSign(config): Promise<string>

Compute pre sign with the Ecdsa keyshare

Parameters

Name	Type	Description
config	EddsaPreSignConfig	The configuration for the pre sign.

Returns

Promise<string>

• Returns a promise that resolves to a computed presign.

---

recovery

▸ recovery(keysharePublicKey): Promise<Keyshare>

Recover keyshare with public key

Parameters

Name	Type	Description
keysharePublicKey	string	Public in hex format of the existing keyshare object to be recovered.

Returns

Promise<Keyshare>

• Returns a promise that resolves to a recovered Keyshare object.

---

refresh

▸ refresh(keyshare): Promise<Keyshare>

Refreshes an existing EdDSA keyshare

Parameters

Name	Type	Description
keyshare	Keyshare	The existing keyshare object to be refreshed.

Returns

Promise<Keyshare>

• Returns a promise that resolves to a refreshed Keyshare object.

---

sign

▸ sign(config): Promise<string>

Signs a message hash with the EdDSA keyshare

Parameters

Name	Type	Description
config	EddsaSignConfig	The configuration for the signing.

Returns

Promise<string>

• Returns a promise that resolves to a signature.