Last updated 2024-07-01

Kadena client

The @kadena/client library provides a TypeScript-based API for interacting with smart contracts and Chainweb nodes on the Kadena network. The library includes modules to help you perform the following types of common tasks:

Create commands
Sign transactions
Submit transactions
Query transaction results

If you only need to interact with the coin contract, you can use the functions in the @kadena/client-utils/coin library instead of the @kadena/client library for a simpler API.

Get started with Kadena client

One of the most important features of the Kadena client library is that helps you create command objects with the correct structure. You can then construct and sign transactions to send the command to the blockchain network. After you submit a transaction for processing, you can use the Kadena client to listen for the transaction results.

The following example illustrates the structure of a command object:

typescript

interface ICommand {  cmd: string; // stringified command of <IPactCommand> type  hash: string; // cmd-hash  sigs: Array<{ sig: string } | undefined>; // array of signatures} interface IPactCommand {  payload:    | {        exec: {          code: string;          data: Record<string, unknown>;        };      }    | {        cont: {          pactId: string;          step: number;          rollback: boolean;          data?: Record<string, unknown>;          proof?: string | null;        };      };  meta: {    chainId: ChainId; // "0" to  "19"    sender: string;    gasLimit: number;    gasPrice: number;    ttl: number;    creationTime: number;  };  signers: Array<{    pubKey: string;    address?: string;    scheme?: SignerScheme;    clist?: ICap[];  }>;  verifiers?: Array<{    name: string;    proof: PactValue;    clist?: ICap[];  }>;  networkId: string;  nonce: string;}

typescript

interface ICommand {  cmd: string; // stringified command of <IPactCommand> type  hash: string; // cmd-hash  sigs: Array<{ sig: string } | undefined>; // array of signatures} interface IPactCommand {  payload:    | {        exec: {          code: string;          data: Record<string, unknown>;        };      }    | {        cont: {          pactId: string;          step: number;          rollback: boolean;          data?: Record<string, unknown>;          proof?: string | null;        };      };  meta: {    chainId: ChainId; // "0" to  "19"    sender: string;    gasLimit: number;    gasPrice: number;    ttl: number;    creationTime: number;  };  signers: Array<{    pubKey: string;    address?: string;    scheme?: SignerScheme;    clist?: ICap[];  }>;  verifiers?: Array<{    name: string;    proof: PactValue;    clist?: ICap[];  }>;  networkId: string;  nonce: string;}

If your use case is simple enough that you can create the JSON directly, you don't need to use the functions in the Kadena client library. You can also use some parts of the library, without using everything. If you prefer to learn from code, check out the client-examples.

Install

You can download and install the @kadena/client library with the following command:

bash

npm install @kadena/client

bash

npm install @kadena/client

Import

After you install the library, you can import @kadena/client functions into a TypeScript or JavaScript program with the following statement:

typescript

import { createClient, Pact } from '@kadena/client';

typescript

import { createClient, Pact } from '@kadena/client';

The library also exports functional programming utilities under @kadena/client/fp for more flexibility when using a functional programming approach. To import functional programming utilities, include the following statement in your TypeScript or JavaScript program.

typescript

import { composePactCommand } from '@kadena/client/fp';

typescript

import { composePactCommand } from '@kadena/client/fp';

Calling Pact modules

Interacting with the Kadena blockchain network and Chainweb nodes is mostly a matter of calling smart contract functions. From the client perspective, you need to write Pact code in a string and pass it to the IPactCommand.payload.exec.code interface. Without code completion and validation, writing the Pact code string manually is error-prone and vulnerable to code injection.

To simplify the process, you can use Pact.modules to help you:

Write type-safe functions.
Perform Pact type conversion.
Avoid code injection.

You can skip this part of the client library if your code is just a simple constant string.

Basic usage

Use Pact.modules with the following format:

typescript

import { Pact } from `@kadena/client`; Pact.modules[`${namespace}.${moduleName}`][functionName](...args);

typescript

import { Pact } from `@kadena/client`; Pact.modules[`${namespace}.${moduleName}`][functionName](...args);

Parameters

Parameter	Type	Description
...args	PactValue[]	List of arguments.

typescript

// the pseudo code of PactValue typetype PactValue =  | string  | number  | boolean  | Date  | { int: string }  | { decimal: string }  | PactValue[]  | Record<string, PactValue>;

typescript

// the pseudo code of PactValue typetype PactValue =  | string  | number  | boolean  | Date  | { int: string }  | { decimal: string }  | PactValue[]  | Record<string, PactValue>;

Examples

To create the code for the coin.transfer function:

typescript

import { Pact } from `@kadena/client`; const code = Pact.modules.coin.transfer("alice", "bob", { decimal: '1.1' });// code === '(coin.transfer "alice" "bob" 1.1)'

typescript

import { Pact } from `@kadena/client`; const code = Pact.modules.coin.transfer("alice", "bob", { decimal: '1.1' });// code === '(coin.transfer "alice" "bob" 1.1)'

To create the code for the free.my-module.my-function function that converts a list, objects, and date to valid Pact code:

typescript

import { Pact } from `@kadena/client`; const code = Pact.modules["free.my-module"].["my-function"](["first", { time: new Date() }]);// code === '(free.my-module.my-function ["first" {"time" : (time "2023-07-20T14:55:11Z")} ])'

typescript

import { Pact } from `@kadena/client`; const code = Pact.modules["free.my-module"].["my-function"](["first", { time: new Date() }]);// code === '(free.my-module.my-function ["first" {"time" : (time "2023-07-20T14:55:11Z")} ])'

Create type definitions

You can use @kadena/pactjs-cli to create the type definitions for the Pact module you use. After you generate the type definitions file, the code editor in your development environment should provide code completion for functions and capabilities.

To create a type definition file for the coin contract:

bash

npx @kadena/pactjs-cli contract-generate --contract coin --api https://api.testnet.chainweb.com/chainweb/0.0/testnet04/chain/0/pact;

bash

npx @kadena/pactjs-cli contract-generate --contract coin --api https://api.testnet.chainweb.com/chainweb/0.0/testnet04/chain/0/pact;

Creating commands

As illustrated in Get started with Kadena client, a command is a JSON object with three keys: cmd, hash, and sig. There are two types of commands:

Execution commands
Continuation commands

You can create the JSON object without using the Kadena client library. However, using the library and Pact.builder to create the command object simplifies the process.

Pact.builder.execution

You can use Pact.builder to create an execution command object, IPactCommand.payload.exec.code. Most transactions are execution (exec) commands that complete in a single step. Execution commands are also be used for the first step in transactions that are defpact multi-step transactions.

typescript

Pact.builder.execution(...codes): IBuilder

typescript

Pact.builder.execution(...codes): IBuilder

Parameter	Type	Description
...codes	string[]	List of input for a function.

Examples

To use strings for the command code:

typescript

const builder: IBuilder = Pact.builder.execution(  `(coin.transfer "alice" "bob" 1.1)`,);

typescript

const builder: IBuilder = Pact.builder.execution(  `(coin.transfer "alice" "bob" 1.1)`,);

To use Pact.modules for the command code:

typescript

const builder: IBuilder = Pact.builder.execution(  Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' }),);

typescript

const builder: IBuilder = Pact.builder.execution(  Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' }),);

Pact.builder.continuation

You can use Pact.builder to create a continuation command object, IPactCommand.payload.cont, which is the type of transaction used for additional steps of defpact multi-step transactions.

typescript

Pact.builder.continuation(contData): IBuilder

typescript

Pact.builder.continuation(contData): IBuilder

Parameter	Type	Description
contData	object	Continuation data includes a unique `defpact` identifier, whether the transactions rolls back a previous transaction, the transaction step that the continuation represents with the first step being step 0, and a simple payment verification proof if one is generated by calling the `/spv` endpoint.

The contData object consists of the following properties:

json

{    pactId: string,    rollback: boolean,    step: number,    data?: Record<string, any>,    proof?: null \| string}

json

{    pactId: string,    rollback: boolean,    step: number,    data?: Record<string, any>,    proof?: null \| string}

Example

The coin.cross-chain function is a defpact multi-step transaction that burns tokens in the source chain and mints tokens in the destination chain. After the first step completes successfully, you can call the second step by using the continuation command object.

typescript

const builder: IBuilder = Pact.builder.continuation({  pactId,  rollback: false,  step: 1,  proof: spvProof,});

typescript

const builder: IBuilder = Pact.builder.continuation({  pactId,  rollback: false,  step: 1,  proof: spvProof,});

addSigner

You can use the addSigner method to add public keys and capabilities for a transaction signer to the command. You can call addSigner multiple times to add multiple signers to the transaction. Later, the Chainweb node checks whether all required signers have signed the transaction or not.

typescript

Pact.builder.execution(...codes).addSigner(signerOrSignersList, capabilityCallback): IBuilder

typescript

Pact.builder.execution(...codes).addSigner(signerOrSignersList, capabilityCallback): IBuilder

Parameter	Type	Description
signer	string or object	{ pubKey: string; scheme?: 'ED25519'
capabilityCallback	(signFor) => ReturnType[]	Allows you to scope what the signer is signing for to a specific list of capabilities.

Chainweb supports the following signature schemes for public keys:

ED25519
WebAuthn
ETH

The default signature scheme is ED25519. You can pass just the public key if the signature scheme is ED25519. If the scheme is not ED25519, you must pass a signer object that includes the pubic key and the signature scheme.

Examples

To add a signer public key for a coin contract transfer:

typescript

// ED25519 keyconst alicePublicKey =  'e7f4da07b1d200f6e45aa6492afed6819297a97563859a5f0df9c54f5abd4aab'; Pact.builder  .execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' }))  .addSigner(alicePublicKey, (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]);

typescript

// ED25519 keyconst alicePublicKey =  'e7f4da07b1d200f6e45aa6492afed6819297a97563859a5f0df9c54f5abd4aab'; Pact.builder  .execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' }))  .addSigner(alicePublicKey, (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]);

To add a signer that uses the WebAuthn scheme:

typescript

Pact.builder  .execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' }))  .addSigner({ pubKey: webAuthnPublicKey, scheme: 'WebAuthn' }, (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]);

typescript

Pact.builder  .execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' }))  .addSigner({ pubKey: webAuthnPublicKey, scheme: 'WebAuthn' }, (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]);

To add a list of signers with no capabilities:

typescript

Pact.builder  .execution('(free.my-module.my-function)')  .addSigner([    'ED25519_publicKey',    { pubKey: 'WebAuthn_publicKey', scheme: 'WebAuthn' },  ]);

typescript

Pact.builder  .execution('(free.my-module.my-function)')  .addSigner([    'ED25519_publicKey',    { pubKey: 'WebAuthn_publicKey', scheme: 'WebAuthn' },  ]);

To add a list of signers with similar capabilities:

typescript

Pact.builder  .execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' }))  // e.g., Alice's account is guarded by two keys  .addSigner(['first_publicKey', 'second_publicKey'], (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]); const equivalentPactCommand = {  payload: {    exec: {      code: '(coin.transfer "alice" "bob" 1.1 )',      data: {},    },  },  signers: [    {      pubKey: 'first_publicKey',      scheme: 'ED25519',      clist: [        { name: 'coin.TRANSFER', args: ['alice', 'bob', { decimal: '1.1' }] },      ],    },    {      pubKey: 'second_publicKey',      scheme: 'ED25519',      clist: [        { name: 'coin.TRANSFER', args: ['alice', 'bob', { decimal: '1.1' }] },      ],    },  ],};

typescript

Pact.builder  .execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' }))  // e.g., Alice's account is guarded by two keys  .addSigner(['first_publicKey', 'second_publicKey'], (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]); const equivalentPactCommand = {  payload: {    exec: {      code: '(coin.transfer "alice" "bob" 1.1 )',      data: {},    },  },  signers: [    {      pubKey: 'first_publicKey',      scheme: 'ED25519',      clist: [        { name: 'coin.TRANSFER', args: ['alice', 'bob', { decimal: '1.1' }] },      ],    },    {      pubKey: 'second_publicKey',      scheme: 'ED25519',      clist: [        { name: 'coin.TRANSFER', args: ['alice', 'bob', { decimal: '1.1' }] },      ],    },  ],};

addData

You can use addData to add data to the IPactCommand.payload.exec.data or IPactCommand.payload.cont.data command. This data is readable in the smart contract later. You can also use this data in the code you set in the command.

typescript

Pact.builder  .execution(...codes)  .addData(key, value): IBuilder

typescript

Pact.builder  .execution(...codes)  .addData(key, value): IBuilder

Parameter	Type	Description
key	string	The key associated with the data you're sending.
value	PactValue	Data that you want to send.

Examples

To transfer with parameters in data:

typescript

Pact.builder  .execution('(coin.transfer (read-string "sender") (read-string "receiver") 1.1)')  .addData("sender", sender)  .addData("receiver", sender): IBuilder

typescript

Pact.builder  .execution('(coin.transfer (read-string "sender") (read-string "receiver") 1.1)')  .addData("sender", sender)  .addData("receiver", sender): IBuilder

To use transfer-create and send the receiver guard:

typescript

Pact.builder  .execution(    '(coin.transfer-create "alice" "bob" (read-keyset "bob-guard") 1.1)',  )  .addData('bob-guard', {    keys: ['bob-public-key'],    pred: 'keys-all',  });

typescript

Pact.builder  .execution(    '(coin.transfer-create "alice" "bob" (read-keyset "bob-guard") 1.1)',  )  .addData('bob-guard', {    keys: ['bob-public-key'],    pred: 'keys-all',  });

addKeyset

Because keysets are often included as data in commands, you can use the addKeyset method as an alternative to the addData method to add a keyset to a command.

typescript

Pact.builder  .execution(...codes)  .addKeyset(name, pred, ...keys): IBuilder

typescript

Pact.builder  .execution(...codes)  .addKeyset(name, pred, ...keys): IBuilder

Parameter	Type	Description
name	string	The name associated with the keyset.
pred	"keys-all"	"keys-2"
...keys	...string[]	List of public keys in the keyset.

Examples

To use readKeyset and addKeyset helper functions with transfer-create:

typescript

Pact.builder  .execution(    Pact.modules.coin['transfer-create'](      'alice',      'bob',      readKeyset('bob-guard'),      { decimal: '1.1' },    ),  )  .addKeyset('bob-guard', 'keys-all', 'bob-public-key');

typescript

Pact.builder  .execution(    Pact.modules.coin['transfer-create'](      'alice',      'bob',      readKeyset('bob-guard'),      { decimal: '1.1' },    ),  )  .addKeyset('bob-guard', 'keys-all', 'bob-public-key');

To use transfer-create as string code:

typescript

Pact.builder  .execution(    '(coin.transfer-create "alice" "bob" (readKeyset "bob-guard") 1.1)',  )  .addKeyset('bob-guard', 'keys-all', 'bob-public-key');

typescript

Pact.builder  .execution(    '(coin.transfer-create "alice" "bob" (readKeyset "bob-guard") 1.1)',  )  .addKeyset('bob-guard', 'keys-all', 'bob-public-key');

setMeta

You can use setMeta to add metadata to a command.

typescript

Pact.builder  .execution(...codes)  .setMeta(meta): IBuilder

typescript

Pact.builder  .execution(...codes)  .setMeta(meta): IBuilder

Parameter	Type	Description
meta	{ chainId: ChainId, senderAccount: string, gasLimit: number, gasPrice: number, ttl: number, creationTime: number }	Add a metadata object to the command.

The meta object consists of the following properties:

Property	Type	Default value	Description
chainId	`"0"` to `"19"`	`undefined`	Chain identifier for the chain. Valid values are from 0 to 19.
senderAccount	`string`	`undefined`	The account address that you want to pay transaction fees from.
gasLimit	`number`	`2500`	Maximum units of gas that you want to allow to be deducted when running the transaction.
gasPrice	`number`	`1.0e-8`	Price of each gas unit based on KDA (e.g., 0.0000001).
ttl	`number`	`28800`	Time-to-live (ttl) for the transaction to be valid in seconds. The default value is 8 hours.
creationTime	`number`	`Date.now() / 1000`	Transaction creation time in seconds.

Examples

typescript

Pact.builder  .execution('(coin.transfer "alice" "bob" 1.1)')  // "bob is paying gas fee"  .setMeta({ chainId: "02", senderAccount: "bob" }): IBuilder;

typescript

Pact.builder  .execution('(coin.transfer "alice" "bob" 1.1)')  // "bob is paying gas fee"  .setMeta({ chainId: "02", senderAccount: "bob" }): IBuilder;

setNonce

You can use setNonce function to set IPactCommand.nonce to a custom nonce for the transaction. Otherwise, the nonce is set using the kjs:${timestamp} function.

typescript

Pact.builder.execution(code).setNonce(nonce): IBuilder

typescript

Pact.builder.execution(code).setNonce(nonce): IBuilder

Parameter	Type	Description
nonce	string	Custom nonce for the transaction.

Examples

typescript

Pact.builder  .execution('(coin.transfer "alice" "bob" 1.1)')  // "bob is paying gas fee"  .setNonce("a-custom-nonce"): IBuilder;

typescript

Pact.builder  .execution('(coin.transfer "alice" "bob" 1.1)')  // "bob is paying gas fee"  .setNonce("a-custom-nonce"): IBuilder;

setNetworkId

You can use setNetworkId to set IPactCommand.network to specify the network for the transaction.

typescript

Pact.builder.execution(code).setNetworkId(networkId): IBuilder

typescript

Pact.builder.execution(code).setNetworkId(networkId): IBuilder

Parameter	Type	Description
networkId	string	Network identifier, for example, "mainnet01" or "testnet04".

Examples

typescript

Pact.builder  .execution('(coin.transfer "alice" "bob" 1.1)')  // "bob is paying gas fee"  .setNetworkId("testnet04"): IBuilder;

typescript

Pact.builder  .execution('(coin.transfer "alice" "bob" 1.1)')  // "bob is paying gas fee"  .setNetworkId("testnet04"): IBuilder;

Creating transactions

After you set all parts of the command, you can create the transaction object by calling the createTransaction method. This method adds all of the default values to the command, converts cmd to a string, and adds the hash. You must add signatures to the transaction object using a wallet to submit the transaction to the blockchain. For information about adding signatures from a wallet, see Signing transactions.

typescript

const transaction: IUnsignedCommand = Pact.builder  .execution(code)  .createTransaction(); // : { cmd:"stringified-command" , hash:"command-hash" , sig: [] };

typescript

const transaction: IUnsignedCommand = Pact.builder  .execution(code)  .createTransaction(); // : { cmd:"stringified-command" , hash:"command-hash" , sig: [] };

Examples

typescript

const transaction = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0', senderAccount })  .setNetworkId(NETWORK_ID)  .createTransaction(); const output = {  cmd: '{"payload":{"exec":{"code":"(coin.transfer \\"k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46\\" \\"k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11\\" 1.0)","data":{}}},"nonce":"kjs:nonce:1711376792115","signers":[{"pubKey":"dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","scheme":"ED25519","clist":[{"name":"coin.GAS","args":[]},{"name":"coin.TRANSFER","args":["k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11",{"decimal":"1"}]}]}],"meta":{"gasLimit":2500,"gasPrice":1e-8,"sender":"k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","ttl":28800,"creationTime":1711376792,"chainId":"0"},"networkId":"testnet04"}',  hash: 'xYePm_YgO6-T9yIlCZWzOt2s4CkZcQwqWx9Iu5tVSLI',  sigs: [undefined],};

typescript

const transaction = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0', senderAccount })  .setNetworkId(NETWORK_ID)  .createTransaction(); const output = {  cmd: '{"payload":{"exec":{"code":"(coin.transfer \\"k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46\\" \\"k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11\\" 1.0)","data":{}}},"nonce":"kjs:nonce:1711376792115","signers":[{"pubKey":"dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","scheme":"ED25519","clist":[{"name":"coin.GAS","args":[]},{"name":"coin.TRANSFER","args":["k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11",{"decimal":"1"}]}]}],"meta":{"gasLimit":2500,"gasPrice":1e-8,"sender":"k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","ttl":28800,"creationTime":1711376792,"chainId":"0"},"networkId":"testnet04"}',  hash: 'xYePm_YgO6-T9yIlCZWzOt2s4CkZcQwqWx9Iu5tVSLI',  sigs: [undefined],};

getCommand

If you prefer to have the non-stringified version of the command, you can use getCommand.

typescript

const transaction: IPactCommand = Pact.builder.execution(code).getCommand();

typescript

const transaction: IPactCommand = Pact.builder.execution(code).getCommand();

Examples

typescript

const command = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0', senderAccount })  .setNetworkId(NETWORK_ID)  .getCommand(); const output = {  payload: {    exec: {      code: '(coin.transfer "k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46" "k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11" 1.0)',      data: {},    },  },  nonce: 'kjs:nonce:1711448853909',  signers: [    {      pubKey:        'dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',      scheme: 'ED25519',      clist: [        { name: 'coin.GAS', args: [] },        {          name: 'coin.TRANSFER',          args: [            'k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',            'k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11',            { decimal: '1' },          ],        },      ],    },  ],  meta: {    gasLimit: 2500,    gasPrice: 1e-8,    sender:      'k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',    ttl: 28800,    creationTime: 1711448853,    chainId: '0',  },  networkId: 'testnet04',};

typescript

const command = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0', senderAccount })  .setNetworkId(NETWORK_ID)  .getCommand(); const output = {  payload: {    exec: {      code: '(coin.transfer "k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46" "k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11" 1.0)',      data: {},    },  },  nonce: 'kjs:nonce:1711448853909',  signers: [    {      pubKey:        'dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',      scheme: 'ED25519',      clist: [        { name: 'coin.GAS', args: [] },        {          name: 'coin.TRANSFER',          args: [            'k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',            'k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11',            { decimal: '1' },          ],        },      ],    },  ],  meta: {    gasLimit: 2500,    gasPrice: 1e-8,    sender:      'k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',    ttl: 28800,    creationTime: 1711448853,    chainId: '0',  },  networkId: 'testnet04',};

initialPactCommand

If you find yourself repeating certain parts of methods for different commands, you can create your own command builder by using the createTransactionBuilder function. This function allows you to set all of the default values once and then reuse them in createTransaction.

Parameter	Type	Description
initial	Partial	The initial Pact command values that you want to reuse.

typescript

const builder: ITransactionBuilder =  createTransactionBuilder(initialPactCommand);

typescript

const builder: ITransactionBuilder =  createTransactionBuilder(initialPactCommand);

Examples

To create a transaction builder with network and chain already set:

typescript

// Pre-configure the builderexport const txBuilder = createTransactionBuilder({ networkId: "mainnet01", meta: { chainId: "1" } }); // Then somewhere in the code const command = txBuilder    .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))    .addSigner(senderKey, (signFor) => [      signFor('coin.GAS'),      signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),    ])    .setMeta({ senderAccount }) const output = const output = {  payload: {    exec: {      code: '(coin.transfer "k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46" "k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11" 1.0)',      data: {},    },  },  nonce: 'kjs:nonce:1711448853909',  signers: [    {      pubKey:        'dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',      scheme: 'ED25519',      clist: [        { name: 'coin.GAS', args: [] },        {          name: 'coin.TRANSFER',          args: [            'k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',            'k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11',            { decimal: '1' },          ],        },      ],    },  ],  meta: {    gasLimit: 2500,    gasPrice: 1e-8,    sender:      'k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',    ttl: 28800,    creationTime: 1711448853,    // Default value    chainId: '1',  },  // Default value  networkId: 'mainnet01',};

typescript

// Pre-configure the builderexport const txBuilder = createTransactionBuilder({ networkId: "mainnet01", meta: { chainId: "1" } }); // Then somewhere in the code const command = txBuilder    .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))    .addSigner(senderKey, (signFor) => [      signFor('coin.GAS'),      signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),    ])    .setMeta({ senderAccount }) const output = const output = {  payload: {    exec: {      code: '(coin.transfer "k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46" "k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11" 1.0)',      data: {},    },  },  nonce: 'kjs:nonce:1711448853909',  signers: [    {      pubKey:        'dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',      scheme: 'ED25519',      clist: [        { name: 'coin.GAS', args: [] },        {          name: 'coin.TRANSFER',          args: [            'k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',            'k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11',            { decimal: '1' },          ],        },      ],    },  ],  meta: {    gasLimit: 2500,    gasPrice: 1e-8,    sender:      'k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46',    ttl: 28800,    creationTime: 1711448853,    // Default value    chainId: '1',  },  // Default value  networkId: 'mainnet01',};

Signing transactions

After creating the command, you need to sign it using the appropriate private keys. The signing process is usually managed with a wallet. Kadena has two protocols for signing transactions, each serving different purposes:

Sign API: This API allows users to send their sign requests to the wallet. The wallet is then responsible for creating and signing the transaction simultaneously. With this approach, the wallet has more freedom, making it more suitable for simple transactions.
Quicksign: This API is designed to give dApps full control over the command, with the wallet only responsible for adding signatures. This is the recommended method if you are using the command builder from this library.

Wallets typically have their own API for communicating with applications. You can use the API provided by the wallet, or, depending on the wallet, use one of the wallet-specific wrapper functions for convenience.

Sign function interface

The sign function can be used two ways: If you pass a single transaction to the function, it returns the single signed (or partially signed) transaction. If you pass a list of transactions to the function, it returns the list of signed (or partially signed) transactions.

typescript

interface ISignFunction {  (transaction: IUnsignedCommand): Promise<ICommand | IUnsignedCommand>;  (    transactionList: IUnsignedCommand[],  ): Promise<Array<ICommand | IUnsignedCommand>>;}

typescript

interface ISignFunction {  (transaction: IUnsignedCommand): Promise<ICommand | IUnsignedCommand>;  (    transactionList: IUnsignedCommand[],  ): Promise<Array<ICommand | IUnsignedCommand>>;}

Single transaction

Parameter	Type	Description
tx	IUnsignedCommand	The transaction to be signed.

List of transactions

Parameter	Type	Description
tsList	IUnsignedCommand[]	List of the transactions to be signed.

Chainweaver

You can use createSignWithChainweaver to sign a transaction using Chainweaver. It's a factory function that returns the actual sign function.

This function uses the quicksign protocol.

typescript

createSignWithChainweaver(options:{ host?: string }): ISignFunction

typescript

createSignWithChainweaver(options:{ host?: string }): ISignFunction

Parameter	Type	Description
option	{ host?: string }	option including host URL default `{ host: 'http://127.0.0.1:9467' }`

Examples

To sign one transaction using Chainweaver:

typescript

const signWithChainweaver = createSignWithChainweaver(); const transaction = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0', senderAccount })  .setNetworkId(NETWORK_ID)  .createTransaction(); const signedTx = signWithChainweaver(transaction);

typescript

const signWithChainweaver = createSignWithChainweaver(); const transaction = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0', senderAccount })  .setNetworkId(NETWORK_ID)  .createTransaction(); const signedTx = signWithChainweaver(transaction);

To sign two transactions using Chainweaver:

typescript

const signWithChainweaver = createSignWithChainweaver(); const [txOneSigned, txTwoSigned] = signWithChainweaver([txOne, txTwo]);

typescript

const signWithChainweaver = createSignWithChainweaver(); const [txOneSigned, txTwoSigned] = signWithChainweaver([txOne, txTwo]);

WalletConnect

The WalletConnect protocol and helper functions are based on KIP-017. You must use the WalletConnect protocol to create a walletConnect client and session before you can use the helper functions to sign transactions.

Wallet Connect sign method

The createWalletConnectSign function returns the sign function using the sign protocol.

The return object might contain different data than what you would pass from the transaction builder because the sign protocol lets the wallet create the transaction.

typescript

createWalletConnectSign(client, session, walletConnectChainId): (transaction: IUnsignedCommand): Promise<ICommand | IUnsignedCommand>

typescript

createWalletConnectSign(client, session, walletConnectChainId): (transaction: IUnsignedCommand): Promise<ICommand | IUnsignedCommand>

Parameter	Type	Description
client	Client	The `wallet-connect` client object.
session	SessionTypes.Struct	The wallet-connect session object.
networkId	string	The network identifier, for example, `mainnet01` or `testnet04`. The identifier can include the `kadena:` prefix, for example, `kadena:mainnet01`.

Examples

typescript

const signWithWalletConnect = createWalletConnectSign(  client,  session,  'mainnet01',); const signedTx = signWithWalletConnect(tx);

typescript

const signWithWalletConnect = createWalletConnectSign(  client,  session,  'mainnet01',); const signedTx = signWithWalletConnect(tx);

Wallet Connect quicksign method

The createWalletConnectQuicksign function returns the sign function using thequicksign protocol.

typescript

createWalletConnectQuicksign(client, session, walletConnectChainId): ISignFunction

typescript

createWalletConnectQuicksign(client, session, walletConnectChainId): ISignFunction

Parameter	Type	Description
client	Client	The `wallet-connect` client object.
session	SessionTypes.Struct	The wallet-connect session object.
networkId	string	The network identifier, for example, `mainnet01` or `testnet04`. The identifier can include the `kadena:` prefix, for example, `kadena:mainnet01`.

Examples

typescript

const quicksignWithWalletConnect = createWalletConnectQuicksign(  client,  session,  'mainnet01',); const signedTx = quicksignWithWalletConnect(tx);

typescript

const quicksignWithWalletConnect = createWalletConnectQuicksign(  client,  session,  'mainnet01',); const signedTx = quicksignWithWalletConnect(tx);

EckoWallet

The following functions provide the sign and quicksign protocols for EckoWallet to return a sign function and other properties:

typescript

const { isInstalled, isConnected, connect } = createEckoWalletSign();const { isInstalled, isConnected, connect } = createEckoWalletQuicksign();

typescript

const { isInstalled, isConnected, connect } = createEckoWalletSign();const { isInstalled, isConnected, connect } = createEckoWalletQuicksign();

isInstalled

You can use isInstalled to check if the EckoWallet extension is installed in the browser.

typescript

isInstalled(): boolean

typescript

isInstalled(): boolean

isConnected

You can use isConnected to check if the application is already connected to EckoWallet.

typescript

isConnected(): Promise<boolean>

typescript

isConnected(): Promise<boolean>

connect

You can use connect to send a connection request to EckoWallet.

typescript

connect(networkId: string): Promise<boolean>

typescript

connect(networkId: string): Promise<boolean>

createEckoWalletSign

The createEckoWalletSign function uses the sign protocol to communicate with EckoWallet. The return object might contain different data than what you would pass from the transaction builder because the sign protocol lets the wallet create the transaction.

typescript

createEckoWalletSign(options:{ host?: string }): (transaction: IUnsignedCommand): Promise<ICommand | IUnsignedCommand>

typescript

createEckoWalletSign(options:{ host?: string }): (transaction: IUnsignedCommand): Promise<ICommand | IUnsignedCommand>

Examples

To sign a transaction using EckoWallet:

typescript

const signWithEckoWallet = createEckoWalletSign(); // the wallet will create the completed oneconst partialTx = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0' })  .setNetworkId(NETWORK_ID)  .createTransaction(); const signedTx = signWithEckoWallet(partialTx);

typescript

const signWithEckoWallet = createEckoWalletSign(); // the wallet will create the completed oneconst partialTx = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0' })  .setNetworkId(NETWORK_ID)  .createTransaction(); const signedTx = signWithEckoWallet(partialTx);

createEckoWalletQuicksign

The createEckoWalletQuicksign function uses the quicksign protocol to communicate with EckoWallet.

typescript

createEckoWalletQuicksign(options:{ host?: string }): ISignFunction

typescript

createEckoWalletQuicksign(options:{ host?: string }): ISignFunction

Examples

To sign one transaction using the quicksign protocol and EckoWallet:

typescript

const quicksignWithEckoWallet = createEckoWalletQuicksign(); const tx = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0', senderAccount })  .setNetworkId(NETWORK_ID)  .createTransaction(); const signedTx = quicksignWithEckoWallet(partialTx);

typescript

const quicksignWithEckoWallet = createEckoWalletQuicksign(); const tx = Pact.builder  .execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount))  .addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ])  .setMeta({ chainId: '0', senderAccount })  .setNetworkId(NETWORK_ID)  .createTransaction(); const signedTx = quicksignWithEckoWallet(partialTx);

To sign two transactions using the quicksign protocol and EckoWallet:

typescript

const quicksignWithEckoWallet = createEckoWalletQuicksign(); const [txOneSigned, txTwoSigned] = quicksignWithEckoWallet([txOne, txTwo]);

typescript

const quicksignWithEckoWallet = createEckoWalletQuicksign(); const [txOneSigned, txTwoSigned] = quicksignWithEckoWallet([txOne, txTwo]);

Sign with a public and secret key pair

If you have a secret key in a safe environment—for example, a server environment or CI test pipeline—you can sign transactions with the createSignWithKeypair function to returns the sign function.

The IKeyPair interface is defined as followis:

typescript

interface IKeyPair {  publicKey: string;  secretKey: string;}

typescript

interface IKeyPair {  publicKey: string;  secretKey: string;}

typescript

createSignWithKeypair(keyOrKeys:IKeyPair | IKeyPair[]): ISignFunction

typescript

createSignWithKeypair(keyOrKeys:IKeyPair | IKeyPair[]): ISignFunction

Examples

To sign with one key pair:

typescript

const signWithKeypair = createSignWithKeypair({ publicKey, secretKey }); const signedTx = signWithKeypair(tx);

typescript

const signWithKeypair = createSignWithKeypair({ publicKey, secretKey }); const signedTx = signWithKeypair(tx);

To sign with several key pairs:

typescript

const signWithKeypair = createSignWithKeypair([firstKeyPair, secondKeyPair]); const signedTx = signWithKeypair(tx);

typescript

const signWithKeypair = createSignWithKeypair([firstKeyPair, secondKeyPair]); const signedTx = signWithKeypair(tx);

addSignatures

If you already have the signature for a transaction, you can use the addSignatures function to add the signature to the transaction.

All signatures you add should either include a public key, or none of them should. If the signatures don't include the public keys, then the number of signatures must match the number of signers, and the signatures are matched based on their order.

typescript

addSignatures(transaction, ...signatures): IUnsignedCommand | ICommand

typescript

addSignatures(transaction, ...signatures): IUnsignedCommand | ICommand

Parameter	Type	Description
transaction	IUnsignedCommand	The partially signed or unsigned transaction.
...signatures	Array<{ sig: string; pubKey: string }>	Array<{ sig: string }>

Examples

To add a signature manually with a public key:

typescript

const signedTx = addSignatures(partiallySignedTx, {  sig: 'signature-str',  pubKey: 'publicKey',});

typescript

const signedTx = addSignatures(partiallySignedTx, {  sig: 'signature-str',  pubKey: 'publicKey',});

To add a signature based on the signer order:

typescript

const signedTx = addSignatures(  twoSignersTx,  { sigOne: 'signature-str' },  { sigTwo: 'signature-str' },);

typescript

const signedTx = addSignatures(  twoSignersTx,  { sigOne: 'signature-str' },  { sigTwo: 'signature-str' },);

Communicating with the network

Kadena exposes endpoints for communicating with Chainweb nodes through the [Pact REST API}(https://api.chainweb.com/openapi/pact.html). You can use any REST client to call these endpoints. However, the Kadena client library also provides functions to make these call more convenient for frontend frameworks.

createClient

To use the helper functions for communicating with Chainweb nodes, you must first use the createClient function to return the IClient interface.

typescript

createClient(  host?: string | (options: {chainId: ChainId; networkId: string}) => string,  options?: { confirmationDepth?: number }): IClient interface IClient {  getStatus: (transactionDescriptors: ITransactionDescriptor[] | ITransactionDescriptor) => Promise<IPollResponse>;  submit: {    (transaction: ICommand): Promise<ITransactionDescriptor>;    (transactionList: ICommand[]): Promise<ITransactionDescriptor[]>;  }  send: {    (transaction: ICommand): Promise<ITransactionDescriptor>;    (transactionList: ICommand[]): Promise<ITransactionDescriptor[]>;  }  submitOne: (transaction: ICommand) => Promise<ITransactionDescriptor>;  listen: (transactionDescriptor: ITransactionDescriptor) => Promise<ICommandResult>;  pollOne: (transactionDescriptor: ITransactionDescriptor) => Promise<ICommandResult>;  pollStatus: (transactionDescriptors: ITransactionDescriptor[] | ITransactionDescriptor, options?: IPollOptions) => IPollRequestPromise<ICommandResult>;  getPoll: (transactionDescriptors: ITransactionDescriptor[] | ITransactionDescriptor) => Promise<IPollResponse>;  local: <T extends ILocalOptions>(transaction: LocalRequestBody, options?: T) => Promise<LocalResponse<T>>;  dirtyRead: (transaction: IUnsignedCommand) => Promise<ICommandResult>;  preflight: (transaction: ICommand | IUnsignedCommand) => Promise<ILocalCommandResult>;  signatureVerification: (transaction: ICommand) => Promise<ICommandResult>;  runPact: (code: string, data: Record<string, unknown>, option: INetworkOptions) => Promise<ICommandResult>;  createSpv: (transactionDescriptor: ITransactionDescriptor, targetChainId: ChainId) => Promise<string>;  pollCreateSpv: (transactionDescriptor: ITransactionDescriptor, targetChainId: ChainId, options?: IPollOptions) => Promise<string>;}

typescript

createClient(  host?: string | (options: {chainId: ChainId; networkId: string}) => string,  options?: { confirmationDepth?: number }): IClient interface IClient {  getStatus: (transactionDescriptors: ITransactionDescriptor[] | ITransactionDescriptor) => Promise<IPollResponse>;  submit: {    (transaction: ICommand): Promise<ITransactionDescriptor>;    (transactionList: ICommand[]): Promise<ITransactionDescriptor[]>;  }  send: {    (transaction: ICommand): Promise<ITransactionDescriptor>;    (transactionList: ICommand[]): Promise<ITransactionDescriptor[]>;  }  submitOne: (transaction: ICommand) => Promise<ITransactionDescriptor>;  listen: (transactionDescriptor: ITransactionDescriptor) => Promise<ICommandResult>;  pollOne: (transactionDescriptor: ITransactionDescriptor) => Promise<ICommandResult>;  pollStatus: (transactionDescriptors: ITransactionDescriptor[] | ITransactionDescriptor, options?: IPollOptions) => IPollRequestPromise<ICommandResult>;  getPoll: (transactionDescriptors: ITransactionDescriptor[] | ITransactionDescriptor) => Promise<IPollResponse>;  local: <T extends ILocalOptions>(transaction: LocalRequestBody, options?: T) => Promise<LocalResponse<T>>;  dirtyRead: (transaction: IUnsignedCommand) => Promise<ICommandResult>;  preflight: (transaction: ICommand | IUnsignedCommand) => Promise<ILocalCommandResult>;  signatureVerification: (transaction: ICommand) => Promise<ICommandResult>;  runPact: (code: string, data: Record<string, unknown>, option: INetworkOptions) => Promise<ICommandResult>;  createSpv: (transactionDescriptor: ITransactionDescriptor, targetChainId: ChainId) => Promise<string>;  pollCreateSpv: (transactionDescriptor: ITransactionDescriptor, targetChainId: ChainId, options?: IPollOptions) => Promise<string>;}

You can use object destructuring to extract specific functions.

typescript

const { submit, local, pollCreateSpv } = createClient();

typescript

const { submit, local, pollCreateSpv } = createClient();

Parameter	Type	Description
host	string	(options: {chainId: ChainId; networkId: string}) => string
options	{ confirmationDepth?: number }	Additional options for the client. It has only one property now: `confirmationDepth`, which can be used in the poll endpoint. Default value is `0`.

Both host and options are optional. The default value of host is a function that returns the Chainweb node URLs for mainnet and testnet. If you want to use different URLs, you must specify the host parameter.

The networkId and chainId parameters are read from the command object and passed to the URL generator function.

Examples

To create a client for the development network and a specific chain identifier (1):

typescript

const client = createClient(  'http://127.0.0.1:8080/chainweb/0.0/development/chain/1/pact',);

typescript

const client = createClient(  'http://127.0.0.1:8080/chainweb/0.0/development/chain/1/pact',);

To create a client for the development network that covers multi-chain and uses the URL generator function for more flexibility:

typescript

const devNetClient = createClient(  ({ chainId, networkId }) =>    `http://127.0.0.1:8080/chainweb/0.0/${networkId}/chain/${chainId ?? '1'}/pact`,);

typescript

const devNetClient = createClient(  ({ chainId, networkId }) =>    `http://127.0.0.1:8080/chainweb/0.0/${networkId}/chain/${chainId ?? '1'}/pact`,);

To create a client that uses mainnet but not Kadena main network nodes:

typescript

const client = createClient(({ chainId, networkId }) => {  switch (networkId) {    case 'mainnet01':      return `http://my-node-url/chainweb/0.0/${networkId}/chain/{${chainId}}/pact`;    case 'testnet04':      return `http://my-test-node-url/chainweb/0.0/${networkId}/chain/{${chainId}}/pact`;    default:      throw new Error('UNKNOWN_NETWORK');  }});

typescript

const client = createClient(({ chainId, networkId }) => {  switch (networkId) {    case 'mainnet01':      return `http://my-node-url/chainweb/0.0/${networkId}/chain/{${chainId}}/pact`;    case 'testnet04':      return `http://my-test-node-url/chainweb/0.0/${networkId}/chain/{${chainId}}/pact`;    default:      throw new Error('UNKNOWN_NETWORK');  }});

To create a client with a confirmationDepth of 5 that waits for five new blocks to be added to the chain before reading the result of a transaction:

typescript

const { submit, pollStatus } = createClient(undefined, {  confirmationDepth: 5,});

typescript

const { submit, pollStatus } = createClient(undefined, {  confirmationDepth: 5,});

Submitting transactions

You can use the submit or submitOne functions to submit data to the blockchain. These functions use the Pact /send endpoint.

The client send function is a deprecated alias for the submit function with the same interface. To submit one transaction using the submit function:

typescript

const { submit } = createClient(); submit(tx): Promise<ITransactionDescriptor>; interface ITransactionDescriptor {  networkId: string;  chainId: ChainId;  requestKey: string}

typescript

const { submit } = createClient(); submit(tx): Promise<ITransactionDescriptor>; interface ITransactionDescriptor {  networkId: string;  chainId: ChainId;  requestKey: string}

Parameter	Type	Description
tx	ICommand	The command object ready to submit.

To submit a list of transactions using the submit function:

typescript

const { submit } = createClient(); submit(txList): Promise<ITransactionDescriptor[]>;

typescript

const { submit } = createClient(); submit(txList): Promise<ITransactionDescriptor[]>;

Parameter	Type	Description
txList	ICommand[]	List of command objects ready to submit.

In most cases, you should store the result of this function so you can fetch the result of the request.

The submitOne function is the same as submitting one transaction using the submit function. For example:

typescript

const { submitOne } = createClient(); submitOne(tx): Promise<ITransactionDescriptor>;

typescript

const { submitOne } = createClient(); submitOne(tx): Promise<ITransactionDescriptor>;

Parameter	Type	Description
tx	ICommand	The command object ready to submit.

Getting transaction results

After you submit a transaction, you need to query for the result using a request key. You can query transaction results by calling the /listen or /poll endpoint.

The /listen endpoint is a blocking request. It only accepts one request key and returns the results when the transaction result is ready. If you use this endpoint, the HTTP request remains open for a while.
The/poll endpoint accepts a list of request keys and responds immediately with the current status of the request key.

The Kadena client library exposes the following functions to use the /listen or /poll endpoint in different scenarios:

getStatus
pollStatus
listen
pollOne

These functions all return the result of a transaction with the following ICommandResult interface:

typescript

interface ICommandResult {  reqKey: string;  txId: number | null;  result:    | {        status: 'success';        data: PactValue;      }    | {        status: 'failure';        error: object;      };  gas: number;  logs: string | null;  // for defpact functions  continuation: null | {    pactId: PactTransactionHash;    step: Step;    stepCount: number;    executed: boolean | null;    stepHasRollback: boolean;    continuation: {      def: string;      args: PactValue;    };    yield: {      data: Array<[string, PactValue]>;      provenance: {        targetChainId: ChainId;        moduleHash: string;      } | null;    };  };  metaData: null | {    blockHash: string;    blockTime: number;    blockHeight: number;    prevBlockHash: string;    publicMeta?: IPactCommand['meta'];  };  events: Array<{    name: string;    module: {      name: string;      namespace: string | null;    };    params: Array<PactValue>;    moduleHash: string;  }>;}

typescript

interface ICommandResult {  reqKey: string;  txId: number | null;  result:    | {        status: 'success';        data: PactValue;      }    | {        status: 'failure';        error: object;      };  gas: number;  logs: string | null;  // for defpact functions  continuation: null | {    pactId: PactTransactionHash;    step: Step;    stepCount: number;    executed: boolean | null;    stepHasRollback: boolean;    continuation: {      def: string;      args: PactValue;    };    yield: {      data: Array<[string, PactValue]>;      provenance: {        targetChainId: ChainId;        moduleHash: string;      } | null;    };  };  metaData: null | {    blockHash: string;    blockTime: number;    blockHeight: number;    prevBlockHash: string;    publicMeta?: IPactCommand['meta'];  };  events: Array<{    name: string;    module: {      name: string;      namespace: string | null;    };    params: Array<PactValue>;    moduleHash: string;  }>;}

getStatus

This function calls /poll and returns the result of requests.

typescript

const { getStatus } = createClient(); getStatus(transactionDescriptor: TransactionDescriptor[] | ITransactionDescriptor): Promise<{    [requestKey: IBase64Url]: { [requestKey:string] ICommandResult};}>

typescript

const { getStatus } = createClient(); getStatus(transactionDescriptor: TransactionDescriptor[] | ITransactionDescriptor): Promise<{    [requestKey: IBase64Url]: { [requestKey:string] ICommandResult};}>

Parameter	Type	Description
transactionDescriptor	TransactionDescriptor[list]	One or more request keys to be queried

pollStatus

This function calls /poll in intervals and returns the result of all requests when all are ready.

typescript

const { pollStatus } = createClient(); pollStatus(  transactionDescriptor: TransactionDescriptor[] | ITransactionDescriptor,  pollOptions: {    onPoll?: (id: string) => void;    timeout?: Milliseconds;    interval?: Milliseconds;    confirmationDepth?: number;  }): IPollRequestPromise<{    [requestKey: IBase64Url]: { [requestKey:string] ICommandResult};}> interface IPollRequestPromise extends Promise {  [requestKey: IBase64Url]: Promise<ICommandResult>}

typescript

const { pollStatus } = createClient(); pollStatus(  transactionDescriptor: TransactionDescriptor[] | ITransactionDescriptor,  pollOptions: {    onPoll?: (id: string) => void;    timeout?: Milliseconds;    interval?: Milliseconds;    confirmationDepth?: number;  }): IPollRequestPromise<{    [requestKey: IBase64Url]: { [requestKey:string] ICommandResult};}> interface IPollRequestPromise extends Promise {  [requestKey: IBase64Url]: Promise<ICommandResult>}

Parameter	Type	Description
transactionDescriptor	TransactionDescriptor[list]	One or more request keys to be queried.
pollOptions	object	Optional poll configuration settings.
onPoll	string	Identifier for the callback that is called each time the node is polled for the status of a request key. This callback might be called several times if the request is not ready yet.
timeout	time	Specifies a timeout in milliseconds to stop polling if the result is not ready. The default is `180000` milliseconds (3 minutes).
interval	time	Specifies the delay between retry attempts. The default is `5000` milliseconds (5 seconds).
confirmationDepth	number	Sets the confirmationDepth for getting the response. This setting overrides the one you set in the `createClient` function.

Return value

The return value is a special type of promise that enables you to listen for each individual request through the requests property. Alternatively, you can await the result without using the requests property to handle most use cases.

Examples

Poll the status of a request:

typescript

const result = await pollStatus(request, {});

typescript

const result = await pollStatus(request, {});

Poll the status of several requests and get the result for each one immediately:

typescript

const resultPromise = pollStatus([firstRequest, secondRequest, thirdRequest]);// Notify the UI from the result of each request as soon as it's availableresultPromise.requests['first-request-key'].then((res) => {  UI.notify(res);});resultPromise.requests['second-request-key'].then((res) => {  UI.notify(res);});resultPromise.requests['third-request-key'].then((res) => {  UI.notify(res);});// The final result objectconst finalResult = await resultPromise;

typescript

const resultPromise = pollStatus([firstRequest, secondRequest, thirdRequest]);// Notify the UI from the result of each request as soon as it's availableresultPromise.requests['first-request-key'].then((res) => {  UI.notify(res);});resultPromise.requests['second-request-key'].then((res) => {  UI.notify(res);});resultPromise.requests['third-request-key'].then((res) => {  UI.notify(res);});// The final result objectconst finalResult = await resultPromise;

listen

listen is another function for fetching the result of one request. It uses the /listen endpoint, which is a blocking endpoint. Note: If your network or firewall configuration doesn't allow keeping HTTP connections open for a long time, then it's better to use pollOne which has the same interface but uses /poll under the hood.

typescript

const { listen } = createClient(); listen(transactionDescriptor: TransactionDescriptor[] | ITransactionDescriptor): Promise<ICommandResult>

typescript

const { listen } = createClient(); listen(transactionDescriptor: TransactionDescriptor[] | ITransactionDescriptor): Promise<ICommandResult>

Parameter	Type	Description
transactionDescriptor	TransactionDescriptor	The request object including `requestKey`, `networkId`, and `chainId`.

pollOne

The pollOne function fetches the result of only one request using the /poll endpoint.

typescript

const { pollOne } = createClient(); pollOne(transactionDescriptor: TransactionDescriptor[] | ITransactionDescriptor): Promise<ICommandResult>

typescript

const { pollOne } = createClient(); pollOne(transactionDescriptor: TransactionDescriptor[] | ITransactionDescriptor): Promise<ICommandResult>

Parameter	Type	Description
transactionDescriptor	TransactionDescriptor	The request object including `requestKey`, `networkId`, and `chainId`.

Reading data

Apart from transactions, you can also send read requests to the node. This mainly utilizes the /local endpoint. These kinds of requests return the result immediately since you don't need to submit data. You can also use these functions to validate your transaction before calling the /send endpoint to avoid transaction failure, as in some scenarios you need to pay gas even for failed transactions.

The following functions all use the /local endpoint:

local
dirtyRead
preflight
signatureVerification
runPact

local

The local function is the most generic function that utilizes the /local endpoint.

typescript

local(  transaction: ICommand | IUnsignedCommand,  options?: { preflight?: boolean; signatureVerification?: boolean; }): Promise<ICommandResult & { preflightWarnings?: string[] }>;

typescript

local(  transaction: ICommand | IUnsignedCommand,  options?: { preflight?: boolean; signatureVerification?: boolean; }): Promise<ICommandResult & { preflightWarnings?: string[] }>;

The return type is ICommandResult with preflightWarnings when it is set to true.

Parameter	Type	Description
transaction	ICommand or IUnsignedCommand	The signed or unsigned command object.
options	object	Optional configuration settings.
preflight	boolean	Runs the code in the `preflight` mode to simulate submitting the transaction. You can also use this option to preview the estimated gas that the transaction would consume. The default is `true`.
signatureVerification	boolean	Runs the signature verification in the node for the transaction. The default is `true`.

Examples

Use a local call to avoid submitting an incorrect transaction:

typescript

// Check if the transaction and signatures are correctconst response = await client.local(signedTx); if (response.result.status === 'failure') {  // Throw if the transaction fails to avoid paying gas for a failed transaction  throw response.result.error;}const request = await client.submit(signedTx);

typescript

// Check if the transaction and signatures are correctconst response = await client.local(signedTx); if (response.result.status === 'failure') {  // Throw if the transaction fails to avoid paying gas for a failed transaction  throw response.result.error;}const request = await client.submit(signedTx);

Use local call for gas estimation:

typescript

// We don't need to send signatures to check gas estimation;const response = await client.local(unsignedTx, {  preflight: true,  signatureVerification: false,}); if (response.result.status === 'failure') {  throw response.result.error;} const gasEstimation = response.gas;

typescript

// We don't need to send signatures to check gas estimation;const response = await client.local(unsignedTx, {  preflight: true,  signatureVerification: false,}); if (response.result.status === 'failure') {  throw response.result.error;} const gasEstimation = response.gas;

dirtyRead

Alias for local where both preflight and signatureVerification are false. This function is useful when your code only needs to read data from the node.

typescript

dirtyRead(transaction: ICommand | IUnsignedCommand): Promise<ICommandResult>;

typescript

dirtyRead(transaction: ICommand | IUnsignedCommand): Promise<ICommandResult>;

Parameter	Type	Description
transaction	ICommand or IUnsignedCommand	The signed or unsigned command object

Examples

Get account balance

typescript

const tr = Pact.builder  .execution(Pact.modules.coin['get-balance'](account))  .setMeta({ chainId: '0' })  .setNetworkId('mainnet04')  .createTransaction(); // We don't need to submit a transaction for just reading data,// so instead we just read the value from the local data of the blockchain nodeconst res = await dirtyRead(tr); if (res.result.status === 'failure') {  throw res.result.error;} const balance = res.result.data;

typescript

const tr = Pact.builder  .execution(Pact.modules.coin['get-balance'](account))  .setMeta({ chainId: '0' })  .setNetworkId('mainnet04')  .createTransaction(); // We don't need to submit a transaction for just reading data,// so instead we just read the value from the local data of the blockchain nodeconst res = await dirtyRead(tr); if (res.result.status === 'failure') {  throw res.result.error;} const balance = res.result.data;

preflight

Alias for local where preflight is true but signatureVerification is false.

typescript

preflight(transaction: ICommand | IUnsignedCommand): Promise<ICommandResult>;

typescript

preflight(transaction: ICommand | IUnsignedCommand): Promise<ICommandResult>;

Parameter	Type	Description
transaction	ICommand or IUnsignedCommand	The signed or unsigned command object

signatureVerification

Alias for local where preflight is false but signatureVerification is true.

typescript

signatureVerification(transaction: ICommand | IUnsignedCommand): Promise<ICommandResult & { preflightWarnings?: string[] }>;

typescript

signatureVerification(transaction: ICommand | IUnsignedCommand): Promise<ICommandResult & { preflightWarnings?: string[] }>;

Parameter	Type	Description
transaction	ICommand or IUnsignedCommand	The signed or unsigned command object

runPact

If you just want to see the result of a pact code and don't want to create a command object, you can use the runPact function. This function creates a command object internally.

typescript

runPact(code: string, data?: Record<string, unknown>, options?: { chainId: ChainId; networkId: string }): Promise<ICommandResult>;

typescript

runPact(code: string, data?: Record<string, unknown>, options?: { chainId: ChainId; networkId: string }): Promise<ICommandResult>;

Parameter	Type	Description
code	string	Pact code
data	Record<string, unknown>	Data to be sent with the transaction
options	object
chainId	string	Specifies the chain identifier that you want to send the transaction to. The valid values are "0" to "19".
networkId	string	Specifies the network identifier that you want to send the transaction to.

Examples

typescript

const { runPact } = createClient(); const result = await runPact(  `(coin.getBalance "alice")`,  {},  { networkId: 'mainnet01', chainId: '1' },);

typescript

const { runPact } = createClient(); const result = await runPact(  `(coin.getBalance "alice")`,  {},  { networkId: 'mainnet01', chainId: '1' },);

Requesting simple payment verification (spv)

You need SPV proof mainly for cross-chain transactions - but it's not limited to this, and you can request SPV proof for all kinds of transactions.

There are two functions for this purpose, both of which use the /spv endpoint:

createSPV
pollCreateSPV

createSPV

Request SPV proof if it's ready.

typescript

createSpv(transactionDescriptor: ITransactionDescriptor, targetChainId: ChainId): Promise<string>;

typescript

createSpv(transactionDescriptor: ITransactionDescriptor, targetChainId: ChainId): Promise<string>;

Parameter	Type	Description
transactionDescriptor	object	Specifies the request key, network identifier, and chain identifier for the transaction that you want to create a simple payment verification (spv) proof for.
targetChainId	string	Specifies the chain identifier that consumes this proof.

pollCreateSPV

Poll for the SPV proof and await until it's ready.

typescript

pollCreateSpv(  transactionDescriptor: ITransactionDescriptor,  targetChainId: ChainId,  pollOptions?: { onPoll?: (id: string) => void; timeout?: Milliseconds; interval?: Milliseconds; }): Promise<string>;

typescript

pollCreateSpv(  transactionDescriptor: ITransactionDescriptor,  targetChainId: ChainId,  pollOptions?: { onPoll?: (id: string) => void; timeout?: Milliseconds; interval?: Milliseconds; }): Promise<string>;

Parameter	Type	Description
transactionDescriptor	object	Specifies the request key, network identifier, and chain identifier for the transaction that you want to create a simple payment verification (spv) proof for.
targetChainId	string	Specifies the chain identifier that consumes this proof.
pollOptions	object	Optional poll configuration settings.
onPoll	string	Identifier for the callback that is called each time the node is polled for the status of a request key. This callback might be called several times if the request is not ready yet.
timeout	time	Specifies a timeout in milliseconds to stop polling if the result is not ready. The default is `180000` milliseconds (3 minutes).
interval	time	Specifies the delay between retry attempts. The default is `5000` milliseconds (5 seconds).

Examples

typescript

const request = await submit(crossChainTx);const response = await pollOne(request);// create spv proof for the transactionconst spvProof = await pollSpvProof(request); const continuationTx = Pact.builder  .continuation({    pactId: response.continuation.pactId,    rollback: false,    step: 1,    proof: spvProof,  })  .addMeta({    chainId: targetChainId,    // using gas station for paying gas fee    senderAccount: 'kadena-xchain-gas',  })  .createTransaction(); const contRequest = await submit(continuationTx);const finalResult = await pollOne(contRequest);

typescript

const request = await submit(crossChainTx);const response = await pollOne(request);// create spv proof for the transactionconst spvProof = await pollSpvProof(request); const continuationTx = Pact.builder  .continuation({    pactId: response.continuation.pactId,    rollback: false,    step: 1,    proof: spvProof,  })  .addMeta({    chainId: targetChainId,    // using gas station for paying gas fee    senderAccount: 'kadena-xchain-gas',  })  .createTransaction(); const contRequest = await submit(continuationTx);const finalResult = await pollOne(contRequest);

Functional programming to compose Pact commands

For additional flexibility, you can use the functional programming (FP) API to create Pact commands. The functional programming (FP) API supports the same functions as the command builder API. In fact, the command builder API uses the functional programming (FP) API under the hood. To reduce redundancy, this section lists the common functions with examples for using the composePactCommand function rather than repeating the full function descriptions and parameter tables.

Importing functions

To use the functional programming (FP) API, import functions from the @kadena/client/fp package. For example:

typescript

import { composePactCommand, execution } from '@kadena/client/fp';

typescript

import { composePactCommand, execution } from '@kadena/client/fp';

composePactCommand

The composePactCommand function let you compose parts of the Pact command and create the final command objects. The function accepts pure JSON as well as reducer functions. This function eventfully returns the IPartialPactCommand interface that is converted to a string for the cmd key in the JSON command object.

typescript

type CommandReducer = (cmd?: IPartialPactCommand | (() => IPartialPactCommand)) => IPartialPactCommand; composePactCommand(  ...reducersOrPartialCommands: Array<IPartialPactCommand | CommandReducer>  ): CommandReducer

typescript

type CommandReducer = (cmd?: IPartialPactCommand | (() => IPartialPactCommand)) => IPartialPactCommand; composePactCommand(  ...reducersOrPartialCommands: Array<IPartialPactCommand | CommandReducer>  ): CommandReducer

The return value is also a CommandReducer function that you can pass to another composePactCommand call. Eventually, when you call the function, it also adds the default values.

Parameter	Type	Description
...reducersOrPartialCommands	Array<IPartialPactCommand	CommandReducer>

Examples

typescript

const pactCommand = composePactCommand(  { payload: { exec: { code: '(+ 1 1)' } } },  (cmd) => ({ ...cmd, meta: { chainId: '1' } }),  { networkId: 'testnet04' },)(); const pactCommand = {  payload: { exec: { code: '(+ 1 1)' } },  meta: {    gasLimit: 2500,    gasPrice: 1e-8,    sender: '',    ttl: 28800,    creationTime: 1690416000,    chainId: '1',  },  networkId: 'testnet04',  nonce: 'kjs:nonce:1690416000000',  signers: [],};

typescript

const pactCommand = composePactCommand(  { payload: { exec: { code: '(+ 1 1)' } } },  (cmd) => ({ ...cmd, meta: { chainId: '1' } }),  { networkId: 'testnet04' },)(); const pactCommand = {  payload: { exec: { code: '(+ 1 1)' } },  meta: {    gasLimit: 2500,    gasPrice: 1e-8,    sender: '',    ttl: 28800,    creationTime: 1690416000,    chainId: '1',  },  networkId: 'testnet04',  nonce: 'kjs:nonce:1690416000000',  signers: [],};

execution

To create IPactCommand.payload.exec.code:

typescript

execution(...codes): { payload: { exec : { code: string, data: {} } }}

typescript

execution(...codes): { payload: { exec : { code: string, data: {} } }}

For example, using strings:

typescript

const command: IPactCommand = composePactCommand(  execution(`(coin.transfer "alice" "bob" 1.1)`),)();

typescript

const command: IPactCommand = composePactCommand(  execution(`(coin.transfer "alice" "bob" 1.1)`),)();

For example, using Pact.modules:

typescript

const command: IPactCommand = composePactCommand(  execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' })),)();

typescript

const command: IPactCommand = composePactCommand(  execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' })),)();

continuation

To create IPactCommand.payload.cont:

typescript

continuation(contData: {  pactId?: string;  step?: number;  rollback?: boolean;  data?: Record<string, unknown>;  proof?: string | null;}): {  payload: {    cont: {      pactId?: string;      step?: number;      rollback?: boolean;      data?: Record<string, unknown>;      proof?: string | null;    };  };};

typescript

continuation(contData: {  pactId?: string;  step?: number;  rollback?: boolean;  data?: Record<string, unknown>;  proof?: string | null;}): {  payload: {    cont: {      pactId?: string;      step?: number;      rollback?: boolean;      data?: Record<string, unknown>;      proof?: string | null;    };  };};

For example:

typescript

const command: IPactCommand = composePactCommand(  continuation({    pactId,    rollback: false,    step: 1,    proof: spvProof,  }),)();

typescript

const command: IPactCommand = composePactCommand(  continuation({    pactId,    rollback: false,    step: 1,    proof: spvProof,  }),)();

addSigner

To add IPactCommand.signers:

typescript

addSigner(signerOrSignersList, capabilityCallback): CommandReducer;

typescript

addSigner(signerOrSignersList, capabilityCallback): CommandReducer;

For example, add a signer:

typescript

// ED25519 keyconst alicePublicKey =  'e7f4da07b1d200f6e45aa6492afed6819297a97563859a5f0df9c54f5abd4aab'; composePactCommand(  execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' })),  addSigner(alicePublicKey, (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]),);

typescript

// ED25519 keyconst alicePublicKey =  'e7f4da07b1d200f6e45aa6492afed6819297a97563859a5f0df9c54f5abd4aab'; composePactCommand(  execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' })),  addSigner(alicePublicKey, (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]),);

Add a signer with WebAuthn scheme:

typescript

composePactCommand(  execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' })),  addSigner({ pubKey: webAuthnPublicKey, scheme: 'WebAuthn' }, (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]),);

typescript

composePactCommand(  execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' })),  addSigner({ pubKey: webAuthnPublicKey, scheme: 'WebAuthn' }, (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]),);

Add a list of signers with no capabilities:

typescript

composePactCommand(  execution('(free.my-module.my-function)'),  addSigner([    'ED25519_publicKey',    { pubKey: 'WebAuthn_publicKey', scheme: 'WebAuthn' },  ]),);

typescript

composePactCommand(  execution('(free.my-module.my-function)'),  addSigner([    'ED25519_publicKey',    { pubKey: 'WebAuthn_publicKey', scheme: 'WebAuthn' },  ]),);

Add a list of signers with similar capabilities:

typescript

const pactCommand = composePactCommand(  execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' })),  // e.g., Alice's account is guarded by two keys  addSigner(['first_publicKey', 'second_publicKey'], (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]),)(); const equivalentPactCommand = {  payload: {    exec: {      code: '(coin.transfer "alice" "bob" 1.1 )',      data: {},    },  },  signers: [    {      pubKey: 'first_publicKey',      scheme: 'ED25519',      clist: [        { name: 'coin.TRANSFER', args: ['alice', 'bob', { decimal: '1.1' }] },      ],    },    {      pubKey: 'second_publicKey',      scheme: 'ED25519',      clist: [        { name: 'coin.TRANSFER', args: ['alice', 'bob', { decimal: '1.1' }] },      ],    },  ],};

typescript

const pactCommand = composePactCommand(  execution(Pact.modules.coin.transfer('alice', 'bob', { decimal: '1.1' })),  // e.g., Alice's account is guarded by two keys  addSigner(['first_publicKey', 'second_publicKey'], (signFor) => [    signFor('coin.TRANSFER', 'alice', 'bob', { decimal: '1.1' }),  ]),)(); const equivalentPactCommand = {  payload: {    exec: {      code: '(coin.transfer "alice" "bob" 1.1 )',      data: {},    },  },  signers: [    {      pubKey: 'first_publicKey',      scheme: 'ED25519',      clist: [        { name: 'coin.TRANSFER', args: ['alice', 'bob', { decimal: '1.1' }] },      ],    },    {      pubKey: 'second_publicKey',      scheme: 'ED25519',      clist: [        { name: 'coin.TRANSFER', args: ['alice', 'bob', { decimal: '1.1' }] },      ],    },  ],};

addData

To add data to IPactCommand.payload.exec.data or IPactCommand.payload.cont.data:

typescript

addData(key, value): CommandReducer

typescript

addData(key, value): CommandReducer

For example, to transfer with parameters in data:

typescript

composePactCommand(  execution(    '(coin.transfer (read-string "sender") (read-string "receiver") 1.1)',  ),  addData('sender', sender),  addData('receiver', sender),);

typescript

composePactCommand(  execution(    '(coin.transfer (read-string "sender") (read-string "receiver") 1.1)',  ),  addData('sender', sender),  addData('receiver', sender),);

Send the receiver guard:

typescript

composePactCommand(  execution(    '(coin.transfer-create "alice" "bob" (read-keyset "bob-guard") 1.1)',  ),  addData('bob-guard', {    keys: ['bob-public-key'],    pred: 'keys-all',  }),);

typescript

composePactCommand(  execution(    '(coin.transfer-create "alice" "bob" (read-keyset "bob-guard") 1.1)',  ),  addData('bob-guard', {    keys: ['bob-public-key'],    pred: 'keys-all',  }),);

addKeyset

To add a keyset:

typescript

addKeyset(name, pred, ...keys): CommandReducer

typescript

addKeyset(name, pred, ...keys): CommandReducer

For example, to add a keyset using the readKeyset helper function:

typescript

composePactCommand(  execution(    Pact.modules.coin['transfer-create'](      'alice',      'bob',      readKeyset('bob-guard'),      { decimal: '1.1' },    ),  ),  addKeyset('bob-guard', 'keys-all', 'bob-public-key'),);

typescript

composePactCommand(  execution(    Pact.modules.coin['transfer-create'](      'alice',      'bob',      readKeyset('bob-guard'),      { decimal: '1.1' },    ),  ),  addKeyset('bob-guard', 'keys-all', 'bob-public-key'),);

setMeta

To add IPactCommand.meta metadata properties to a command:

typescript

setMeta(meta): CommandReducer

typescript

setMeta(meta): CommandReducer

For example:

typescript

composePactCommand(  execution('(coin.transfer "alice" "bob" 1.1)'),  // "bob is paying gas fee"  setMeta({ chainId: '02', senderAccount: 'bob' }),);

typescript

composePactCommand(  execution('(coin.transfer "alice" "bob" 1.1)'),  // "bob is paying gas fee"  setMeta({ chainId: '02', senderAccount: 'bob' }),);

etNonce

To manually set IPactCommand.nonce:

typescript

setNonce(nonce): { nonce: string };

typescript

setNonce(nonce): { nonce: string };

For example:

typescript

composePactCommand(  execution('(coin.transfer "alice" "bob" 1.1)'),  // "bob is paying gas fee"  setNonce('a-custom-nonce'),);

typescript

composePactCommand(  execution('(coin.transfer "alice" "bob" 1.1)'),  // "bob is paying gas fee"  setNonce('a-custom-nonce'),);

setNetworkId

To set IPactCommand.network:

typescript

setNetworkId(networkId): { networkId : string }

typescript

setNetworkId(networkId): { networkId : string }

For example:

typescript

composePactCommand(  execution('(coin.transfer "alice" "bob" 1.1)'),  // "bob is paying gas fee"  setNetworkId('testnet04'),);

typescript

composePactCommand(  execution('(coin.transfer "alice" "bob" 1.1)'),  // "bob is paying gas fee"  setNetworkId('testnet04'),);

createTransaction

To create the transaction object:

typescript

createTransaction(pactCommand:IPactCommand): IUnsignedCommand

typescript

createTransaction(pactCommand:IPactCommand): IUnsignedCommand

For example:

typescript

const pactCommand = composePactCommand(  execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount)),  addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ]),  setMeta({ chainId: '0', senderAccount }),  setNetworkId(NETWORK_ID),  createTransaction(),); const transaction = createTransaction(pactCommand); const output = {  cmd: '{"payload":{"exec":{"code":"(coin.transfer \\"k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46\\" \\"k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11\\" 1.0)","data":{}}},"nonce":"kjs:nonce:1711376792115","signers":[{"pubKey":"dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","scheme":"ED25519","clist":[{"name":"coin.GAS","args":[]},{"name":"coin.TRANSFER","args":["k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11",{"decimal":"1"}]}]}],"meta":{"gasLimit":2500,"gasPrice":1e-8,"sender":"k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","ttl":28800,"creationTime":1711376792,"chainId":"0"},"networkId":"testnet04"}',  hash: 'xYePm_YgO6-T9yIlCZWzOt2s4CkZcQwqWx9Iu5tVSLI',  sigs: [undefined],};

typescript

const pactCommand = composePactCommand(  execution(Pact.modules.coin.transfer(senderAccount, receiverAccount, amount)),  addSigner(senderKey, (signFor) => [    signFor('coin.GAS'),    signFor('coin.TRANSFER', senderAccount, receiverAccount, amount),  ]),  setMeta({ chainId: '0', senderAccount }),  setNetworkId(NETWORK_ID),  createTransaction(),); const transaction = createTransaction(pactCommand); const output = {  cmd: '{"payload":{"exec":{"code":"(coin.transfer \\"k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46\\" \\"k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11\\" 1.0)","data":{}}},"nonce":"kjs:nonce:1711376792115","signers":[{"pubKey":"dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","scheme":"ED25519","clist":[{"name":"coin.GAS","args":[]},{"name":"coin.TRANSFER","args":["k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","k:2f48080efe54e6eb670487f664bcaac7684b4ebfcfc8a3330ef080c9c97f7e11",{"decimal":"1"}]}]}],"meta":{"gasLimit":2500,"gasPrice":1e-8,"sender":"k:dc20ab800b0420be9b1075c97e80b104b073b0405b5e2b78afd29dd74aaf5e46","ttl":28800,"creationTime":1711376792,"chainId":"0"},"networkId":"testnet04"}',  hash: 'xYePm_YgO6-T9yIlCZWzOt2s4CkZcQwqWx9Iu5tVSLI',  sigs: [undefined],};