@assertions:split!

Split the string return of a call on a delimiter and select one segment, on-chain. A negative index counts from the end (-1 = last segment).

Returns: string

Syntax

@assertions:split!(call delimiter index)

Arguments

Name	Type	Description
call	address	A :: call expression (or chain) returning a string
delimiter	string	Exact, non-empty byte sequence to split on
index	number	Segment index to select: zero-based from the start, negative from the end (-1 = last)

Examples

load assertions

set $pool 0x44fA8E6f47987339850636F88629646662444217

# "Uniswap LP Token" -> segment 1 is "LP"
assertions:assert @split!($pool::{name()(string)} " " 1) == "LP"

# The name ends with "Token": negative index counts from the end, on-chain
assertions:assert @split!($pool::{name()(string)} " " -1) == "Token"

Notes

• Splits on the exact byte sequence; adjacent delimiters produce empty segments and an out-of-range index (in either direction) reverts with SegmentIndexOutOfBounds.
• Negative indices resolve against the segment count at assertion time, so -1 is the last segment however many the live value has.
• String-valued: compare with ==/!=. At the top level the core judges the string directly; nested inside @bool! the comparison compiles to an on-chain keccak comparison of the two sides.

See Also

• assertions:assert, @assertions:hash!