feat(graph): detect negative-weight edges in PaymentGraphChecker (#773) - #823
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feat(graph): detect negative-weight edges in PaymentGraphChecker (#773)#823ZacLou wants to merge 1 commit into
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…llar-split#773) - Add GraphValidationError for graph-level validation failures - check() now validates all recipient amounts before path-finding - Throws GraphValidationError naming source, target, and amount - Zero-weight edges remain allowed - Add unit tests for negative amount, error message, and valid graphs Closes Stellar-split#773
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Prevents unbounded fund extraction by rejecting payment graphs with negative recipient amounts before path-finding begins.
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Closes #773