spec.pdc

---
title: The Interblockchain Communication Protocol
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author: IBC Specification Team
date: \today \ — \textbf{1.0.0-rc5}
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# Architectural Overview

!include ibc/1_IBC_TERMINOLOGY.md.xfm

!include ibc/2_IBC_ARCHITECTURE.md.xfm

!include ibc/3_IBC_DESIGN_PRINCIPLES.md.xfm

# ICS 001 - ICS Standard

!include spec/ics-001-ics-standard/README.md.xfm

# ICS 023 - Vector Commitments

!include spec/ics-023-vector-commitments/README.md.xfm

# ICS 024 - Host Requirements

!include spec/ics-024-host-requirements/README.md.xfm

# ICS 002 - Client Semantics

!include spec/ics-002-client-semantics/README.md.xfm

# ICS 003 - Connection Semantics

!include spec/ics-003-connection-semantics/README.md.xfm

# ICS 005 - Port Allocation

!include spec/ics-005-port-allocation/README.md.xfm

# ICS 004 - Channel & Packet Semantics

!include spec/ics-004-channel-and-packet-semantics/README.md.xfm

# ICS 025 - Handler Interface

!include spec/ics-025-handler-interface/README.md.xfm

# ICS 026 - Routing Module

!include spec/ics-026-routing-module/README.md.xfm

# ICS 018 - Relayer Algorithms

!include spec/ics-018-relayer-algorithms/README.md.xfm

# ICS 020 - Fungible Token Transfer

!include spec/ics-020-fungible-token-transfer/README.md.xfm

# ICS 027 - Interchain Accounts

!include spec/ics-027-interchain-accounts/README.md.xfm

# ICS 006 - Solo Machine Client

!include spec/ics-006-solo-machine-client/README.md.xfm

# ICS 007 - Tendermint Client

!include spec/ics-007-tendermint-client/README.md.xfm

# ICS 010 - GRANDPA Client

!include spec/ics-010-grandpa-client/README.md.xfm

# Appendix A: Use-case Descriptions

!include ibc/4_IBC_USECASES.md.xfm

# Appendix B: Design Patterns

!include ibc/5_IBC_DESIGN_PATTERNS.md.xfm

# Appendix C: Canonical Encoding

!include ibc/CANONICAL_ENCODING.md.xfm

# Appendix D: Frequently-Asked Questions

!include ibc/6_IBC_FAQ.md.xfm