fix: reinstate gc test (#2318)

.github/patches/postagecontract.patch

 26c26
 < 	BucketDepth = uint8(16)
 ---
-> 	BucketDepth = uint8(10)
+> 	BucketDepth = uint8(2)

.github/patches/postagereserve.patch

 43c43
 < var DefaultDepth = uint8(12) // 12 is the testnet depth at the time of merging to master
 ---
-> var DefaultDepth = uint8(5) // 12 is the testnet depth at the time of merging to master
+> var DefaultDepth = uint8(2) // 12 is the testnet depth at the time of merging to master

.github/patches/postagereserve_gc.patch

 48c48
 < var Capacity = exp2(22)
 ---
-> var Capacity = exp2(6)
+> var Capacity = exp2(4)

.github/workflows/beekeeper.yml

@@ -113,6 +113,29 @@ jobs:
         run: |
           beekeeper delete bee-cluster --cluster-name local-clef
           make beelocal ACTION=uninstall
+      - name: Apply patches
+        run: |
+          patch pkg/postage/batchstore/reserve.go .github/patches/postagereserve_gc.patch
+      - name: Prepare testing cluster (storage incentives setup)
+        run: |
+          timeout 10m make beelocal OPTS='ci skip-vet'
+      - name: Set kube config
+        run: |
+          mkdir -p ~/.kube
+          cp /etc/rancher/k3s/k3s.yaml ~/.kube/config
+      - name: Set testing cluster (storage incentives setup)
+        run: |
+          timeout 10m make deploylocal BEEKEEPER_CLUSTER=local-gc
+      - name: Test pingpong
+        id: pingpong-3
+        run: until beekeeper check --cluster-name local-gc --checks ci-pingpong; do echo "waiting for pingpong..."; sleep .3; done
+      - name: Test gc
+        id: gc-chunk-1
+        run: beekeeper check --cluster-name local-gc --checks=ci-gc
+      - name: Destroy the cluster
+        run: |
+          beekeeper delete bee-cluster --cluster-name local-gc
+          make beelocal ACTION=uninstall
       - name: Retag Docker image and push for cache
         if: success()
         run: |
@@ -154,6 +177,8 @@ jobs:
           if ${{ steps.settlements-2.outcome=='failure' }}; then FAILED=settlements-2; fi
           if ${{ steps.pss.outcome=='failure' }}; then FAILED=pss; fi
           if ${{ steps.soc.outcome=='failure' }}; then FAILED=soc; fi
+          if ${{ steps.pingpong-3.outcome=='failure' }}; then FAILED=pingpong-3; fi
+          if ${{ steps.gc-chunk-1.outcome=='failure' }}; then FAILED=gc-chunk-1; fi
           KEYS=$(curl -sSf -X POST https://eu.relay.tunshell.com/api/sessions)
           curl -sSf -X POST -H "Content-Type: application/json" -d "{\"text\": \"**${RUN_TYPE}** ${{ github.head_ref }}\nFailed -> \`${FAILED}\`\nDebug -> \`sh <(curl -sSf https://lets.tunshell.com/init.sh) L $(echo $KEYS | jq -r .peer2_key) \${TUNSHELL_SECRET} eu.relay.tunshell.com\`\"}" https://beehive.ethswarm.org/hooks/${{ secrets.WEBHOOK_KEY }}
           echo "Failed test: ${FAILED}"

pkg/debugapi/postage.go

@@ -265,6 +265,7 @@ func (s *Service) reserveStateHandler(w http.ResponseWriter, _ *http.Request) {
 
 	jsonhttp.OK(w, reserveStateResponse{
 		Radius:        state.Radius,
+		StorageRadius: state.StorageRadius,
 		Available:     state.Available,
 		Outer:         bigint.Wrap(state.Outer),
 		Inner:         bigint.Wrap(state.Inner),

pkg/postage/batchstore/reserve.go

@@ -39,9 +39,6 @@ import (
 	"github.com/ethersphere/bee/pkg/swarm"
 )
 
-// ErrBatchNotFound is returned when the postage batch is not found or expired
-var ErrBatchNotFound = errors.New("postage batch not found or expired")
-
 // DefaultDepth is the initial depth for the reserve
 var DefaultDepth = uint8(12) // 12 is the testnet depth at the time of merging to master
 
@@ -179,7 +176,7 @@ func (s *store) evictExpired() error {
 			return true, err
 		}
 
-		s.rs.Available += multiplier * exp2(b.Radius-s.rs.Radius-1)
+		s.rs.Available += multiplier * exp2(uint(b.Radius-s.rs.Radius-1))
 
 		// if batch has no value then delete it
 		if b.Value.Cmp(s.cs.TotalAmount) <= 0 {
@@ -236,7 +233,7 @@ func (rs *reserveState) change(oldv, newv *big.Int, oldDepth, newDepth uint8) (i
 // size returns the number of chunks the local node is responsible
 // to store in its reserve.
 func (rs *reserveState) size(depth uint8, t tier) int64 {
-	size := exp2(depth - rs.Radius - 1)
+	size := exp2(uint(depth - rs.Radius - 1))
 	switch t {
 	case inner:
 		return size
@@ -354,7 +351,7 @@ func (s *store) evictOuter(last *postage.Batch) error {
 			return true, nil
 		}
 		// unreserve outer PO of the lowest priority batch  until capacity is back to positive
-		s.rs.Available += exp2(b.Depth - s.rs.Radius - 1)
+		s.rs.Available += exp2(uint(b.Depth) - uint(s.rs.Radius) - 1)
 		s.rs.Outer.Set(b.Value)
 		return false, s.unreserveFn(b.ID, s.rs.Radius)
 	})
@@ -409,13 +406,6 @@ func (u *UnreserveItem) UnmarshalBinary(b []byte) error {
 }
 
 // exp2 returns the e-th power of 2
-func exp2(e uint8) int64 {
-	if e == 0 {
-		return 1
-	}
-	b := int64(2)
-	for i := uint8(1); i < e; i++ {
-		b *= 2
-	}
-	return b
+func exp2(e uint) int64 {
+	return 1 << e
 }