diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000000..dae199aecb
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+v12
diff --git a/package.json b/package.json
index a8ae37a1ac..33a75a8d11 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "@types/cors": "^2.8.7",
     "@types/debug": "^4.1.5",
     "@types/express": "^4.17.7",
-    "@types/indy-sdk": "^1.15.0",
+    "@types/indy-sdk": "^1.15.1",
     "@types/jest": "^26.0.10",
     "@types/node-fetch": "^2.5.7",
     "@types/uuid": "^8.3.0",
diff --git a/src/lib/__tests__/credentials.test.ts b/src/lib/__tests__/credentials.test.ts
index 5f5b7b7d3e..c566aca20d 100644
--- a/src/lib/__tests__/credentials.test.ts
+++ b/src/lib/__tests__/credentials.test.ts
@@ -90,12 +90,12 @@ describe('credentials', () => {
       schema: ledgerSchema,
       tag: 'TAG',
       signatureType: 'CL',
-      config: { support_revocation: false },
+      config: { supportRevocation: false },
     };
     const [ledgerCredDefId] = await registerDefinition(faberAgent, definitionTemplate);
     credDefId = ledgerCredDefId;
 
-    const publicDid = faberAgent.getPublicDid()?.did;
+    const publicDid = faberAgent.publicDid?.did;
     await ensurePublicDidIsOnLedger(faberAgent, publicDid!);
     const { agentAConnection, agentBConnection } = await makeConnection(faberAgent, aliceAgent);
     faberConnection = agentAConnection;
diff --git a/src/lib/__tests__/helpers.ts b/src/lib/__tests__/helpers.ts
index bccaf0ef38..09a8348a2f 100644
--- a/src/lib/__tests__/helpers.ts
+++ b/src/lib/__tests__/helpers.ts
@@ -154,7 +154,7 @@ export async function makeConnection(agentA: Agent, agentB: Agent) {
 }
 
 export async function registerSchema(agent: Agent, schemaTemplate: SchemaTemplate): Promise<[SchemaId, Schema]> {
-  const [schemaId] = await agent.ledger.registerCredentialSchema(schemaTemplate);
+  const [schemaId] = await agent.ledger.registerSchema(schemaTemplate);
   const ledgerSchema = await agent.ledger.getSchema(schemaId);
   logger.logJson(`created schema with id ${schemaId}`, ledgerSchema);
   return [schemaId, ledgerSchema];
diff --git a/src/lib/__tests__/ledger.test.ts b/src/lib/__tests__/ledger.test.ts
index b503e99fa7..ce5fc24277 100644
--- a/src/lib/__tests__/ledger.test.ts
+++ b/src/lib/__tests__/ledger.test.ts
@@ -35,7 +35,7 @@ describe('ledger', () => {
   });
 
   test(`initialization of agent's public DID`, async () => {
-    faberAgentPublicDid = faberAgent.getPublicDid();
+    faberAgentPublicDid = faberAgent.publicDid;
     logger.logJson('faberAgentPublicDid', faberAgentPublicDid!);
 
     expect(faberAgentPublicDid).toEqual(
@@ -48,7 +48,7 @@ describe('ledger', () => {
 
   test('get public DID from ledger', async () => {
     if (!faberAgentPublicDid) {
-      throw new Error('Agent does not have publid did.');
+      throw new Error('Agent does not have public did.');
     }
 
     const result = await faberAgent.ledger.getPublicDid(faberAgentPublicDid.did);
@@ -71,7 +71,7 @@ describe('ledger', () => {
 
   test('register schema on ledger', async () => {
     if (!faberAgentPublicDid) {
-      throw new Error('Agent does not have publid did.');
+      throw new Error('Agent does not have public did.');
     }
 
     const schemaName = `test-schema-${Date.now()}`;
@@ -81,32 +81,36 @@ describe('ledger', () => {
       version: '1.0',
     };
 
-    [schemaId] = await faberAgent.ledger.registerCredentialSchema(schemaTemplate);
+    const schemaResponse = await faberAgent.ledger.registerSchema(schemaTemplate);
+    schemaId = schemaResponse[0];
+    const schema = schemaResponse[1];
+
     const ledgerSchema = await faberAgent.ledger.getSchema(schemaId);
 
     expect(schemaId).toBe(`${faberAgentPublicDid.did}:2:${schemaName}:1.0`);
+
     expect(ledgerSchema).toEqual(
       expect.objectContaining({
-        attrNames: expect.arrayContaining(['name', 'age']),
+        attrNames: expect.arrayContaining(schemaTemplate.attributes),
         id: `${faberAgentPublicDid.did}:2:${schemaName}:1.0`,
         name: schemaName,
-        seqNo: expect.any(Number),
-        ver: '1.0',
-        version: '1.0',
+        seqNo: schema.seqNo,
+        ver: schemaTemplate.version,
+        version: schemaTemplate.version,
       })
     );
   });
 
   test('register definition on ledger', async () => {
     if (!faberAgentPublicDid) {
-      throw new Error('Agent does not have publid did.');
+      throw new Error('Agent does not have public did.');
     }
     const schema = await faberAgent.ledger.getSchema(schemaId);
     const credentialDefinitionTemplate = {
       schema: schema,
       tag: 'TAG',
       signatureType: 'CL',
-      config: { support_revocation: true },
+      config: { supportRevocation: true },
     };
 
     const [credDefId] = await faberAgent.ledger.registerCredentialDefinition(credentialDefinitionTemplate);
@@ -117,9 +121,9 @@ describe('ledger', () => {
     expect(ledgerCredDef).toEqual(
       expect.objectContaining({
         id: expect.stringMatching(credDefIdRegExp),
-        schemaId: expect.any(String),
-        type: 'CL',
-        tag: 'TAG',
+        schemaId: String(schema.seqNo),
+        type: credentialDefinitionTemplate.signatureType,
+        tag: credentialDefinitionTemplate.tag,
         ver: '1.0',
         value: expect.objectContaining({
           primary: expect.anything(),
diff --git a/src/lib/__tests__/proofs.test.ts b/src/lib/__tests__/proofs.test.ts
index 3363ee81c2..f9bdc4754a 100644
--- a/src/lib/__tests__/proofs.test.ts
+++ b/src/lib/__tests__/proofs.test.ts
@@ -96,12 +96,12 @@ describe('Present Proof', () => {
       schema: ledgerSchema,
       tag: 'TAG',
       signatureType: 'CL',
-      config: { support_revocation: false },
+      config: { supportRevocation: false },
     };
     const [ledgerCredDefId] = await registerDefinition(faberAgent, definitionTemplate);
     credDefId = ledgerCredDefId;
 
-    const publicDid = faberAgent.getPublicDid()?.did;
+    const publicDid = faberAgent.publicDid?.did;
     await ensurePublicDidIsOnLedger(faberAgent, publicDid!);
     const { agentAConnection, agentBConnection } = await makeConnection(faberAgent, aliceAgent);
 
diff --git a/src/lib/agent/Agent.ts b/src/lib/agent/Agent.ts
index 9d2dbd7744..7437cbdd4f 100644
--- a/src/lib/agent/Agent.ts
+++ b/src/lib/agent/Agent.ts
@@ -156,8 +156,8 @@ export class Agent {
     return this.inboundTransporter.start(this);
   }
 
-  public getPublicDid() {
-    return this.wallet.getPublicDid();
+  public get publicDid() {
+    return this.wallet.publicDid;
   }
 
   public getMediatorUrl() {
diff --git a/src/lib/modules/credentials/__tests__/StubWallet.ts b/src/lib/modules/credentials/__tests__/StubWallet.ts
index 09c995cadd..28052c74a8 100644
--- a/src/lib/modules/credentials/__tests__/StubWallet.ts
+++ b/src/lib/modules/credentials/__tests__/StubWallet.ts
@@ -25,13 +25,16 @@ import type {
   WalletQuery,
   LedgerRequest,
 } from 'indy-sdk';
-import { Wallet, DidInfo } from '../../../wallet/Wallet';
+import { Wallet } from '../../../wallet/Wallet';
 import { UnpackedMessageContext } from '../../../types';
 
 export class StubWallet implements Wallet {
   public get walletHandle() {
     return 0;
   }
+  public get publicDid() {
+    return undefined;
+  }
   public init(): Promise<void> {
     return Promise.resolve();
   }
@@ -59,9 +62,6 @@ export class StubWallet implements Wallet {
   public initPublicDid(didConfig: DidConfig): Promise<void> {
     throw new Error('Method not implemented.');
   }
-  public getPublicDid(): DidInfo | undefined {
-    throw new Error('Method not implemented.');
-  }
   public createDid(didConfig?: DidConfig | undefined): Promise<[string, string]> {
     throw new Error('Method not implemented.');
   }
diff --git a/src/lib/modules/ledger/LedgerModule.ts b/src/lib/modules/ledger/LedgerModule.ts
index 4c1afa016c..dff6743b31 100644
--- a/src/lib/modules/ledger/LedgerModule.ts
+++ b/src/lib/modules/ledger/LedgerModule.ts
@@ -16,18 +16,20 @@ export class LedgerModule {
   }
 
   public async registerPublicDid() {
-    // TODO: handle ping response message
+    throw new Error('registerPublicDid not implemented.');
   }
 
   public async getPublicDid(did: Did) {
     return this.ledgerService.getPublicDid(did);
   }
 
-  public async registerCredentialSchema(schema: SchemaTemplate) {
-    const did = this.wallet.getPublicDid()?.did;
+  public async registerSchema(schema: SchemaTemplate) {
+    const did = this.wallet.publicDid?.did;
+
     if (!did) {
       throw new Error('Agent has no public DID.');
     }
+
     return this.ledgerService.registerSchema(did, schema);
   }
 
@@ -36,10 +38,12 @@ export class LedgerModule {
   }
 
   public async registerCredentialDefinition(credentialDefinitionTemplate: CredDefTemplate) {
-    const did = this.wallet.getPublicDid()?.did;
+    const did = this.wallet.publicDid?.did;
+
     if (!did) {
       throw new Error('Agent has no public DID.');
     }
+
     return this.ledgerService.registerCredentialDefinition(did, credentialDefinitionTemplate);
   }
 
diff --git a/src/lib/modules/ledger/LedgerService.ts b/src/lib/modules/ledger/LedgerService.ts
index 53d2a53cbf..88d46ac40e 100644
--- a/src/lib/modules/ledger/LedgerService.ts
+++ b/src/lib/modules/ledger/LedgerService.ts
@@ -7,7 +7,7 @@ import { Wallet } from '../../wallet/Wallet';
 export class LedgerService {
   private wallet: Wallet;
   private indy: typeof Indy;
-  private poolHandle?: PoolHandle;
+  private _poolHandle?: PoolHandle;
   private authorAgreement?: AuthorAgreement | null;
 
   public constructor(wallet: Wallet, indy: typeof Indy) {
@@ -15,6 +15,14 @@ export class LedgerService {
     this.indy = indy;
   }
 
+  private get poolHandle() {
+    if (!this._poolHandle) {
+      throw new Error('Pool has not been initialized yet.');
+    }
+
+    return this._poolHandle;
+  }
+
   public async connect(poolName: string, poolConfig: PoolConfig) {
     try {
       logger.log(`Creating pool config with name "${poolName}".`);
@@ -31,13 +39,10 @@ export class LedgerService {
     await this.indy.setProtocolVersion(2);
 
     logger.log('Opening pool');
-    this.poolHandle = await this.indy.openPoolLedger(poolName);
+    this._poolHandle = await this.indy.openPoolLedger(poolName);
   }
 
   public async getPublicDid(did: Did) {
-    if (!this.poolHandle) {
-      throw new Error('Pool has not been initialized.');
-    }
     const request = await this.indy.buildGetNymRequest(null, did);
     logger.log('request', request);
 
@@ -51,9 +56,6 @@ export class LedgerService {
   }
 
   public async registerSchema(did: Did, schemaTemplate: SchemaTemplate): Promise<[SchemaId, Schema]> {
-    if (!this.poolHandle) {
-      throw new Error('Pool has not been initialized.');
-    }
     const { name, attributes, version } = schemaTemplate;
     const [schemaId, schema] = await this.indy.issuerCreateSchema(did, name, version, attributes);
     logger.log(`Register schema with ID = ${schemaId}:`, schema);
@@ -67,13 +69,15 @@ export class LedgerService {
     const response = await this.indy.submitRequest(this.poolHandle, signedRequest);
     logger.log('Register schema response', response);
 
+    const seqNo = response.result.txnMetadata?.seqNo;
+
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+    schema.seqNo = seqNo!;
+
     return [schemaId, schema];
   }
 
   public async getCredentialSchema(schemaId: SchemaId) {
-    if (!this.poolHandle) {
-      throw new Error('Pool has not been initialized.');
-    }
     const request = await this.indy.buildGetSchemaRequest(null, schemaId);
     logger.log('Get schema request', request);
 
@@ -90,12 +94,11 @@ export class LedgerService {
     did: Did,
     credentialDefinitionTemplate: CredDefTemplate
   ): Promise<[CredDefId, CredDef]> {
-    if (!this.poolHandle) {
-      throw new Error('Pool has not been initialized.');
-    }
     const { schema, tag, signatureType, config } = credentialDefinitionTemplate;
 
-    const [credDefId, credDef] = await this.wallet.createCredentialDefinition(did, schema, tag, signatureType, config);
+    const [credDefId, credDef] = await this.wallet.createCredentialDefinition(did, schema, tag, signatureType, {
+      support_revocation: config.supportRevocation,
+    });
     logger.log(`Register credential definition with ID = ${credDefId}:`, credDef);
 
     const request = await this.indy.buildCredDefRequest(did, credDef);
@@ -111,9 +114,6 @@ export class LedgerService {
   }
 
   public async getCredentialDefinition(credDefId: CredDefId) {
-    if (!this.poolHandle) {
-      throw new Error('Pool has not been initialized.');
-    }
     const request = await this.indy.buildGetCredDefRequest(null, credDefId);
     logger.log('Get credential definition request:', request);
 
@@ -154,10 +154,6 @@ export class LedgerService {
       return this.authorAgreement;
     }
 
-    if (!this.poolHandle) {
-      throw new Error('Pool has not been initialized.');
-    }
-
     const taaRequest = await this.indy.buildGetTxnAuthorAgreementRequest(null);
     const taaResponse = await this.indy.submitRequest(this.poolHandle, taaRequest);
     const acceptanceMechanismRequest = await this.indy.buildGetAcceptanceMechanismsRequest(null);
@@ -195,7 +191,7 @@ export interface CredDefTemplate {
   schema: Schema;
   tag: string;
   signatureType: string;
-  config: { support_revocation: boolean };
+  config: { supportRevocation: boolean };
 }
 
 interface AuthorAgreement {
diff --git a/src/lib/wallet/IndyWallet.ts b/src/lib/wallet/IndyWallet.ts
index abf37bff09..1dd7b2809a 100644
--- a/src/lib/wallet/IndyWallet.ts
+++ b/src/lib/wallet/IndyWallet.ts
@@ -50,6 +50,10 @@ export class IndyWallet implements Wallet {
     this.indy = indy;
   }
 
+  public get publicDid() {
+    return this.publicDidInfo;
+  }
+
   private get walletHandle() {
     if (!this._walletHandle) {
       throw new Error('Wallet has not been initialized yet');
@@ -107,10 +111,6 @@ export class IndyWallet implements Wallet {
     };
   }
 
-  public getPublicDid() {
-    return this.publicDidInfo;
-  }
-
   public async createDid(didConfig?: DidConfig): Promise<[Did, Verkey]> {
     return this.indy.createAndStoreMyDid(this.walletHandle, didConfig || {});
   }
diff --git a/src/lib/wallet/Wallet.test.ts b/src/lib/wallet/Wallet.test.ts
index f0e594e894..c5bf0007db 100644
--- a/src/lib/wallet/Wallet.test.ts
+++ b/src/lib/wallet/Wallet.test.ts
@@ -9,7 +9,7 @@ describe('Wallet', () => {
 
     await wallet.initPublicDid({ seed: '00000000000000000000000Forward01' });
 
-    expect(wallet.getPublicDid()).toEqual({
+    expect(wallet.publicDid).toEqual({
       did: 'DtWRdd6C5dN5vpcN6XRAvu',
       verkey: '82RBSn3heLgXzZd74UsMC8Q8YRfEEhQoAM7LUqE6bevJ',
     });
diff --git a/src/lib/wallet/Wallet.ts b/src/lib/wallet/Wallet.ts
index 5a4437fb4c..5f20210f75 100644
--- a/src/lib/wallet/Wallet.ts
+++ b/src/lib/wallet/Wallet.ts
@@ -30,11 +30,12 @@ import type {
 import { UnpackedMessageContext } from '../types';
 
 export interface Wallet {
+  publicDid: DidInfo | undefined;
+
   init(): Promise<void>;
   close(): Promise<void>;
   delete(): Promise<void>;
   initPublicDid(didConfig: DidConfig): Promise<void>;
-  getPublicDid(): DidInfo | undefined;
   createDid(didConfig?: DidConfig): Promise<[Did, Verkey]>;
   createCredentialDefinition(
     issuerDid: Did,
diff --git a/src/samples/mediator.ts b/src/samples/mediator.ts
index d1a4d2a820..0f15914fa7 100644
--- a/src/samples/mediator.ts
+++ b/src/samples/mediator.ts
@@ -71,7 +71,7 @@ const messageReceiver = new HttpInboundTransporter(app);
 const agent = new Agent(config, messageReceiver, messageSender, indy, messageRepository);
 
 app.get('/', async (req, res) => {
-  const agentDid = agent.getPublicDid();
+  const agentDid = agent.publicDid;
   res.send(agentDid);
 });
 
diff --git a/yarn.lock b/yarn.lock
index 5b2eaedde5..fe1e84f80b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -601,10 +601,10 @@
   dependencies:
     "@types/node" "*"
 
-"@types/indy-sdk@^1.15.0":
-  version "1.15.0"
-  resolved "https://registry.yarnpkg.com/@types/indy-sdk/-/indy-sdk-1.15.0.tgz#44b49978fc8c4892f2c90ec580d3c957b9a88805"
-  integrity sha512-xkxmHpxiCnw28URfP6xWtB93KAarfKPRDA3U1dv9ejkw4rLAXPeWkmnDmvmtoY2/QLCyq20hqP/ZEAV188okiw==
+"@types/indy-sdk@^1.15.1":
+  version "1.15.1"
+  resolved "https://registry.yarnpkg.com/@types/indy-sdk/-/indy-sdk-1.15.1.tgz#7baf9eab749ddac643126d8553ce5295ba256952"
+  integrity sha512-H8ZvxwpR0L+I9Was0Mcx4POmC5DCVaMMAVM7feEX1u7DFdMNoK7jWruP0sT8IT/UaeQ+ie3dArYis72i4wuVTg==
   dependencies:
     "@types/node" "*"