The components of XChain

A platform of independent, open-source services; each does one job well, and together they turn any blockchain into a programmable token economy.

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The big picture

How they fit together

Users and apps on top, the core services in the middle, the ledger underneath, fed by the blockchain. Click any service or the wallet to dive in.

Each box links to that component. Apps & the wallet build on the SDK (exchanging data both ways); the encoder & explorer feed data up into it, and it talks to the blockchain (UTXOs flow from the utxo-tracker into the encoder). The blockchain feeds the decoder & utxo-tracker. The decoder writes to the database ledger, the indexer reads & writes it, and the explorer reads from it. (node, regtest-miner & e2e-test tooling not shown.)

The services

The open-source services documented here, grouped by the job each one does. The full platform roster is in the documentation, which also covers the MIT-licensed contract template library.

Core pipeline

xchain-decoder

Reads the blockchain and extracts XChain transactions.

xchain-indexer

Validates every ACTION and maintains all token, DEX, and contract state.

xchain-explorer

REST + JSON-RPC APIs and a web block explorer.

Transaction creation

xchain-encoder

Turns an ACTION into a ready-to-sign transaction.

xchain-utxo-tracker

Indexes UTXOs and serves balance and coin-selection queries.

xchain-sdk

The developer SDK: the front door for builders.

Coordination

xchain-hub

The decentralized validator network: oracle, attestation, and governance.

Replication

xchain-sync

Replicates the chain so anyone can verify it independently.

Execution

xchain-vm

The sandboxed smart-contract engine.

Client

xchain-wallet

The self-custodial reference wallet: web, extension & desktop.

Operator tooling

xchain-node

One command to install and run the entire platform.

xchain-regtest-miner

Auto-mines blocks for instant local development.

xchain-e2e-test

Full-stack tests that exercise the whole platform together.