Remove event building duplication & push to GMSL (#3056)

Removes event building duplication and moves the funcionality into GMSL
since all the sub-steps are already there.

clientapi/routing/createroom.go

@@ -448,7 +448,7 @@ func createRoom(
 			builder.PrevEvents = []gomatrixserverlib.EventReference{builtEvents[i-1].EventReference()}
 		}
 		var ev *gomatrixserverlib.Event
-		ev, err = buildEvent(&builder, userDomain, &authEvents, cfg, evTime, roomVersion)
+		ev, err = builder.AddAuthEventsAndBuild(userDomain, &authEvents, evTime, roomVersion, cfg.Matrix.KeyID, cfg.Matrix.PrivateKey)
 		if err != nil {
 			util.GetLogger(ctx).WithError(err).Error("buildEvent failed")
 			return jsonerror.InternalServerError()
@@ -599,31 +599,3 @@ func createRoom(
 		JSON: response,
 	}
 }
-
-// buildEvent fills out auth_events for the builder then builds the event
-func buildEvent(
-	builder *gomatrixserverlib.EventBuilder,
-	serverName gomatrixserverlib.ServerName,
-	provider gomatrixserverlib.AuthEventProvider,
-	cfg *config.ClientAPI,
-	evTime time.Time,
-	roomVersion gomatrixserverlib.RoomVersion,
-) (*gomatrixserverlib.Event, error) {
-	eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
-	if err != nil {
-		return nil, err
-	}
-	refs, err := eventsNeeded.AuthEventReferences(provider)
-	if err != nil {
-		return nil, err
-	}
-	builder.AuthEvents = refs
-	event, err := builder.Build(
-		evTime, serverName, cfg.Matrix.KeyID,
-		cfg.Matrix.PrivateKey, roomVersion,
-	)
-	if err != nil {
-		return nil, fmt.Errorf("cannot build event %s : Builder failed to build. %w", builder.Type, err)
-	}
-	return event, nil
-}

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/matrix-org/dugong v0.0.0-20210921133753-66e6b1c67e2e
 	github.com/matrix-org/go-sqlite3-js v0.0.0-20220419092513-28aa791a1c91
 	github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530
-	github.com/matrix-org/gomatrixserverlib v0.0.0-20230414110520-bcb28309fbcf
+	github.com/matrix-org/gomatrixserverlib v0.0.0-20230414140439-3cf4cd94d75f
 	github.com/matrix-org/pinecone v0.11.1-0.20230210171230-8c3b24f2649a
 	github.com/matrix-org/util v0.0.0-20221111132719-399730281e66
 	github.com/mattn/go-sqlite3 v1.14.16
@@ -42,10 +42,10 @@ require (
 	github.com/uber/jaeger-lib v2.4.1+incompatible
 	github.com/yggdrasil-network/yggdrasil-go v0.4.6
 	go.uber.org/atomic v1.10.0
-	golang.org/x/crypto v0.6.0
+	golang.org/x/crypto v0.8.0
 	golang.org/x/image v0.5.0
 	golang.org/x/mobile v0.0.0-20221020085226-b36e6246172e
-	golang.org/x/term v0.5.0
+	golang.org/x/term v0.7.0
 	gopkg.in/h2non/bimg.v1 v1.1.9
 	gopkg.in/yaml.v2 v2.4.0
 	gotest.tools/v3 v3.4.0
@@ -121,12 +121,12 @@ require (
 	github.com/tidwall/pretty v1.2.1 // indirect
 	go.etcd.io/bbolt v1.3.6 // indirect
 	golang.org/x/exp v0.0.0-20221205204356-47842c84f3db // indirect
-	golang.org/x/mod v0.6.0 // indirect
+	golang.org/x/mod v0.8.0 // indirect
-	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/net v0.9.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/sys v0.7.0 // indirect
-	golang.org/x/text v0.7.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
-	golang.org/x/tools v0.2.0 // indirect
+	golang.org/x/tools v0.6.0 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/macaroon.v2 v2.1.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

go.sum

@@ -321,16 +321,8 @@ github.com/matrix-org/go-sqlite3-js v0.0.0-20220419092513-28aa791a1c91 h1:s7fexw
 github.com/matrix-org/go-sqlite3-js v0.0.0-20220419092513-28aa791a1c91/go.mod h1:e+cg2q7C7yE5QnAXgzo512tgFh1RbQLC0+jozuegKgo=
 github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530 h1:kHKxCOLcHH8r4Fzarl4+Y3K5hjothkVW5z7T1dUM11U=
 github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530/go.mod h1:/gBX06Kw0exX1HrwmoBibFA98yBk/jxKpGVeyQbff+s=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230320105331-4dd7ff2f0e3a h1:F6K1i61KcJ8cX/y0Q8/44Dh1w+fpESQd92gq885FDrI=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20230414140439-3cf4cd94d75f h1:sULN+zkwjt9bBy3dy5W98B6J/Pd4xOiF6yjWOBRRKmw=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230320105331-4dd7ff2f0e3a/go.mod h1:7HTbSZe+CIdmeqVyFMekwD5dFU8khWQyngKATvd12FU=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20230414140439-3cf4cd94d75f/go.mod h1:7HTbSZe+CIdmeqVyFMekwD5dFU8khWQyngKATvd12FU=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230405171344-5f597d85ba4f h1:D7IgZA2DxBroqCTxo2uXEmjj8eCI1OzqqKRE4SAgmBU=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230405171344-5f597d85ba4f/go.mod h1:7HTbSZe+CIdmeqVyFMekwD5dFU8khWQyngKATvd12FU=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230406115722-88763372cbd9 h1:bnIeD+u46GkPzfBcH9Su4sUBRZ9jqHcKER8hmaNnGD8=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230406115722-88763372cbd9/go.mod h1:7HTbSZe+CIdmeqVyFMekwD5dFU8khWQyngKATvd12FU=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230406130834-e85c3bfeed05 h1:s4JL2PPTgB6pR1ouDwq6KpqmV5hUTAP+HB1ajlemHWA=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230406130834-e85c3bfeed05/go.mod h1:7HTbSZe+CIdmeqVyFMekwD5dFU8khWQyngKATvd12FU=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230414110520-bcb28309fbcf h1:bfjLsvf1M7IFJuwmFJAsgUi4XaaHs07e6tub0tb3Fpw=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20230414110520-bcb28309fbcf/go.mod h1:7HTbSZe+CIdmeqVyFMekwD5dFU8khWQyngKATvd12FU=
 github.com/matrix-org/pinecone v0.11.1-0.20230210171230-8c3b24f2649a h1:awrPDf9LEFySxTLKYBMCiObelNx/cBuv/wzllvCCH3A=
 github.com/matrix-org/pinecone v0.11.1-0.20230210171230-8c3b24f2649a/go.mod h1:HchJX9oKMXaT2xYFs0Ha/6Zs06mxLU8k6F1ODnrGkeQ=
 github.com/matrix-org/util v0.0.0-20221111132719-399730281e66 h1:6z4KxomXSIGWqhHcfzExgkH3Z3UkIXry4ibJS4Aqz2Y=
@@ -510,8 +502,8 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20210314154223-e6e6c4f2bb5b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.6.0 h1:qfktjS5LUO+fFKeJXZ+ikTRijMmljikvG68fpMMruSc=
+golang.org/x/crypto v0.8.0 h1:pd9TJtTueMTVQXzk8E2XESSMQDj/U7OUu0PqJqPXQjQ=
-golang.org/x/crypto v0.6.0/go.mod h1:OFC/31mSvZgRz0V1QTNCzfAI1aIRzbiufJtkMIlEp58=
+golang.org/x/crypto v0.8.0/go.mod h1:mRqEX+O9/h5TFCrQhkgjo2yKi0yYA+9ecGkdQoHrywE=
 golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20180807140117-3d87b88a115f/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@@ -554,8 +546,8 @@ golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.6.0 h1:b9gGHsz9/HhJ3HF5DHQytPpuwocVTChQJK3AvoLRD5I=
+golang.org/x/mod v0.8.0 h1:LUYupSeNrTNCGzR/hVBk2NHZO4hXcVaW1k4Qx7rjPx8=
-golang.org/x/mod v0.6.0/go.mod h1:4mET923SAdbXp2ki8ey+zGs1SLqsuM2Y0uvdZR/fUNI=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -591,8 +583,8 @@ golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
+golang.org/x/net v0.9.0 h1:aWJ/m6xSmxWBx+V0XRHTlrYrPG56jKsLdTFmsSsCzOM=
-golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.9.0/go.mod h1:d48xBJpPfHeWQsugry2m+kC02ZBRGRgulfHnEXEuWns=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -612,6 +604,7 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -664,12 +657,12 @@ golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20221010170243-090e33056c14/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
+golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0 h1:n2a8QNdAb0sZNpU9R1ALUXBbY+w51fCQDN+7EdxNBsY=
+golang.org/x/term v0.7.0 h1:BEvjmm5fURWqcfbSKTdpkDXYBrUS1c0m8agp14W48vQ=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.7.0/go.mod h1:P32HKFT3hSsZrRxla30E9HqToFYAQPCMs/zFMBUFqPY=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -677,8 +670,9 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -732,8 +726,8 @@ golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4f
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
 golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.2.0 h1:G6AHpWxTMGY1KyEYoAQ5WTtIekUUvDNjan3ugu60JvE=
+golang.org/x/tools v0.6.0 h1:BOw41kyTf3PuCW1pVQf8+Cyg8pMlkYB1oo9iJ6D/lKM=
-golang.org/x/tools v0.2.0/go.mod h1:y4OqIKeOV/fWJetJ8bXPU1sEVniLMIyDAZWeHdV+NTA=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

roomserver/internal/api.go

@@ -160,6 +160,7 @@ func (r *RoomserverInternalAPI) SetFederationAPI(fsAPI fsAPI.RoomserverFederatio
 		Cfg:     &r.Cfg.RoomServer,
 		DB:      r.DB,
 		FSAPI:   r.fsAPI,
+		RSAPI:   r,
 		Inputer: r.Inputer,
 	}
 	r.Publisher = &perform.Publisher{

roomserver/internal/perform/perform_join.go

@@ -35,7 +35,6 @@ import (
 	"github.com/matrix-org/dendrite/roomserver/internal/input"
 	"github.com/matrix-org/dendrite/roomserver/internal/query"
 	"github.com/matrix-org/dendrite/roomserver/storage"
-	"github.com/matrix-org/dendrite/roomserver/types"
 	"github.com/matrix-org/dendrite/setup/config"
 )
 
@@ -305,7 +304,13 @@ func (r *Joiner) performJoinRoomByID(
 	// locally on the homeserver.
 	// TODO: Check what happens if the room exists on the server
 	// but everyone has since left. I suspect it does the wrong thing.
-	event, buildRes, err := buildEvent(ctx, r.DB, r.Cfg.Matrix, userDomain, &eb)
+
+	var buildRes rsAPI.QueryLatestEventsAndStateResponse
+	identity, err := r.Cfg.Matrix.SigningIdentityFor(userDomain)
+	if err != nil {
+		return "", "", fmt.Errorf("error joining local room: %q", err)
+	}
+	event, err := eventutil.QueryAndBuildEvent(ctx, &eb, r.Cfg.Matrix, identity, time.Now(), r.RSAPI, &buildRes)
 
 	switch err {
 	case nil:
@@ -430,46 +435,3 @@ func (r *Joiner) populateAuthorisedViaUserForRestrictedJoin(
 	}
 	return res.AuthorisedVia, nil
 }
-
-func buildEvent(
-	ctx context.Context, db storage.Database, cfg *config.Global,
-	senderDomain gomatrixserverlib.ServerName,
-	builder *gomatrixserverlib.EventBuilder,
-) (*gomatrixserverlib.HeaderedEvent, *rsAPI.QueryLatestEventsAndStateResponse, error) {
-	eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
-	if err != nil {
-		return nil, nil, fmt.Errorf("gomatrixserverlib.StateNeededForEventBuilder: %w", err)
-	}
-
-	if len(eventsNeeded.Tuples()) == 0 {
-		return nil, nil, errors.New("expecting state tuples for event builder, got none")
-	}
-
-	var queryRes rsAPI.QueryLatestEventsAndStateResponse
-	err = helpers.QueryLatestEventsAndState(ctx, db, &rsAPI.QueryLatestEventsAndStateRequest{
-		RoomID:       builder.RoomID,
-		StateToFetch: eventsNeeded.Tuples(),
-	}, &queryRes)
-	if err != nil {
-		switch err.(type) {
-		case types.MissingStateError:
-			// We know something about the room but the state seems to be
-			// insufficient to actually build a new event, so in effect we
-			// had might as well treat the room as if it doesn't exist.
-			return nil, nil, eventutil.ErrRoomNoExists
-		default:
-			return nil, nil, fmt.Errorf("QueryLatestEventsAndState: %w", err)
-		}
-	}
-
-	identity, err := cfg.SigningIdentityFor(senderDomain)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	ev, err := eventutil.BuildEvent(ctx, builder, cfg, identity, time.Now(), &eventsNeeded, &queryRes)
-	if err != nil {
-		return nil, nil, err
-	}
-	return ev, &queryRes, nil
-}

roomserver/internal/perform/perform_leave.go

@@ -19,8 +19,10 @@ import (
 	"encoding/json"
 	"fmt"
 	"strings"
+	"time"
 
 	"github.com/matrix-org/dendrite/clientapi/jsonerror"
+	"github.com/matrix-org/dendrite/internal/eventutil"
 	"github.com/matrix-org/gomatrix"
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
@@ -28,6 +30,7 @@ import (
 
 	fsAPI "github.com/matrix-org/dendrite/federationapi/api"
 	"github.com/matrix-org/dendrite/roomserver/api"
+	rsAPI "github.com/matrix-org/dendrite/roomserver/api"
 	"github.com/matrix-org/dendrite/roomserver/internal/helpers"
 	"github.com/matrix-org/dendrite/roomserver/internal/input"
 	"github.com/matrix-org/dendrite/roomserver/storage"
@@ -39,6 +42,7 @@ type Leaver struct {
 	Cfg     *config.RoomServer
 	DB      storage.Database
 	FSAPI   fsAPI.RoomserverFederationAPI
+	RSAPI   rsAPI.RoomserverInternalAPI
 	UserAPI userapi.RoomserverUserAPI
 	Inputer *input.Inputer
 }
@@ -173,9 +177,15 @@ func (r *Leaver) performLeaveRoomByID(
 	// a leave event.
 	// TODO: Check what happens if the room exists on the server
 	// but everyone has since left. I suspect it does the wrong thing.
-	event, buildRes, err := buildEvent(ctx, r.DB, r.Cfg.Matrix, senderDomain, &eb)
+
+	var buildRes rsAPI.QueryLatestEventsAndStateResponse
+	identity, err := r.Cfg.Matrix.SigningIdentityFor(senderDomain)
 	if err != nil {
-		return nil, fmt.Errorf("eventutil.BuildEvent: %w", err)
+		return nil, fmt.Errorf("SigningIdentityFor: %w", err)
+	}
+	event, err := eventutil.QueryAndBuildEvent(ctx, &eb, r.Cfg.Matrix, identity, time.Now(), r.RSAPI, &buildRes)
+	if err != nil {
+		return nil, fmt.Errorf("eventutil.QueryAndBuildEvent: %w", err)
 	}
 
 	// Give our leave event to the roomserver input stream. The

roomserver/internal/perform/perform_upgrade.go

@@ -526,7 +526,7 @@ func (r *Upgrader) sendInitialEvents(ctx context.Context, evTime time.Time, user
 			builder.PrevEvents = []gomatrixserverlib.EventReference{builtEvents[i-1].EventReference()}
 		}
 		var event *gomatrixserverlib.Event
-		event, err = r.buildEvent(&builder, userDomain, &authEvents, evTime, gomatrixserverlib.RoomVersion(newVersion))
+		event, err = builder.AddAuthEventsAndBuild(userDomain, &authEvents, evTime, gomatrixserverlib.RoomVersion(newVersion), r.Cfg.Matrix.KeyID, r.Cfg.Matrix.PrivateKey)
 		if err != nil {
 			return &api.PerformError{
 				Msg: fmt.Sprintf("Failed to build new %q event: %s", builder.Type, err),
@@ -707,29 +707,3 @@ func (r *Upgrader) sendHeaderedEvent(
 
 	return nil
 }
-
-func (r *Upgrader) buildEvent(
-	builder *gomatrixserverlib.EventBuilder,
-	serverName gomatrixserverlib.ServerName,
-	provider gomatrixserverlib.AuthEventProvider,
-	evTime time.Time,
-	roomVersion gomatrixserverlib.RoomVersion,
-) (*gomatrixserverlib.Event, error) {
-	eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
-	if err != nil {
-		return nil, err
-	}
-	refs, err := eventsNeeded.AuthEventReferences(provider)
-	if err != nil {
-		return nil, err
-	}
-	builder.AuthEvents = refs
-	event, err := builder.Build(
-		evTime, serverName, r.Cfg.Matrix.KeyID,
-		r.Cfg.Matrix.PrivateKey, roomVersion,
-	)
-	if err != nil {
-		return nil, err
-	}
-	return event, nil
-}