fix(sdk): add .js extensions to all ESM imports for Node.js compatibility

sdk/ts-compat/src/app-signing.ts

@@ -1,6 +1,6 @@
 import { Address, Hex, concatHex, encodeAbiParameters, keccak256 } from 'viem';
 
-import { RPCAppStateIntent } from './types';
+import { RPCAppStateIntent } from './types.js';
 
 const WALLET_QUORUM_PREFIX = '0xa1' as Hex;
 const SESSION_KEY_QUORUM_PREFIX = '0xa2' as Hex;

sdk/ts-compat/src/auth.ts

@@ -5,9 +5,9 @@
  * auth_request / auth_verify flow over WebSocket.
  */
 
-import { NitroliteRPC } from './rpc';
-import { RPCMethod, EIP712AuthTypes } from './types';
-import type { MessageSigner, MessageSignerPayload } from './types';
+import { NitroliteRPC } from './rpc.js';
+import { RPCMethod, EIP712AuthTypes } from './types.js';
+import type { MessageSigner, MessageSignerPayload } from './types.js';
 
 export interface AuthRequestParams {
     address: string;

sdk/ts-compat/src/client.ts

@@ -14,7 +14,7 @@ import type {
     ChannelSessionKeyStateV1,
 } from '@yellow-org/sdk';
 import type * as core from '@yellow-org/sdk';
-import Decimal from 'decimal.js';
+import { Decimal } from 'decimal.js';
 import { Address, Hex, WalletClient, createPublicClient, http, formatUnits, parseUnits } from 'viem';
 
 import type {
@@ -36,17 +36,17 @@ import type {
     GetAppDefinitionResponseParams,
     CreateAppSessionRequestParams,
     CloseAppSessionRequestParams,
-} from './types';
-import { RPCAppStateIntent } from './types';
+} from './types.js';
+import { RPCAppStateIntent } from './types.js';
 
-import { buildClientOptions, type CompatClientConfig } from './config';
+import { buildClientOptions, type CompatClientConfig } from './config.js';
 import {
     AllowanceError,
     InsufficientFundsError,
     NotInitializedError,
     OngoingStateTransitionError,
     UserRejectedError,
-} from './errors';
+} from './errors.js';
 
 // ---------------------------------------------------------------------------
 // WalletClient-based signers for browser (MetaMask) environments

sdk/ts-compat/src/events.ts

@@ -1,5 +1,5 @@
-import type { NitroliteClient } from './client';
-import type { LedgerChannel, LedgerBalance, ClearNodeAsset } from './types';
+import type { NitroliteClient } from './client.js';
+import type { LedgerChannel, LedgerBalance, ClearNodeAsset } from './types.js';
 
 export interface EventPollerCallbacks {
     onChannelUpdate?: (channels: LedgerChannel[]) => void;

sdk/ts-compat/src/index.ts

@@ -6,10 +6,10 @@
 // =============================================================================
 
 // --- Client facade ---
-export { NitroliteClient, type NitroliteClientConfig } from './client';
+export { NitroliteClient, type NitroliteClientConfig } from './client.js';
 
 // --- Signers ---
-export { WalletStateSigner, createECDSAMessageSigner } from './signers';
+export { WalletStateSigner, createECDSAMessageSigner } from './signers.js';
 
 // --- Auth helpers ---
 export {
@@ -18,7 +18,7 @@ export {
     createAuthVerifyMessageWithJWT,
     createEIP712AuthMessageSigner,
     type AuthRequestParams,
-} from './auth';
+} from './auth.js';
 
 // --- App session signing helpers ---
 export {
@@ -30,7 +30,7 @@ export {
     type CreateAppSessionHashParams,
     type SubmitAppStateHashAllocation,
     type SubmitAppStateHashParams,
-} from './app-signing';
+} from './app-signing.js';
 
 // --- RPC helpers ---
 export {
@@ -61,7 +61,7 @@ export {
     createPingMessage,
     convertRPCToClientChannel,
     convertRPCToClientState,
-} from './rpc';
+} from './rpc.js';
 
 // --- Types ---
 export {
@@ -104,7 +104,7 @@ export {
     type AuthChallengeResponse,
     type TransferNotificationResponseParams,
     type LedgerAccountType,
-} from './types';
+} from './types.js';
 
 // --- Clearnode response types (used by consuming apps' stores) ---
 export type {
@@ -114,7 +114,7 @@ export type {
     LedgerEntry,
     AppSession,
     ClearNodeAsset,
-} from './types';
+} from './types.js';
 
 // --- Errors ---
 export {
@@ -125,13 +125,13 @@ export {
     NotInitializedError,
     OngoingStateTransitionError,
     getUserFacingMessage,
-} from './errors';
+} from './errors.js';
 
 // --- Events ---
-export { EventPoller, type EventPollerCallbacks } from './events';
+export { EventPoller, type EventPollerCallbacks } from './events.js';
 
 // --- Config ---
-export { buildClientOptions, blockchainRPCsFromEnv, type CompatClientConfig } from './config';
+export { buildClientOptions, blockchainRPCsFromEnv, type CompatClientConfig } from './config.js';
 
 // NOTE: SDK classes (Client, ChannelDefaultSigner, etc.) are intentionally NOT
 // re-exported here. Barrel re-exports from '@yellow-org/sdk' trigger eager

sdk/ts-compat/src/rpc.ts

@@ -11,7 +11,7 @@
  * lightweight placeholders while parse* helpers normalize response shapes.
  */
 
-import type { MessageSigner, RPCResponse, NitroliteRPCMessage } from './types';
+import type { MessageSigner, RPCResponse, NitroliteRPCMessage } from './types.js';
 
 // ---------------------------------------------------------------------------
 // parseAnyRPCResponse -- pass-through

sdk/ts-compat/src/signers.ts

@@ -1,6 +1,6 @@
 import { Hex } from 'viem';
 import { privateKeyToAccount } from 'viem/accounts';
-import type { MessageSigner, MessageSignerPayload } from './types';
+import type { MessageSigner, MessageSignerPayload } from './types.js';
 
 /**
  * v0.5.3-compatible WalletStateSigner.

sdk/ts-compat/tsconfig.json

@@ -1,7 +1,7 @@
 {
     "compilerOptions": {
         "target": "es2020",
-        "module": "ESNext",
+        "module": "Node16",
         "declaration": true,
         "declarationMap": true,
         "sourceMap": true,
@@ -11,7 +11,7 @@
         "skipLibCheck": true,
         "forceConsistentCasingInFileNames": true,
         "resolveJsonModule": true,
-        "moduleResolution": "bundler",
+        "moduleResolution": "Node16",
         "isolatedModules": true,
         "types": ["node"]
     },

sdk/ts/src/app/index.ts

@@ -3,5 +3,5 @@
  * This module contains types and functions for managing application sessions
  */
 
-export * from './types';
-export * from './packing';
+export * from './types.js';
+export * from './packing.js';

sdk/ts/src/app/packing.ts

@@ -4,8 +4,8 @@ import {
   AppStateUpdateV1,
   AppSessionKeyStateV1,
   AppSessionVersionV1,
-} from './types';
-import { AppV1 } from '../rpc/types';
+} from './types.js';
+import { AppV1 } from '../rpc/types.js';
 
 /**
  * PackCreateAppSessionRequestV1 packs the Definition and SessionData for signing using ABI encoding.

sdk/ts/src/app/types.ts

@@ -1,5 +1,5 @@
 import { Address } from 'viem';
-import Decimal from 'decimal.js';
+import { Decimal } from 'decimal.js';
 
 // ============================================================================
 // Enums

sdk/ts/src/asset_store.ts

@@ -3,7 +3,7 @@
  */
 
 import { Address } from 'viem';
-import * as core from './core/types';
+import * as core from './core/types.js';
 
 /**
  * ClientAssetStore implements asset caching by fetching data from the Nitrolite API.

sdk/ts/src/blockchain/evm/client.ts

@@ -4,17 +4,17 @@
  */
 
 import { Address, Hex, hexToBytes, zeroAddress } from 'viem';
-import Decimal from 'decimal.js';
-import * as core from '../../core/types';
-import { decimalToBigInt } from '../../core/utils';
-import { AssetStore, EVMClient, WalletSigner } from './interface';
-import { ChannelHubAbi } from './channel_hub_abi';
+import { Decimal } from 'decimal.js';
+import * as core from '../../core/types.js';
+import { decimalToBigInt } from '../../core/utils.js';
+import { AssetStore, EVMClient, WalletSigner } from './interface.js';
+import { ChannelHubAbi } from './channel_hub_abi.js';
 import {
   coreDefToContractDef,
   coreStateToContractState,
   contractStateToCoreState,
-} from './utils';
-import { newERC20 } from './erc20';
+} from './utils.js';
+import { newERC20 } from './erc20.js';
 
 /**
  * ClientOptions for configuring the blockchain client

sdk/ts/src/blockchain/evm/erc20.ts

@@ -3,8 +3,8 @@
  */
 
 import { Address } from 'viem';
-import { Erc20Abi } from './erc20_abi';
-import { EVMClient, WalletSigner } from './interface';
+import { Erc20Abi } from './erc20_abi.js';
+import { EVMClient, WalletSigner } from './interface.js';
 
 /**
  * ERC20 contract wrapper for token interactions

sdk/ts/src/blockchain/evm/index.ts

@@ -2,11 +2,11 @@
  * EVM blockchain implementation exports
  */
 
-export * from './interface';
-export * from './types';
-export * from './utils';
-export * from './erc20';
-export * from './channel_hub_abi';
-export * from './client';
-export * from './app_registry_abi';
-export * from './locking_client';
+export * from './interface.js';
+export * from './types.js';
+export * from './utils.js';
+export * from './erc20.js';
+export * from './channel_hub_abi.js';
+export * from './client.js';
+export * from './app_registry_abi.js';
+export * from './locking_client.js';

sdk/ts/src/blockchain/evm/locking_client.ts

@@ -4,11 +4,11 @@
  */
 
 import { Address } from 'viem';
-import Decimal from 'decimal.js';
-import { decimalToBigInt } from '../../core/utils';
-import { EVMClient, WalletSigner } from './interface';
-import { AppRegistryAbi } from './app_registry_abi';
-import { Erc20Abi } from './erc20_abi';
+import { Decimal } from 'decimal.js';
+import { decimalToBigInt } from '../../core/utils.js';
+import { EVMClient, WalletSigner } from './interface.js';
+import { AppRegistryAbi } from './app_registry_abi.js';
+import { Erc20Abi } from './erc20_abi.js';
 
 /**
  * LockingClient provides methods to interact with the Locking (NonSlashableAppRegistry) contract.

sdk/ts/src/blockchain/evm/utils.ts

@@ -3,10 +3,10 @@
  */
 
 import { Address, Hex, hexToBytes } from 'viem';
-import Decimal from 'decimal.js';
-import * as core from '../../core/types';
-import { decimalToBigInt, generateChannelMetadata, getStateTransitionHash } from '../../core/utils';
-import { ChannelDefinition, Ledger, State } from './types';
+import { Decimal } from 'decimal.js';
+import * as core from '../../core/types.js';
+import { decimalToBigInt, generateChannelMetadata, getStateTransitionHash } from '../../core/utils.js';
+import { ChannelDefinition, Ledger, State } from './types.js';
 
 /**
  * hexToBytes32 converts a hex string to a 32-byte array

sdk/ts/src/blockchain/index.ts

@@ -2,4 +2,4 @@
  * Blockchain implementations
  */
 
-export * as evm from './evm';
+export * as evm from './evm/index.js';

sdk/ts/src/client.ts

@@ -6,15 +6,15 @@
  */
 
 import { Address, Hex, createPublicClient, createWalletClient, http, custom, verifyMessage } from 'viem';
-import Decimal from 'decimal.js';
-import * as core from './core';
-import * as app from './app';
-import * as API from './rpc/api';
-import { StateV1, ChannelDefinitionV1, ChannelSessionKeyStateV1, AppV1, AppInfoV1 } from './rpc/types';
-import { RPCClient } from './rpc/client';
-import { WebsocketDialer } from './rpc/dialer';
-import { ClientAssetStore } from './asset_store';
-import { Config, DefaultConfig, Option } from './config';
+import { Decimal } from 'decimal.js';
+import * as core from './core/index.js';
+import * as app from './app/index.js';
+import * as API from './rpc/api.js';
+import { StateV1, ChannelDefinitionV1, ChannelSessionKeyStateV1, AppV1, AppInfoV1 } from './rpc/types.js';
+import { RPCClient } from './rpc/client.js';
+import { WebsocketDialer } from './rpc/dialer.js';
+import { ClientAssetStore } from './asset_store.js';
+import { Config, DefaultConfig, Option } from './config.js';
 import {
   generateNonce,
   transformNodeConfig,
@@ -30,12 +30,12 @@ import {
   transformAppSessionInfo,
   transformAppDefinitionFromRPC,
   transformActionAllowance,
-} from './utils';
-import * as blockchain from './blockchain';
-import { nextState, applyChannelCreation, applyAcknowledgementTransition, applyHomeDepositTransition, applyHomeWithdrawalTransition, applyTransferSendTransition, applyFinalizeTransition, applyCommitTransition } from './core/state';
-import { newVoidState } from './core/types';
-import { packState, packChallengeState } from './core/state_packer';
-import { StateSigner, TransactionSigner } from './signers';
+} from './utils.js';
+import * as blockchain from './blockchain/index.js';
+import { nextState, applyChannelCreation, applyAcknowledgementTransition, applyHomeDepositTransition, applyHomeWithdrawalTransition, applyTransferSendTransition, applyFinalizeTransition, applyCommitTransition } from './core/state.js';
+import { newVoidState } from './core/types.js';
+import { packState, packChallengeState } from './core/state_packer.js';
+import { StateSigner, TransactionSigner } from './signers.js';
 
 /**
  * Default challenge period for channels (1 day in seconds)

sdk/ts/src/core/index.ts

@@ -6,19 +6,19 @@
 // and on-chain encoding.
 
 // Export all types
-export * from './types';
+export * from './types.js';
 
 // Export all interfaces
-export * from './interface';
+export * from './interface.js';
 
 // Export all event types
-export * from './event';
+export * from './event.js';
 
 // Export all utility functions
-export * from './utils';
+export * from './utils.js';
 
 // Export all state methods and transitions
-export * from './state';
+export * from './state.js';
 
 // Export state packer
-export * from './state_packer';
+export * from './state_packer.js';

sdk/ts/src/core/interface.ts

@@ -1,12 +1,12 @@
 import { Address, Hex } from 'viem';
-import Decimal from 'decimal.js';
+import { Decimal } from 'decimal.js';
 import {
   State,
   ChannelDefinition,
   HomeChannelDataResponse,
   EscrowDepositDataResponse,
   EscrowWithdrawalDataResponse,
-} from './types';
+} from './types.js';
 import {
   HomeChannelCreatedEvent,
   HomeChannelMigratedEvent,
@@ -19,7 +19,7 @@ import {
   EscrowWithdrawalInitiatedEvent,
   EscrowWithdrawalChallengedEvent,
   EscrowWithdrawalFinalizedEvent,
-} from './event';
+} from './event.js';
 
 // ============================================================================
 // Listener Interface