SparseCalldataSegmentLib

Git Source

Title: SparseCalldataSegmentLib

Authors: David Dada <daveproxy80@gmail.com> (https://github.com/dadadave80), Modified from ERC-6900 reference implementation (https://github.com/erc6900/reference-implementation)

Reads an ERC-6900 sparse-segment signature/authorization blob: a sequence of [uint8 index][uint32 length][length bytes body] per-hook segments, in strictly increasing index order (a hook with no data is OMITTED, never zero-length), terminated by a final [0xFF][raw bytes …] segment (no length prefix) carrying the validation function's own signature.

distribute per-hook signature data.

Functions

getIndex

The leading index byte of source (which hook/segment it belongs to, or 0xFF for the final).

function getIndex(bytes calldata source) internal pure returns (uint8);

Parameters

Returns

getNextSegment

Splits off the leading length-prefixed segment body, returning it and the remaining blob.

function getNextSegment(bytes calldata source)
        internal
        pure
        returns (bytes calldata body, bytes calldata remainder);

Parameters

Returns

advanceSegmentIfAtIndex

If the leading segment's index equals index, returns its body + the remaining blob (advancing the cursor); if it is greater, returns an empty body and the unchanged blob (this index has no data); if it is smaller, reverts SegmentOutOfOrder.

function advanceSegmentIfAtIndex(bytes calldata source, uint8 index)
        internal
        pure
        returns (bytes calldata body, bytes calldata remainder);

Parameters

Returns

getFinalSegment

The final validation-function segment: requires the reserved 0xFF index marker, returns the rest.

function getFinalSegment(bytes calldata source) internal pure returns (bytes calldata);

Parameters

Returns