@abi.encodePacked

ABI non-standard packed encoding, matching Solidity's abi.encodePacked.

On-chain (@abi.encodePacked!): Live values are cut to their packed width and live string/bytes values pass through whole, any number per call; the type list, arrays and tuples stay constant.

Returns: bytes

Syntax

@abi.encodePacked(types ...values)

Arguments

Name	Type	Description
types	string	Comma-separated Solidity types (e.g. "address,uint256")
[...values]	any	Values to encode, one per type

Examples

# Pack an address and amount
set $packed @abi.encodePacked("address,uint256" @me 1e18)
print $packed

On-chain face (@abi.encodePacked!)

Packed encoding is pure composition over byte concatenation, so the face is one concat call: constants encode at composition time and merge into single hex runs, each live word value is cut to its packed width through one slice (an address to its 20 bytes, a uint64 to 8, a full-width word passes whole), and a live string/bytes value contributes its decoded payload raw. The type list, array and tuple values must be constants; any number of values may be live, since the core's gather resolves each part exactly once into the bytes[] concat consumes. All-constant calls fold to the plain face's exact bytes at composition.

See Also

• @abi.encode — standard ABI encoding
• @abi.encodeCall — ABI-encode a function call
• @abi.decode — decode ABI-encoded data