Node multi sessions

go.mod

@@ -5,7 +5,7 @@ go 1.19
 require (
 	github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20221202181307-76fa05c21b12
 	github.com/google/uuid v1.3.1
-	github.com/hashicorp/golang-lru/v2 v2.0.6
+	github.com/hashicorp/golang-lru/v2 v2.0.7
 	github.com/mr-tron/base58 v1.2.0
 	github.com/nspcc-dev/hrw v1.0.9
 	github.com/nspcc-dev/neo-go v0.102.0

go.sum

@@ -9,13 +9,21 @@ github.com/Microsoft/hcsshim v0.11.0 h1:7EFNIY4igHEXUdj1zXgAyU3fLc7QfOKHbkldRVTB
 github.com/Microsoft/hcsshim v0.11.0/go.mod h1:OEthFdQv/AD2RAdzR6Mm1N1KPCztGKDurW1Z8b8VGMM=
 github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20221202181307-76fa05c21b12 h1:npHgfD4Tl2WJS3AJaMUi5ynGDPUBfkg3U3fCzDyXZ+4=
 github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20221202181307-76fa05c21b12/go.mod h1:pSwJ0fSY5KhvocuWSx4fz3BA8OrA1bQn+K1Eli3BRwM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
 github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
+github.com/checkpoint-restore/go-criu/v5 v5.3.0/go.mod h1:E/eQpaFtUKGOOSEBZgmKAcn+zUUwWxqcaKZlF54wK8E=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/containerd/aufs v1.0.0/go.mod h1:kL5kd6KM5TzQjR79jljyi4olc1Vrx6XBlcyj3gNv2PU=
+github.com/containerd/console v1.0.3/go.mod h1:7LqA/THxQ86k76b8c/EMSiaJ3h1eZkMkXar0TQ1gf3U=
 github.com/containerd/containerd v1.7.6 h1:oNAVsnhPoy4BTPQivLgTzI9Oleml9l/+eYIDYXRCYo8=
 github.com/containerd/containerd v1.7.6/go.mod h1:SY6lrkkuJT40BVNO37tlYTSnKJnP5AXBc0fhx0q+TJ4=
+github.com/containerd/go-runc v1.0.0/go.mod h1:cNU0ZbCgCQVZK4lgG3P+9tn9/PaJNmoDXPpoJhDR+Ok=
+github.com/containerd/typeurl v1.0.2/go.mod h1:9trJWW2sRlGub4wZJRTW83VtbOLS6hwcDZXTn6oPz9s=
 github.com/cpuguy83/dockercfg v0.3.1 h1:/FpZ+JaygUR/lZP2NlFI2DVfrOEMAIKP5wWEJdoYe9E=
 github.com/cpuguy83/dockercfg v0.3.1/go.mod h1:sugsbF4//dDlL/i+S+rtpIWp+5h0BHJHfjj5/jFyUJc=
 github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=
+github.com/cyphar/filepath-securejoin v0.2.3/go.mod h1:aPGpWjXOXUn2NCNjFvBE6aRxGGx79pTxQpKOJNYHHl4=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -28,12 +36,16 @@ github.com/docker/docker v24.0.6+incompatible h1:hceabKCtUgDqPu+qm0NgsaXf28Ljf4/
 github.com/docker/docker v24.0.6+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
+github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c/go.mod h1:Uw6UezgYA44ePAFQYUehOuCzmy5zmg/+nl2ZfMWGkpA=
+github.com/docker/go-metrics v0.0.1/go.mod h1:cG1hvH2utMXtqgqqYE9plW6lDxS3/5ayHzueweSI3Vw=
 github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
 github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-ole/go-ole v1.2.6 h1:/Fpf6oFPoeFik9ty7siob0G6Ke8QvQEuVcuChpwXzpY=
 github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
+github.com/golang/mock v1.6.0/go.mod h1:p6yTPP+5HYm5mzsMV8JkE6ZKdX+/wYM6Hr+LicevLPs=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
@@ -43,30 +55,40 @@ github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
 github.com/google/uuid v1.3.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
 github.com/hashicorp/golang-lru v1.0.2 h1:dV3g9Z/unq5DpblPpw+Oqcv4dU/1omnb4Ok8iPY6p1c=
 github.com/hashicorp/golang-lru v1.0.2/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
 github.com/hashicorp/golang-lru/v2 v2.0.6 h1:3xi/Cafd1NaoEnS/yDssIiuVeDVywU0QdFGl3aQaQHM=
 github.com/hashicorp/golang-lru/v2 v2.0.6/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
+github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
+github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.16.7 h1:2mk3MPGNzKyxErAw8YaohYh69+pa4sIQSC0fPGCFR9I=
 github.com/klauspost/compress v1.16.7/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
 github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/linuxkit/virtsock v0.0.0-20201010232012-f8cee7dfc7a3/go.mod h1:3r6x7q95whyfWQpmGZTu3gk3v2YkMi05HEzl7Tf7YEo=
 github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 h1:6E+4a0GO5zZEnZ81pIr0yLvtUWk2if982qA3F3QD6H4=
 github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0/go.mod h1:zJYVVT2jmtg6P3p1VtQj7WsuWi/y4VnjVBn7F8KPB3I=
 github.com/magiconair/properties v1.8.7 h1:IeQXZAiQcpL9mgcAe1Nu6cX9LLw6ExEHKjN0VQdvPDY=
 github.com/magiconair/properties v1.8.7/go.mod h1:Dhd985XPs7jluiymwWYZ0G4Z61jb3vdS329zhj2hYo0=
+github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/moby/locker v1.0.1/go.mod h1:S7SDdo5zpBK84bzzVlKr2V0hz+7x9hWbYC/kq7oQppc=
 github.com/moby/patternmatcher v0.5.0 h1:YCZgJOeULcxLw1Q+sVR636pmS7sPEn1Qo2iAN6M7DBo=
 github.com/moby/patternmatcher v0.5.0/go.mod h1:hDPoyOpDY7OrrMDLaYoY3hf52gNCR/YOUYxkhApJIxc=
 github.com/moby/sys/sequential v0.5.0 h1:OPvI35Lzn9K04PBbCLW0g4LcFAJgHsvXsRyewg5lXtc=
 github.com/moby/sys/sequential v0.5.0/go.mod h1:tH2cOOs5V9MlPiXcQzRC+eEyab644PWKGRYaaV5ZZlo=
 github.com/moby/term v0.5.0 h1:xt8Q1nalod/v7BqbG21f8mQPqH+xAaC9C3N3wfWbVP0=
 github.com/moby/term v0.5.0/go.mod h1:8FzsFHVUBGZdbDsJw/ot+X+d5HLUbvklYLJ9uGfcI3Y=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/mr-tron/base58 v1.2.0 h1:T/HDJBh4ZCPbU39/+c3rRvE0uKBQlU27+QI8LJ4t64o=
 github.com/mr-tron/base58 v1.2.0/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
+github.com/mrunalp/fileutils v0.5.0/go.mod h1:M1WthSahJixYnrXQl/DFQuteStB1weuxD2QJNHXfbSQ=
 github.com/nspcc-dev/hrw v1.0.9 h1:17VcAuTtrstmFppBjfRiia4K2wA/ukXZhLFS8Y8rz5Y=
 github.com/nspcc-dev/hrw v1.0.9/go.mod h1:l/W2vx83vMQo6aStyx2AuZrJ+07lGv2JQGlVkPG06MU=
 github.com/nspcc-dev/neo-go v0.102.0 h1:O2Gt4JPOWmp0c+PnPWwd2wPI74BKSwkaNCEyvyQTWJw=
@@ -92,16 +114,20 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c h1:ncq/mPwQF4JjgDlrVEn3C11VoGHZN7m8qihwgMEtzYw=
 github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c/go.mod h1:OmDBASR4679mdNQnz2pUhc2G8CO2JrUAVFDRBDP/hJE=
 github.com/rogpeppe/go-internal v1.8.1 h1:geMPLpDpQOgVyCg5z5GoRwLHepNdb71NXb67XFkP+Eg=
+github.com/seccomp/libseccomp-golang v0.9.2-0.20220502022130-f33da4d89646/go.mod h1:JA8cRccbGaA1s33RQf7Y1+q9gHmZX1yB/z9WDN1C6fg=
 github.com/shirou/gopsutil/v3 v3.23.7 h1:C+fHO8hfIppoJ1WdsVm1RoI0RwXoNdfTK7yWXV0wVj4=
 github.com/shirou/gopsutil/v3 v3.23.7/go.mod h1:c4gnmoRC0hQuaLqvxnx1//VXQ0Ms/X9UnJF8pddY5z4=
 github.com/shoenig/go-m1cpu v0.1.6 h1:nxdKQNcEB6vzgA2E2bvzKIYRuNj7XNJ4S/aRSwKzFtM=
 github.com/shoenig/go-m1cpu v0.1.6/go.mod h1:1JJMcUBvfNwpq05QDQVAnx3gUHr9IYF7GNg9SUEw2VQ=
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+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
 github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0bLI=
 github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/stefanberger/go-pkcs11uri v0.0.0-20201008174630-78d3cae3a980/go.mod h1:AO3tvPzVZ/ayst6UlUKUv6rcPQInYe3IknH3jYhAKu8=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -111,16 +137,19 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
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+github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
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 github.com/testcontainers/testcontainers-go v0.24.1/go.mod h1:MGBiAkCm86yXQoCiipmQCqZLVdk1uFqtMqaU1Or0MRk=
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+github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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 github.com/yusufpapurcu/wmi v1.2.3 h1:E1ctvB7uKFMOJw3fdOW32DwGE9I7t++CRUEMKvFoFiw=
 github.com/yusufpapurcu/wmi v1.2.3/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
+go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1/go.mod h1:SNgMg+EgDFwmvSmLRTNKC5fegJjB7v23qTQ0XLGUNHk=
 go.uber.org/goleak v1.2.0 h1:xqgm/S+aQvhWFTtR0XK3Jvg7z8kGV8P4X14IzwN3Eqk=
 go.uber.org/multierr v1.10.0 h1:S0h4aNzvfcFsC3dRF1jLoaov7oRaKqRGC/pUEJ2yvPQ=
 go.uber.org/multierr v1.10.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
@@ -183,6 +212,9 @@ google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs
 google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
+gopkg.in/square/go-jose.v2 v2.5.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pool/cache.go

@@ -72,3 +72,8 @@ func (c *sessionCache) expired(val *cacheValue) bool {
 	epoch := atomic.LoadUint64(&c.currentEpoch)
 	return val.token.ExpiredAt(epoch + 1)
 }
+
+// Purge removes all session keys.
+func (c *sessionCache) Purge() {
+	c.cache.Purge()
+}

pool/mock_test.go

@@ -241,9 +241,12 @@ func (m *mockClient) getRawClient() (*client.Client, error) {
 	return nil, errors.New("now supported to return sdkClient from mockClient")
 }
 
-func (m *mockClient) SetNodeSession(*session.Object) {
+func (m *mockClient) SetNodeSession(*session.Object, neofscrypto.PublicKey) {
 }
 
-func (m *mockClient) GetNodeSession() *session.Object {
+func (m *mockClient) GetNodeSession(neofscrypto.PublicKey) *session.Object {
 	return nil
 }
+
+func (m *mockClient) ResetSessions() {
+}

pool/pool.go

@@ -30,6 +30,8 @@ import (
 const (
 	// max GRPC message size.
 	defaultBufferSize = 4194304 // 4MB
+
+	defaultNodeSessionCacheSize = 100
 )
 
 type sdkClientInterface interface {
@@ -67,12 +69,13 @@ type sdkClientWrapper struct {
 	addr        string
 }
 
-// nodeSessionContainer represents storage for a session token. It contains only basics session info: id, pub key, expiration.
-// This token is used for the final session tokens creation for specific verb. This token is 1:1 for each node.
+// nodeSessionContainer represents storage for a session tokens. It contains only basics session info: id, pub key, expiration.
+// This tokens are used for the final session tokens creation for specific verb. This token is 1:1 for each public key in the node.
 // Should be stored until token not expired.
 type nodeSessionContainer interface {
-	SetNodeSession(*session.Object)
-	GetNodeSession() *session.Object
+	SetNodeSession(*session.Object, neofscrypto.PublicKey)
+	GetNodeSession(neofscrypto.PublicKey) *session.Object
+	ResetSessions()
 }
 
 // client represents virtual connection to the single NeoFS network endpoint from which Pool is formed.
@@ -142,8 +145,7 @@ type clientWrapper struct {
 	clientStatusMonitor
 	statisticCallback stat.OperationCallback
 
-	nodeSessionMutex sync.RWMutex
-	nodeSession      *session.Object
+	nodeSessionCache *sessionCache
 
 	epoch atomic.Uint64
 }
@@ -158,6 +160,7 @@ type wrapperPrm struct {
 	responseInfoCallback func(sdkClient.ResponseMetaInfo) error
 	statisticCallback    stat.OperationCallback
 	buffers              *sync.Pool
+	nodeSessionCacheSize int
 }
 
 // setAddress sets endpoint to connect in NeoFS network.
@@ -201,6 +204,11 @@ func (x *wrapperPrm) setBuffers(buffers *sync.Pool) {
 	x.buffers = buffers
 }
 
+// SetNodeSessionCacheSize sets cache size for the basic sessions for node.
+func (x *wrapperPrm) setNodeSessionCacheSize(cacheSize int) {
+	x.nodeSessionCacheSize = cacheSize
+}
+
 // getNewClient returns a new [sdkClient.Client] instance using internal parameters.
 func (x *wrapperPrm) getNewClient(statisticCallback stat.OperationCallback) (*sdkClient.Client, error) {
 	var prmInit sdkClient.PrmInit
@@ -213,16 +221,28 @@ func (x *wrapperPrm) getNewClient(statisticCallback stat.OperationCallback) (*sd
 
 // newWrapper creates a clientWrapper that implements the client interface.
 func newWrapper(prm wrapperPrm) (*clientWrapper, error) {
+	cacheSize := prm.nodeSessionCacheSize
+	if cacheSize == 0 {
+		cacheSize = defaultNodeSessionCacheSize
+	}
+
+	cache, err := newCache(cacheSize)
+	if err != nil {
+		return nil, fmt.Errorf("cacheNodeSessions: %w", err)
+	}
+
 	res := &clientWrapper{
 		clientStatusMonitor: newClientStatusMonitor(prm.address, prm.errorThreshold),
 		statisticCallback:   prm.statisticCallback,
+		nodeSessionCache:    cache,
 	}
 
 	oldCallBack := prm.responseInfoCallback
 	prm.setResponseInfoCallback(func(info sdkClient.ResponseMetaInfo) error {
 		newEpoch := info.Epoch()
 		if newEpoch > res.epoch.Load() {
 			res.epoch.Store(newEpoch)
+			cache.updateEpoch(newEpoch)
 		}
 
 		if oldCallBack != nil {
@@ -330,26 +350,25 @@ func (c *clientWrapper) getRawClient() (*sdkClient.Client, error) {
 	return nil, errPoolClientUnhealthy
 }
 
-func (c *clientWrapper) SetNodeSession(token *session.Object) {
-	c.nodeSessionMutex.Lock()
-	c.nodeSession = token
-	c.nodeSessionMutex.Unlock()
+func (c *clientWrapper) nodeSessionKey(pubKey neofscrypto.PublicKey) string {
+	return string(neofscrypto.PublicKeyBytes(pubKey))
 }
 
-func (c *clientWrapper) GetNodeSession() *session.Object {
-	c.nodeSessionMutex.RLock()
-	defer c.nodeSessionMutex.RUnlock()
+func (c *clientWrapper) SetNodeSession(token *session.Object, pubKey neofscrypto.PublicKey) {
+	c.nodeSessionCache.Put(c.nodeSessionKey(pubKey), *token)
+}
 
-	if c.nodeSession == nil {
-		return nil
+func (c *clientWrapper) GetNodeSession(pubKey neofscrypto.PublicKey) *session.Object {
+	tok, ok := c.nodeSessionCache.Get(c.nodeSessionKey(pubKey))
+	if ok {
+		return &tok
 	}
 
-	if c.nodeSession.ExpiredAt(c.epoch.Load() + 1) {
-		return nil
-	}
+	return nil
+}
 
-	token := *c.nodeSession
-	return &token
+func (c *clientWrapper) ResetSessions() {
+	c.nodeSessionCache.Purge()
 }
 
 func (c *clientStatusMonitor) isHealthy() bool {
@@ -433,6 +452,7 @@ type InitParameters struct {
 	sessionExpirationDuration uint64
 	errorThreshold            uint32
 	nodeParams                []NodeParam
+	nodeSessionCacheSize      int
 
 	clientBuilder clientBuilder
 
@@ -506,6 +526,11 @@ func (x *InitParameters) SetStatisticCallback(statisticCallback stat.OperationCa
 	x.statisticCallback = statisticCallback
 }
 
+// SetNodeSessionCacheSize sets cache size for the basic sessions for node.
+func (x *InitParameters) SetNodeSessionCacheSize(cacheSize int) {
+	x.nodeSessionCacheSize = cacheSize
+}
+
 type rebalanceParameters struct {
 	nodesParams               []*nodesParam
 	nodeRequestTimeout        time.Duration
@@ -805,6 +830,7 @@ func fillDefaultInitParams(params *InitParameters, cache *sessionCache, statisti
 			})
 			prm.setStatisticCallback(statisticCallback)
 			prm.setBuffers(buffers)
+			prm.setNodeSessionCacheSize(params.nodeSessionCacheSize)
 			return newWrapper(prm)
 		})
 	}
@@ -902,7 +928,7 @@ func (p *Pool) updateInnerNodesHealth(ctx context.Context, i int, bufferWeights
 			} else {
 				bufferWeights[j] = 0
 				p.cache.DeleteByPrefix(cli.address())
-				cli.SetNodeSession(nil)
+				cli.ResetSessions()
 			}
 
 			if changed {
@@ -981,7 +1007,7 @@ func (p *Pool) checkSessionTokenErr(err error, address string, cl nodeSessionCon
 
 	if errors.Is(err, apistatus.ErrSessionTokenNotFound) || errors.Is(err, apistatus.ErrSessionTokenExpired) {
 		p.cache.DeleteByPrefix(address)
-		cl.SetNodeSession(nil)
+		cl.ResetSessions()
 	}
 }
 

pool/session.go

@@ -19,7 +19,7 @@ var (
 )
 
 func initSession(ctx context.Context, c *sdkClientWrapper, dur uint64, signer user.Signer) (session.Object, error) {
-	tok := c.nodeSession.GetNodeSession()
+	tok := c.nodeSession.GetNodeSession(signer.Public())
 	if tok != nil {
 		return *tok, nil
 	}
@@ -62,7 +62,7 @@ func initSession(ctx context.Context, c *sdkClientWrapper, dur uint64, signer us
 	dst.SetAuthKey(&key)
 	dst.SetExp(exp)
 
-	c.nodeSession.SetNodeSession(&dst)
+	c.nodeSession.SetNodeSession(&dst, signer.Public())
 
 	return dst, nil
 }