Data Ergonomics - c8ntinuum Docs

Data ergonomics precompiles help contracts work with structured payloads and repeated address data. They are not core consensus concepts, but they can reduce glue code and make cross-domain applications easier to build.

Surfaces

Surface	Address	Use it for
JSON	`0x0000000000000000000000000000000000000701`	Reading structured JSON payloads through a native parser.
Address table	`0x0000000000000000000000000000000000000710`	Short-hands for frequently used addresses, reducing repeated calldata in supported flows.
Bech32	`0x0000000000000000000000000000000000000400`	Converting between EVM `0x...` and Cosmos `c8...` address formats.

When to use

Use JSON parsing when structured payloads are part of a protocol boundary and native parsing is safer than brittle byte slicing.
Use address conversion when a contract must translate between EVM and Cosmos account representations.
Use address compression when a protocol passes the same addresses repeatedly: register an address once, after which compress encodes it as its table index and decompress reads it back. The interface is AddressTableI.

Design notes

Concern	Guidance
Canonical encoding	Define the exact payload shape before relying on parser output.
Address UX	Label `0x...`, `c8...`, `c8valoper...`, and `c8valcons...` formats clearly in interfaces.
Failure behavior	Treat parse failure, unknown paths, and unsupported payload shapes as expected error cases.
Reference boundary	Keep exact ABI signatures in Precompile ABI Reference.