diff --git a/src/constants.ts b/src/constants.ts
index 7371e32..2206b01 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -1 +1,4 @@
 export const DENOM = 'alnt';
+export const DEFAULT_CHAIN_ID = 'laconic_9000-1';
+
+export const DEFAULT_GAS_ESTIMATION_MULTIPLIER = 1.5;
diff --git a/src/index.ts b/src/index.ts
index 7a3b776..f82cc49 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -31,8 +31,7 @@ import { Coin } from './proto/cosmos/base/v1beta1/coin';
 import { MsgCancelBondResponse, MsgCreateBondResponse, MsgRefillBondResponse, MsgWithdrawBondResponse } from './proto/cerc/bond/v1/tx';
 import { MsgOnboardParticipantResponse } from './proto/cerc/onboarding/v1/tx';
 import { MsgSendResponse } from './proto/cosmos/bank/v1beta1/tx';
-
-export const DEFAULT_CHAIN_ID = 'laconic_9000-1';
+import { DEFAULT_CHAIN_ID, DEFAULT_GAS_ESTIMATION_MULTIPLIER } from './constants';
 
 /**
  * Create an auction bid.
@@ -132,7 +131,7 @@ export class Registry {
   async setRecord (
     { privateKey, record, bondId }: { privateKey: string, record: any, bondId: string },
     transactionPrivateKey: string,
-    fee: StdFee
+    fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER
   ) {
     const account = new Account(Buffer.from(transactionPrivateKey, 'hex'));
     await account.init();
@@ -147,7 +146,7 @@ export class Registry {
   /**
    * Send coins.
    */
-  async sendCoins ({ amount, denom, destinationAddress }: MessageMsgSendCoins, privateKey: string, fee: StdFee) {
+  async sendCoins ({ amount, denom, destinationAddress }: MessageMsgSendCoins, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -202,7 +201,7 @@ export class Registry {
   /**
    * Create bond.
    */
-  async createBond ({ denom, amount }: MessageMsgCreateBond, privateKey: string, fee: StdFee): Promise<MsgCreateBondResponse> {
+  async createBond ({ denom, amount }: MessageMsgCreateBond, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER): Promise<MsgCreateBondResponse> {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -218,7 +217,7 @@ export class Registry {
   /**
    * Refill bond.
    */
-  async refillBond ({ denom, amount, id }: MessageMsgRefillBond, privateKey: string, fee: StdFee): Promise<MsgRefillBondResponse> {
+  async refillBond ({ denom, amount, id }: MessageMsgRefillBond, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER): Promise<MsgRefillBondResponse> {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -235,7 +234,7 @@ export class Registry {
   /**
    * Withdraw (from) bond.
    */
-  async withdrawBond ({ denom, amount, id }: MessageMsgWithdrawBond, privateKey: string, fee: StdFee): Promise<MsgWithdrawBondResponse> {
+  async withdrawBond ({ denom, amount, id }: MessageMsgWithdrawBond, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER): Promise<MsgWithdrawBondResponse> {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -252,7 +251,7 @@ export class Registry {
   /**
    * Cancel bond.
    */
-  async cancelBond ({ id }: MessageMsgCancelBond, privateKey: string, fee: StdFee): Promise<MsgCancelBondResponse> {
+  async cancelBond ({ id }: MessageMsgCancelBond, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER): Promise<MsgCancelBondResponse> {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -267,7 +266,7 @@ export class Registry {
   /**
    * Associate record with bond.
    */
-  async associateBond ({ bondId, recordId }: MessageMsgAssociateBond, privateKey: string, fee: StdFee) {
+  async associateBond ({ bondId, recordId }: MessageMsgAssociateBond, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -283,7 +282,7 @@ export class Registry {
   /**
    * Dissociate record from bond.
    */
-  async dissociateBond ({ recordId }: MessageMsgDissociateBond, privateKey: string, fee: StdFee) {
+  async dissociateBond ({ recordId }: MessageMsgDissociateBond, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -298,7 +297,7 @@ export class Registry {
   /**
    * Dissociate all records from bond.
    */
-  async dissociateRecords ({ bondId }: MessageMsgDissociateRecords, privateKey: string, fee: StdFee) {
+  async dissociateRecords ({ bondId }: MessageMsgDissociateRecords, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -313,7 +312,7 @@ export class Registry {
   /**
    * Reassociate records (switch bond).
    */
-  async reassociateRecords ({ newBondId, oldBondId }: MessageMsgReAssociateRecords, privateKey: string, fee: StdFee) {
+  async reassociateRecords ({ newBondId, oldBondId }: MessageMsgReAssociateRecords, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -329,7 +328,7 @@ export class Registry {
   /**
    * Reserve authority.
    */
-  async reserveAuthority ({ name, owner }: { name: string, owner?: string }, privateKey: string, fee: StdFee) {
+  async reserveAuthority ({ name, owner }: { name: string, owner?: string }, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -345,7 +344,7 @@ export class Registry {
   /**
    * Set authority bond.
    */
-  async setAuthorityBond ({ bondId, name }: MessageMsgSetAuthorityBond, privateKey: string, fee: StdFee) {
+  async setAuthorityBond ({ bondId, name }: MessageMsgSetAuthorityBond, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -361,7 +360,7 @@ export class Registry {
   /**
    * Commit auction bid.
    */
-  async commitBid ({ auctionId, commitHash }: MessageMsgCommitBid, privateKey: string, fee: StdFee) {
+  async commitBid ({ auctionId, commitHash }: MessageMsgCommitBid, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -377,7 +376,7 @@ export class Registry {
   /**
    * Reveal auction bid.
    */
-  async revealBid ({ auctionId, reveal }: MessageMsgRevealBid, privateKey: string, fee: StdFee) {
+  async revealBid ({ auctionId, reveal }: MessageMsgRevealBid, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -413,7 +412,7 @@ export class Registry {
   /**
    * Set name (LRN) to record ID (CID).
    */
-  async setName ({ cid, lrn }: MessageMsgSetName, privateKey: string, fee: StdFee) {
+  async setName ({ cid, lrn }: MessageMsgSetName, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -436,7 +435,7 @@ export class Registry {
   /**
    * Delete name (LRN) mapping.
    */
-  async deleteName ({ lrn }: MessageMsgDeleteName, privateKey: string, fee: StdFee) {
+  async deleteName ({ lrn }: MessageMsgDeleteName, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER) {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -447,20 +446,10 @@ export class Registry {
     );
   }
 
-  async getLaconicClient (account: Account) {
-    return LaconicClient.connectWithSigner(
-      this._endpoints.rpc,
-      account.wallet,
-      {
-        gasPrice: this._gasPrice
-      }
-    );
-  }
-
   /**
    * Onboard participant.
   */
-  async onboardParticipant ({ ethPayload, ethSignature, role, kycId }: MessageMsgOnboardParticipant, privateKey: string, fee: StdFee): Promise<MsgOnboardParticipantResponse> {
+  async onboardParticipant ({ ethPayload, ethSignature, role, kycId }: MessageMsgOnboardParticipant, privateKey: string, fee: StdFee | number = DEFAULT_GAS_ESTIMATION_MULTIPLIER): Promise<MsgOnboardParticipantResponse> {
     const account = new Account(Buffer.from(privateKey, 'hex'));
     await account.init();
     const laconicClient = await this.getLaconicClient(account);
@@ -495,9 +484,18 @@ export class Registry {
   async getParticipantByNitroAddress (nitroAddress: string) {
     return this._client.getParticipantByNitroAddress(nitroAddress);
   }
+
+  async getLaconicClient (account: Account) {
+    return LaconicClient.connectWithSigner(
+      this._endpoints.rpc,
+      account.wallet,
+      { gasPrice: this._gasPrice }
+    );
+  }
 }
 
 export { Account };
 export { LaconicClient };
+export * from './constants';
 export * from './types/cerc/bond/message';
 export * from './types/cerc/onboarding/message';
diff --git a/src/testing/helper.ts b/src/testing/helper.ts
index 8c85652..ed8a1e5 100644
--- a/src/testing/helper.ts
+++ b/src/testing/helper.ts
@@ -2,7 +2,8 @@ import assert from 'assert';
 import yaml from 'node-yaml';
 import semver from 'semver';
 
-import { Account, DEFAULT_CHAIN_ID } from '../index';
+import { Account } from '../index';
+import { DEFAULT_CHAIN_ID } from '../constants';
 
 export const ensureUpdatedConfig = async (path: string) => {
   const conf = await yaml.read(path);