post-upgrade with x/upgrade queries not working

CHANGELOG.md

@@ -45,6 +45,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (types) [\#7084](https://github.com/cosmos/cosmos-sdk/pull/7084) Fix panic when calling `BigInt()` on an uninitialized `Int`.
 * (client) [\#7048](https://github.com/cosmos/cosmos-sdk/issues/7048) Fix client `keys add` failure when generating mnemonic in interactive mode.
 * (keys) [\#7397](https://github.com/cosmos/cosmos-sdk/pull/7397) Update 99designs/keyring to v1.1.6 for go 1.15 compatibility.
+* (kvstore) [\#7531](https://github.com/cosmos/cosmos-sdk/pull/7531) Allow new stores to be registered during on-chain upgrades.
 
 ## [v0.39.1]
 

baseapp/baseapp_test.go

@@ -364,7 +364,7 @@ func TestLoadVersionPruning(t *testing.T) {
 
 	for _, v := range []int64{1, 2, 4} {
 		_, err = app.cms.CacheMultiStoreWithVersion(v)
-		require.Error(t, err)
+		require.NoError(t, err)
 	}
 
 	for _, v := range []int64{3, 5, 6, 7} {

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/cosmos/ledger-cosmos-go v0.11.1
 	github.com/gogo/protobuf v1.3.1
 	github.com/golang/mock v1.3.1-0.20190508161146-9fa652df1129
+	github.com/golang/snappy v0.0.2 // indirect
 	github.com/gorilla/handlers v1.4.2
 	github.com/gorilla/mux v1.7.4
 	github.com/hashicorp/golang-lru v0.5.4
@@ -26,11 +27,13 @@ require (
 	github.com/stretchr/testify v1.6.1
 	github.com/tendermint/btcd v0.1.1
 	github.com/tendermint/crypto v0.0.0-20191022145703-50d29ede1e15
-	github.com/tendermint/go-amino v0.15.1
-	github.com/tendermint/iavl v0.14.0
-	github.com/tendermint/tendermint v0.33.7
+	github.com/tendermint/go-amino v0.15.0
+	github.com/tendermint/iavl v0.14.1
+	github.com/tendermint/tendermint v0.33.8
 	github.com/tendermint/tm-db v0.5.1
-	google.golang.org/grpc v1.30.0 // indirect
+	golang.org/x/net v0.0.0-20201010224723-4f7140c49acb // indirect
+	golang.org/x/sys v0.0.0-20201013132646-2da7054afaeb // indirect
+	google.golang.org/protobuf v1.25.0 // indirect
 	gopkg.in/yaml.v2 v2.3.0
 )
 

go.sum

@@ -9,6 +9,7 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/ChainSafe/go-schnorrkel v0.0.0-20200405005733-88cbf1b4c40d h1:nalkkPQcITbvhmL4+C4cKA87NW0tfm3Kl9VXRoPywFg=
 github.com/ChainSafe/go-schnorrkel v0.0.0-20200405005733-88cbf1b4c40d/go.mod h1:URdX5+vg25ts3aCh8H5IFZybJYKWhJHYMTnf+ULtoC4=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
+github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
@@ -153,9 +154,13 @@ github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrU
 github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
 github.com/golang/protobuf v1.4.0 h1:oOuy+ugB+P/kBdUnG5QaMXSIyJ1q38wWSojYCb3z5VQ=
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
+github.com/golang/protobuf v1.4.1 h1:ZFgWrT+bLgsYPirOnRfKLYJLvssAegOj/hgyMFdJZe0=
+github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/snappy v0.0.2 h1:aeE13tS0IiQgFjYdoL8qN3K1N2bXXtI6Vi51/y7BpMw=
+github.com/golang/snappy v0.0.2/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0 h1:0udJVsspx3VBr5FwtLhQQtuAsVc79tTq0ocGIPAU6qo=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
@@ -164,6 +169,8 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.0 h1:/QaMHBdZ26BB3SSst0Iwl10Epc+xhTquomWX0oZEB6w=
+github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf/go.mod h1:HP5RmnzzSNb993RKQDq4+1A4ia9nllfqcQFTQJedwGI=
 github.com/google/gofuzz v1.0.0 h1:A8PeW59pxE9IoFRqBp37U+mSNaQoZ46F1f0f863XSXw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
@@ -422,13 +429,13 @@ github.com/tendermint/btcd v0.1.1/go.mod h1:DC6/m53jtQzr/NFmMNEu0rxf18/ktVoVtMrn
 github.com/tendermint/crypto v0.0.0-20191022145703-50d29ede1e15 h1:hqAk8riJvK4RMWx1aInLzndwxKalgi5rTqgfXxOxbEI=
 github.com/tendermint/crypto v0.0.0-20191022145703-50d29ede1e15/go.mod h1:z4YtwM70uOnk8h0pjJYlj3zdYwi9l03By6iAIF5j/Pk=
 github.com/tendermint/go-amino v0.14.1/go.mod h1:i/UKE5Uocn+argJJBb12qTZsCDBcAYMbR92AaJVmKso=
-github.com/tendermint/go-amino v0.15.1 h1:D2uk35eT4iTsvJd9jWIetzthE5C0/k2QmMFkCN+4JgQ=
-github.com/tendermint/go-amino v0.15.1/go.mod h1:TQU0M1i/ImAo+tYpZi73AU3V/dKeCoMC9Sphe2ZwGME=
-github.com/tendermint/iavl v0.14.0 h1:Jkff+IFrXxRWtH9Jn/ga/2cxNnzMTv58xEKgCJsKUBg=
-github.com/tendermint/iavl v0.14.0/go.mod h1:QmfViflFiXzxKLQE4tAUuWQHq+RSuQFxablW5oJZ6sE=
+github.com/tendermint/go-amino v0.15.0 h1:TC4e66P59W7ML9+bxio17CPKnxW3nKIRAYskntMAoRk=
+github.com/tendermint/go-amino v0.15.0/go.mod h1:TQU0M1i/ImAo+tYpZi73AU3V/dKeCoMC9Sphe2ZwGME=
+github.com/tendermint/iavl v0.14.1 h1:jz7YOvGiPwmcqqVMcSMjxCu4WXtQYGhKdKrWTTJ5EKs=
+github.com/tendermint/iavl v0.14.1/go.mod h1:QmfViflFiXzxKLQE4tAUuWQHq+RSuQFxablW5oJZ6sE=
 github.com/tendermint/tendermint v0.33.5/go.mod h1:0yUs9eIuuDq07nQql9BmI30FtYGcEC60Tu5JzB5IezM=
-github.com/tendermint/tendermint v0.33.7 h1:b5CQD8ggDtl4u0EbXzabi0MaOw9NrcXker6ijEkAE74=
-github.com/tendermint/tendermint v0.33.7/go.mod h1:0yUs9eIuuDq07nQql9BmI30FtYGcEC60Tu5JzB5IezM=
+github.com/tendermint/tendermint v0.33.8 h1:Xxu4QhpqcomSE0iQDw1MqLgfsa8fqtPtWFJK6zZOVso=
+github.com/tendermint/tendermint v0.33.8/go.mod h1:0yUs9eIuuDq07nQql9BmI30FtYGcEC60Tu5JzB5IezM=
 github.com/tendermint/tm-db v0.5.1 h1:H9HDq8UEA7Eeg13kdYckkgwwkQLBnJGgX4PgLJRhieY=
 github.com/tendermint/tm-db v0.5.1/go.mod h1:g92zWjHpCYlEvQXvy9M168Su8V1IBEeawpXVVBaK4f4=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
@@ -467,6 +474,8 @@ golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20200406173513-056763e48d71/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200429183012-4b2356b1ed79 h1:IaQbIIB2X/Mp/DKctl6ROxz1KyMlKp4uyvL6+kQ7C88=
 golang.org/x/crypto v0.0.0-20200429183012-4b2356b1ed79/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
@@ -495,6 +504,8 @@ golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e h1:3G+cUijn7XD+S4eJFddp53Pv7+slrESplyjG25HgL+k=
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
+golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 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/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -524,9 +535,14 @@ golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd h1:xhmwyvizuTgC2qz7ZlMluP20uW+C3Rm0FD/WLDX8884=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201013132646-2da7054afaeb h1:HS9IzC4UFbpMBLQUDSQcU+ViVT1vdFCQVjdPVpTlZrs=
+golang.org/x/sys v0.0.0-20201013132646-2da7054afaeb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/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=
@@ -560,6 +576,8 @@ google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190530194941-fb225487d101/go.mod h1:z3L6/3dTEVtUr6QSP8miRzeRqwQOioJ9I66odjN4I7s=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 h1:gSJIx1SDwno+2ElGhA4+qG2zF97qiUzTM+rQ0klBOcE=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 h1:+kGHl1aib/qcwaRi1CbqBZ1rk19r85MNUf8HaBghugY=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLDdAQM=
@@ -570,16 +588,20 @@ google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyac
 google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
+google.golang.org/grpc v1.28.1 h1:C1QC6KzgSiLyBabDi87BbjaGreoRgGUF5nOyvfrAZ1k=
 google.golang.org/grpc v1.28.1/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
-google.golang.org/grpc v1.30.0 h1:M5a8xTlYTxwMn5ZFkwhRabsygDY5G8TYLyQDBxJNAxE=
-google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0 h1:qdOKuR/EIArgaWNjetjgTzgVTAZ+S/WXVrq9HW9zimw=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

store/iavl/store.go

@@ -36,7 +36,14 @@ type Store struct {
 // store's version (id) from the provided DB. An error is returned if the version
 // fails to load.
 func LoadStore(db dbm.DB, id types.CommitID, lazyLoading bool) (types.CommitKVStore, error) {
-	tree, err := iavl.NewMutableTree(db, defaultIAVLCacheSize)
+	return LoadStoreWithInitialVersion(db, id, lazyLoading, 0)
+}
+
+// LoadStore returns an IAVL Store as a CommitKVStore setting its initialVersion
+// to the one given. Internally, it will load the store's version (id) from the
+// provided DB. An error is returned if the version fails to load.
+func LoadStoreWithInitialVersion(db dbm.DB, id types.CommitID, lazyLoading bool, initialVersion uint64) (types.CommitKVStore, error) {
+	tree, err := iavl.NewMutableTreeWithOpts(db, defaultIAVLCacheSize, &iavl.Options{InitialVersion: initialVersion})
 	if err != nil {
 		return nil, err
 	}
@@ -71,11 +78,11 @@ func UnsafeNewStore(tree *iavl.MutableTree) *Store {
 // GetImmutable returns a reference to a new store backed by an immutable IAVL
 // tree at a specific version (height) without any pruning options. This should
 // be used for querying and iteration only. If the version does not exist or has
-// been pruned, an error will be returned. Any mutable operations executed will
-// result in a panic.
+// been pruned, an empty immutable IAVL tree will be used.
+// Any mutable operations executed will result in a panic.
 func (st *Store) GetImmutable(version int64) (*Store, error) {
 	if !st.VersionExists(version) {
-		return nil, iavl.ErrVersionDoesNotExist
+		return &Store{tree: &immutableTree{&iavl.ImmutableTree{}}}, nil
 	}
 
 	iTree, err := st.tree.GetImmutable(version)

store/iavl/store_test.go

@@ -49,6 +49,62 @@ func newAlohaTree(t *testing.T, db dbm.DB) (*iavl.MutableTree, types.CommitID) {
 	return tree, types.CommitID{Version: ver, Hash: hash}
 }
 
+func TestLoadStore(t *testing.T) {
+	db := dbm.NewMemDB()
+	tree, _ := newAlohaTree(t, db)
+	store := UnsafeNewStore(tree)
+
+	// Create non-pruned height H
+	require.True(t, tree.Set([]byte("hello"), []byte("hallo")))
+	hash, verH, err := tree.SaveVersion()
+	cIDH := types.CommitID{Version: verH, Hash: hash}
+	require.Nil(t, err)
+
+	// Create pruned height Hp
+	require.True(t, tree.Set([]byte("hello"), []byte("hola")))
+	hash, verHp, err := tree.SaveVersion()
+	cIDHp := types.CommitID{Version: verHp, Hash: hash}
+	require.Nil(t, err)
+
+	// TODO: Prune this height
+
+	// Create current height Hc
+	require.True(t, tree.Set([]byte("hello"), []byte("ciao")))
+	hash, verHc, err := tree.SaveVersion()
+	cIDHc := types.CommitID{Version: verHc, Hash: hash}
+	require.Nil(t, err)
+
+	// Querying an existing store at some previous non-pruned height H
+	hStore, err := store.GetImmutable(verH)
+	require.NoError(t, err)
+	require.Equal(t, string(hStore.Get([]byte("hello"))), "hallo")
+
+	// Querying an existing store at some previous pruned height Hp
+	hpStore, err := store.GetImmutable(verHp)
+	require.NoError(t, err)
+	require.Equal(t, string(hpStore.Get([]byte("hello"))), "hola")
+
+	// Querying an existing store at current height Hc
+	hcStore, err := store.GetImmutable(verHc)
+	require.NoError(t, err)
+	require.Equal(t, string(hcStore.Get([]byte("hello"))), "ciao")
+
+	// Querying a new store at some previous non-pruned height H
+	newHStore, err := LoadStore(db, cIDH, false)
+	require.NoError(t, err)
+	require.Equal(t, string(newHStore.Get([]byte("hello"))), "hallo")
+
+	// Querying a new store at some previous pruned height Hp
+	newHpStore, err := LoadStore(db, cIDHp, false)
+	require.NoError(t, err)
+	require.Equal(t, string(newHpStore.Get([]byte("hello"))), "hola")
+
+	// Querying a new store at current height H
+	newHcStore, err := LoadStore(db, cIDHc, false)
+	require.NoError(t, err)
+	require.Equal(t, string(newHcStore.Get([]byte("hello"))), "ciao")
+}
+
 func TestGetImmutable(t *testing.T) {
 	db := dbm.NewMemDB()
 	tree, cID := newAlohaTree(t, db)
@@ -60,7 +116,7 @@ func TestGetImmutable(t *testing.T) {
 	require.Nil(t, err)
 
 	_, err = store.GetImmutable(cID.Version + 1)
-	require.Error(t, err)
+	require.NoError(t, err)
 
 	newStore, err := store.GetImmutable(cID.Version - 1)
 	require.NoError(t, err)

store/rootmulti/store.go

@@ -166,8 +166,15 @@ func (rs *Store) loadVersion(ver int64, upgrades *types.StoreUpgrades) error {
 	// load each Store (note this doesn't panic on unmounted keys now)
 	var newStores = make(map[types.StoreKey]types.CommitKVStore)
 	for key, storeParams := range rs.storesParams {
+		commitID := rs.getCommitID(infos, key.Name())
+
+		// If it has been added, set the initial version
+		if upgrades.IsAdded(key.Name()) {
+			storeParams.initialVersion = uint64(ver) + 1
+		}
+
 		// Load it
-		store, err := rs.loadCommitStoreFromParams(key, rs.getCommitID(infos, key.Name()), storeParams)
+		store, err := rs.loadCommitStoreFromParams(key, commitID, storeParams)
 		if err != nil {
 			return fmt.Errorf("failed to load Store: %v", err)
 		}
@@ -539,7 +546,15 @@ func (rs *Store) loadCommitStoreFromParams(key types.StoreKey, id types.CommitID
 		panic("recursive MultiStores not yet supported")
 
 	case types.StoreTypeIAVL:
-		store, err := iavl.LoadStore(db, id, rs.lazyLoading)
+		var store types.CommitKVStore
+		var err error
+
+		if params.initialVersion == 0 {
+			store, err = iavl.LoadStore(db, id, rs.lazyLoading)
+		} else {
+			store, err = iavl.LoadStoreWithInitialVersion(db, id, rs.lazyLoading, params.initialVersion)
+		}
+
 		if err != nil {
 			return nil, err
 		}
@@ -573,9 +588,10 @@ func (rs *Store) loadCommitStoreFromParams(key types.StoreKey, id types.CommitID
 // storeParams
 
 type storeParams struct {
-	key types.StoreKey
-	db  dbm.DB
-	typ types.StoreType
+	key            types.StoreKey
+	db             dbm.DB
+	typ            types.StoreType
+	initialVersion uint64
 }
 
 //----------------------------------------