  While numerous public blockchain datasets are available, their utility is
constrained by an exclusive focus on blockchain data. This constraint limits
the incorporation of relevant social network data into blockchain analysis,
thereby diminishing the breadth and depth of insight that can be derived. To
address the above limitation, we introduce EX-Graph, a novel dataset that
authentically links Ethereum and X, marking the first and largest dataset of
its kind. EX-Graph combines Ethereum transaction records (2 million nodes and
30 million edges) and X following data (1 million nodes and 3 million edges),
bonding 30,667 Ethereum addresses with verified X accounts sourced from
OpenSea. Detailed statistical analysis on EX-Graph highlights the structural
differences between X-matched and non-X-matched Ethereum addresses. Extensive
experiments, including Ethereum link prediction, wash-trading Ethereum
addresses detection, and X-Ethereum matching link prediction, emphasize the
significant role of X data in enhancing Ethereum analysis. EX-Graph is
available at \url{https://exgraph.deno.dev/}.
