From f8018f9c3d38cdbfc664aee6026bb8abd1acd233 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Mon, 11 Jan 2021 18:14:07 +0300
Subject: [PATCH] [#241] v2/session: Define keys of the well-known X-headers

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 v2/session/grpc/service.pb.go | Bin 21534 -> 21533 bytes
 v2/session/grpc/types.pb.go   | Bin 44074 -> 44980 bytes
 v2/session/xheaders.go        |  16 ++++++++++++++++
 3 files changed, 16 insertions(+)
 create mode 100644 v2/session/xheaders.go

diff --git a/v2/session/grpc/service.pb.go b/v2/session/grpc/service.pb.go
index e18b8f3fc6fb3b53e69bda1b8bd59f09135d5f6d..223c38bc4c07d7df68371d0a58485c704f0f03f2 100644
GIT binary patch
delta 20
ccmbQYf^qH&#tpKfjKP!TL@hRliypTF08BIn<^TWy

delta 22
ecmbQcf^pso#tpKfj4qSqL@gNgHiwBGw*vrH7zYIa

diff --git a/v2/session/grpc/types.pb.go b/v2/session/grpc/types.pb.go
index fe557fd0e23cf1f3c2aeffe81e879d1eee72a0f5..aba3cebc9bbcb05aa19764dffed125c2eccbdfd6 100644
GIT binary patch
delta 927
zcmb_ay>1gh5SCI>(WV=vv4pTgfe@lY;0P3ATZuzMr1N@r&bN4P_ShertL`0m3@W7L
zJ!t886=wJ1lYk0|;-uBh%=b6*^~cfO&!cZQ#~oaV7Nn&hG=ZQNqDMDYSZYEA6$*vU
zKR7*wU}24*DWGc{1}<72Xd0uX2%6spcW5Tun!3-i1rjwv9eqfHk@TmCuoFfrxL%%(
zpMwuhceI(ndttaF1&wkm)=g+9aEUzNg9qyp;wAdVl1C4F9V$?<XC6dmy3~9S-S=g%
zM9WzG#~2oq;MlU)3OmODnzF2e_GN_*LGb4-J2=^+G2<=SJ)I2LJ_r{yZF-VbQOu_E
zv#X+50f$rS&k!mR5|1cLlmUF}1J=x4iJi95z2I6ZcaLD0olTb)FBiphF@N<2Zc-Is
zhM^V>U}I&KR>0eVl0Dk>#{}CLA+bgZoSu=<<V{R~9l$DkUV-*GXxj9ENYX0yyo$Wa
zXHPqBAW$fEElkqx8SEbAZ3!MjVjVphrC`aj5e$#nT+R?cM&}ZHug{Wc4;d$=DkTbk
zJA5~vpI<ME*VDza8=NxRy{X|4N*hTrP|Eo?rjZBA!6Yecus>5Uy4E2dD?nxUP^Wut
n1Rr45=V2}6Hi>5^Djytl#@cOc{w1>in%KiXBfI@@{Qb)>V5K{N

delta 26
icmdmTpJ~+%rVTNY>|7<41*r-Vlh-S?ZZ48_ngjro&kBhE

diff --git a/v2/session/xheaders.go b/v2/session/xheaders.go
new file mode 100644
index 00000000..64b16dee
--- /dev/null
+++ b/v2/session/xheaders.go
@@ -0,0 +1,16 @@
+package session
+
+// ReservedXHeaderPrefix is a prefix of keys to "well-known" X-headers.
+const ReservedXHeaderPrefix = "__NEOFS__"
+
+const (
+	// XHeaderNetmapEpoch is a key to the reserved X-header that specifies netmap epoch
+	// to use for object placement calculation. If set to '0' or not set, the current
+	// epoch only will be used.
+	XHeaderNetmapEpoch = ReservedXHeaderPrefix + "NETMAP_EPOCH"
+
+	// XHeaderNetmapLookupDepth is a key to the reserved X-header that limits
+	// how many past epochs back the node will can lookup. If set to '0' or not
+	// set, the current epoch only will be used.
+	XHeaderNetmapLookupDepth = ReservedXHeaderPrefix + "NETMAP_LOOKUP_DEPTH"
+)