Live
The Hedera Codex

Enterprise-Grade.
Predictable Fees.

16 modules. One real project. Every command narrated. Every error explained. Master Hedera's Hashgraph consensus, Token Service, Consensus Service, smart contracts, and production patterns — and leave with a portfolio project and the lore.

16Modules
~6Hours
40+Error Recoveries
1Real Project
Start Free Trial → View Curriculum ↓
Why Hedera

Why practitioners choose Hedera

⬢
Hashgraph: the fastest consensus

Hedera's aBFT consensus achieves 10,000+ TPS with 3-5 second finality. No mining, no staking races — gossip about gossip and virtual voting make it mathematically optimal.

⊛
USD-denominated fees

Hedera's fees are fixed in USD, not HBAR. A token transfer costs $0.001, regardless of network congestion. Predictable costs for enterprise applications.

★
Native services, not just contracts

Token Service (HTS), Consensus Service (HCS), Smart Contract Service (HSCS) — Hedera provides purpose-built services at the network level, not just a smart contract layer.

⌖
Governed by industry leaders

The Hedera Governing Council includes Google, IBM, Boeing, and more. Enterprise-grade governance with term limits and decentralized control over network upgrades.

Curriculum

Every module builds toward one real product

You don't do isolated exercises. From Module 00 to Module 15, you build a complete enterprise application on Hedera. By the end, you'll have a production-ready project and the lore to back it up.

00
Environment Setup + Day 0 Quick Win
Get your Hedera development environment running and submit your first transaction.
15 min

What You'll Learn

  • Hedera SDK setup
  • TestNet configuration

What You'll Do

  • Install Hedera SDK
  • Submit first transaction
01
Consensus: How Hashgraph aBFT Works
Gossip about gossip, virtual voting, and why Hashgraph is mathematically optimal.
theoryconsensusaBFTFREE
30 min

What You'll Learn

  • Hashgraph aBFT consensus
  • Gossip protocol
  • Virtual voting

What You'll Do

  • Build mental model of Hashgraph
  • Compare to BFT variants
02
Run Your Local Node
Hedera local node in Docker. Configure, query, and test against your own network.
27 min

What You'll Learn

  • Local node architecture
  • Mirror node setup

What You'll Do

  • Run local network
  • Query node status
  • BREAK IT — misconfigured node
03
Accounts & Keys
Account creation, ED25519/ECDSA keys, threshold keys, and key lists.
29 min

What You'll Learn

  • Account creation flow
  • Key types and threshold keys

What You'll Do

  • Create accounts
  • Configure threshold keys
  • BREAK IT — wrong key type
04
Account State & Balances
Account info, balance queries, auto-renew, and the Hedera state model.
31 min

What You'll Learn

  • Account state structure
  • Auto-renew mechanics

What You'll Do

  • Query account info
  • Track balance changes
05
Transactions: Full Lifecycle
Build, sign, submit, and get receipts. Transaction types, fees, and record queries.
30 min

What You'll Learn

  • Transaction lifecycle
  • Fee model (USD-denominated)

What You'll Do

  • Send HBAR transfer
  • Query transaction record
  • BREAK IT — insufficient fee
06
Hedera Token Service (HTS)
Create fungible and non-fungible tokens at the network level. No smart contracts required.
33 min

What You'll Learn

  • HTS token creation
  • Admin, supply, freeze, wipe keys

What You'll Do

  • Create fungible token
  • Mint and transfer
  • BREAK IT — missing association
07
NFTs & Token Operations
Non-fungible tokens, royalties, and advanced token operations on HTS.
32 min

What You'll Learn

  • NFT creation and minting
  • Royalty fees

What You'll Do

  • Mint NFTs
  • Configure royalties
08
Hedera Consensus Service (HCS)
Decentralized, ordered, timestamped messages. The backbone for audit trails and event sourcing.
33 min

What You'll Learn

  • HCS topic creation
  • Message ordering guarantees

What You'll Do

  • Create topic and submit messages
  • Subscribe to topic via mirror node
09
Smart Contracts (HSCS)
Deploy Solidity contracts on Hedera's Smart Contract Service. EVM compatibility with Hedera's performance.
28 min

What You'll Learn

  • HSCS architecture
  • EVM on Hedera

What You'll Do

  • Deploy Solidity contract
  • Interact via SDK
  • BREAK IT — gas limit error
10
Token Compliance & Custom Fees
Freeze, KYC, wipe, and custom fee schedules. Enterprise compliance at the token level.
30 min

What You'll Learn

  • Compliance flags
  • Custom fee schedules

What You'll Do

  • Configure KYC and freeze
  • Set up fractional and royalty fees
11
Scheduled Transactions (HSS)
Schedule transactions for future execution. Multi-party approval flows.
28 min

What You'll Learn

  • Scheduled transaction mechanics
  • Multi-party signing

What You'll Do

  • Schedule a transaction
  • Collect signatures and execute
12
Mirror Node & Data Queries
Query historical data, balances, and transaction records from Hedera's mirror node REST API.
29 min

What You'll Learn

  • Mirror node REST API
  • Historical data queries

What You'll Do

  • Query transactions and tokens
  • Build data pipeline
13
Cross-Service Integration
Combine HTS, HCS, HSCS, and HSS into a cohesive enterprise application.
28 min

What You'll Learn

  • Service composition patterns
  • End-to-end application flow

What You'll Do

  • Build integrated workflow
  • Connect all services
14
Production Key Management
Threshold keys, key rotation, and security patterns for enterprise Hedera deployment.
30 min

What You'll Learn

  • Threshold key architecture
  • Key rotation

What You'll Do

  • Implement threshold keys
  • Production checklist
15
Internals: How the Ledger Works
Event ordering, state proofs, record files, and MainNet deployment.
30 min

What You'll Learn

  • Hashgraph internals
  • State proof verification

What You'll Do

  • Inspect event ordering
  • Deploy to TestNet
Live Sandbox

Try Hedera in your browser
— no install required

Spin up a Hedera environment directly in your browser. Create tokens, submit consensus messages, and deploy contracts — all from a single tab.

Launch Sandbox →
Pricing

Start your Hedera apprenticeship.
7 days free on every tier.

Start with a free trial — full access to your chosen tier for 7 days. Cancel anytime. Annual plans save 2 months.

Apprentice
$15/mo
or $150/year (save $30) · 1 chain
  • 1 blockchain codex of your choice
  • All modules — full curriculum
  • Cloud progress tracking
  • Completion certificates
  • GitHub portfolio scaffold
  • All curriculum updates
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Practitioner
$30/mo
or $300/year (save $60) · 3 chains
  • 3 blockchain codexes of your choice
  • Everything in Apprentice
  • Voice Pro (ElevenLabs, OpenAI, Google)
  • ChainKit Dashboard
  • Community rank
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Master
$50/mo
or $500/year (save $100) · all 6 chains
  • All 6 blockchain codexes
  • Everything in Practitioner
  • Live Sandbox environment
  • Priority support
  • Early access to new chains
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The Hedera lore is waiting
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16 modules. One real project. Every error explained. Start your free trial today.

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Related Chains

Continue your apprenticeship

The XRPL Codex

Both Hedera and XRPL are enterprise-focused with predictable fees and governed networks. XRPL's permissioned DEX and MPTokens complement Hedera's HTS and HCS.

Explore XRPL →
The Algorand Codex

Like Hedera, Algorand achieves instant finality with a unique consensus. Compare Hashgraph aBFT to Pure Proof-of-Stake for a deep understanding of enterprise consensus.

Explore Algorand →