XPR Network Developer Skill#

This skill provides comprehensive knowledge for developing on XPR Network, a fast, gas-free blockchain with WebAuthn wallet support.

IMPORTANT DISCLAIMER: AI-Generated Smart Contract Code

Smart contracts handle real assets and are immutable once deployed. AI-generated code, including code produced with this skill, should always be reviewed by an experienced developer before deployment to mainnet.

• Test thoroughly on testnet before any mainnet deployment
• Have code reviewed by someone familiar with XPR Network/EOSIO smart contracts
• Audit critical contracts - consider professional security audits for contracts handling significant value
• Understand the code - don't deploy code you don't fully understand

Claude can accelerate development and help with patterns, but it does not replace proper code review, testing, and auditing practices.

XPR Network Overview#

XPR Network is an EOS-based blockchain optimized for payments and identity:

FeatureDescriptionSpeed0.5 second block times, 4000+ TPSFeesZero gas fees for end usersAccountsHuman-readable names (1-12 chars, a-z, 1-5)WalletsWebAuthn support (Face ID, fingerprint, security keys)ContractsAssemblyScript/TypeScript with @proton/ts-contractsStorageOn-chain tables with RAM-based pricing

Name Change: Proton → XPR Network#

The blockchain was rebranded from Proton to XPR Network in 2024. You may see legacy references to "Proton" in:

• Package names ( @proton/cli, @proton/web-sdk, proton-tsc)
• GitHub organization ( XPRNetwork, formerly ProtonProtocol)
• Documentation and code comments
• Explorer (now explorer.xprnetwork.org, formerly protonscan.io and proton.bloks.io)

The token symbol remains XPR and all functionality is unchanged.

Chain IDs#

NetworkChain IDMainnet384da888112027f0321850a169f737c33e53b388aad48b5adace4bab97f437e0Testnet71ee83bcf52142d61019d95f9cc5427ba6a0d7ff8accd9e2088ae2abeaf3d3dd

Progressive Disclosure#

Load specialized modules based on your task:

Core Development#

ModuleRead WhenKey Topicssmart-contracts.mdBuilding contractsTables, actions, auth, build/deploycli-reference.mdUsing CLI toolsNetwork, keys, deploy, queries, transfersweb-sdk.mdBuilding dAppsWallet connect, transactions, sessions, transfersbackend-patterns.mdServer-side devproton CLI keychain signing (v0.3.0+), bots, key isolationrpc-queries.mdReading chain dataRPC, Hyperion API, Light API, pagination, token balancestesting-debugging.mdTesting contractsUnit tests, testnet, debugging, logsaccounts-permissions.mdAccount managementCreate accounts, permissions, multisigstaking-governance.mdStaking & votingXPR staking, BPs, DPoS, resource model

Token & Identity#

ModuleRead WhenKey Topicstoken-creation.mdCreating tokensFungible tokens, issuance, vestingwebauth-identity.mdUser identityWebAuth wallets, KYC, profiles, trustnfts-atomicassets.mdNFT developmentCollections, schemas, minting, marketplace

DeFi & Trading#

ModuleRead WhenKey Topicsmetalx-dex.mdDEX integrationMetalX DEX API reference, order format, error codesdefi-trading.mdTrading bots/DeFiTrading bot patterns, swap pools, DeFi strategiessimpledex.mdToken launch & AMMSimpleDEX swaps, bonding curves, token creation, graduationloan-protocol.mdLending protocolLOAN protocol, supply, borrow, liquidationsoracles-randomness.mdPrice feeds & RNGOracle prices, verifiable random numbers

Integration Patterns#

ModuleRead WhenKey Topicsreal-time-events.mdLive updatesHyperion streaming, WebSockets, notificationspayment-patterns.mdCommerce/paymentsPayment links, invoicing, POS, subscriptions

Infrastructure#

ModuleRead WhenKey Topicsnode-operation.mdRunning nodesAPI nodes, Block Producers, validators

Safety & Reference#

ModuleRead WhenKey Topicssafety-guidelines.mdBEFORE modifying contractsTable rules, deployment safety, recoverytroubleshooting.mdDebugging errorsCommon errors, solutions, diagnosticsexamples.mdLearning patternsPriceBattle, ProtonWall, ProtonRatingresources.mdFinding endpointsRPC URLs, docs, explorers, community

CRITICAL: Before Modifying Contracts#

Read: safety-guidelines.md

• NEVER modify existing table structures with data
• Pre-deployment checklist
• Recovery procedures

---

Quick Reference#

Common CLI Commands#

bash

# Install CLI
npm i -g @proton/cli

# Set network
proton chain:set proton          # Mainnet
proton chain:set proton-test     # Testnet

# Account info
proton account myaccount -t      # With token balances

# Query table
proton table CONTRACT TABLE

# Execute action
proton action CONTRACT ACTION 'JSON_DATA' AUTHORIZATION

# Deploy contract
proton contract:set ACCOUNT ./assembly/target

Common RPC Query#

javascript

import { JsonRpc } from '@proton/js';
const rpc = new JsonRpc('https://proton.eosusa.io');

const { rows } = await rpc.get_table_rows({
  code: 'CONTRACT',
  scope: 'CONTRACT',
  table: 'TABLE',
  limit: 100
});

Basic Contract Structure#

typescript

import { Contract, Table, TableStore, Name, requireAuth } from 'proton-tsc';

@table("mydata")
class MyData extends Table {
  constructor(
    public id: u64 = 0,
    public owner: Name = new Name(),
    public value: string = ""
  ) { super(); }

  @primary
  get primary(): u64 { return this.id; }
}

@contract
class MyContract extends Contract {
  dataTable: TableStore<MyData> = new TableStore<MyData>(this.receiver);

  @action("store")
  store(owner: Name, value: string): void {
    requireAuth(owner);
    const row = new MyData(this.dataTable.availablePrimaryKey, owner, value);
    this.dataTable.store(row, this.receiver);
  }
}

Basic Frontend Login#

typescript

import '@proton/link';  // Required for mobile wallet support
import ProtonWebSDK from '@proton/web-sdk';

const { link, session } = await ProtonWebSDK({
  linkOptions: {
    chainId: '384da888112027f0321850a169f737c33e53b388aad48b5adace4bab97f437e0',
    endpoints: ['https://proton.eosusa.io']
  },
  selectorOptions: { appName: 'My App' }
});

// session.auth contains { actor, permission }
// Use session.transact() for transactions

---

Key Packages#

PackagePurposeInstall@proton/cliCommand-line toolsnpm i -g @proton/cli``proton-tscContract developmentnpm i proton-tsc``@proton/web-sdkFrontend wallet integrationnpm i @proton/web-sdk``@proton/linkMobile wallet transport (required with web-sdk)npm i @proton/link``@proton/jsRPC queriesnpm i @proton/js

Official Resources#

• Documentation: https://docs.xprnetwork.org
• GitHub: https://github.com/XPRNetwork
• Block Explorer: https://explorer.xprnetwork.org
• Resources Portal: https://resources.xprnetwork.org (buy RAM, etc.)

---

Safety Reminders#

1. NEVER modify existing table structures once deployed with data - this breaks deserialization
2. Always test on testnet before mainnet deployment
3. Verify the target account before deploying - wrong account = overwrite existing contract
4. Back up ABIs before deploying changes
5. Use new tables for new features instead of modifying existing ones
6. DEX deposits MUST use empty memo ( "") — any other memo (e.g. "deposit") causes permanent, irrecoverable fund loss. See metalx-dex.md.
7. All-numeric account names (e.g. 333555) cause silent data loss in get_table_rows — see rpc-queries.md for workarounds.