By　sharing　resources　between　edge　servers　and　end　users,　edge-end　cooperation　is　one　important　way　to　support　various　applications　in　Internet　of　Things,　which　have　critical　resource　requirements　on　computing,　storage,　or　bandwidth.　How　to　price　these　resources　and　how　to　evaluate　the　service　quality　of　edge　servers　are　two　key　issues　to　support　trusted　resource　allocation　for　blockchain-enabled　Internet　of　Things.　In　this　article,　we　provide　a　trusted　resource　allocation　mechanism　based　on　smart　contracts,　in　which　a　group-buying　pricing　mechanism　(GBPM)　and　a　reputation　evaluation　mechanism　(REM)　are　proposed　to　effectively　address　the　problems　existing　in　resources　pricing　and　service　quality　evaluation　of　edge　servers.　In　the　trusted　resource　allocation　mechanism,　end　users　can　choose　a　purchase　mode　from　four　pricing　schemes　in　terms　of　actual　demands　on　delay　and　price,　and　smart　contracts　can　match　end　users　with　high-reputation　edge　servers　automatically.　Moreover,　end　users　can　submit　reputation　evaluations　to　smart　contracts　based　on　the　behaviors　of　edge　servers.　Simulation　results　show　the　GBPM　can　provide　differentiated　prices　and　optimize　the　utility　of　end　users　accordingly,　while　the　REM　is　more　sensitive　to　edge　servers　with　irregular　behaviors　and　quickly　reduces　their　reputations　so　that　the　success　rate　of　transactions　is　improved.