@@ -22,12 +22,12 @@
 // Status define status of the network
 type Status struct {
 	sync.RWMutex
-	Network           Network                  `json:"network"`
-	Metrics           historydb.Metrics        `json:"metrics"`
-	Rollup            common.RollupVariables   `json:"rollup"`
-	Auction           common.AuctionVariables  `json:"auction"`
-	WithdrawalDelayer common.WDelayerVariables `json:"withdrawalDelayer"`
-	RecommendedFee    common.RecommendedFee    `json:"recommendedFee"`
+	Network           Network                      `json:"network"`
+	Metrics           historydb.Metrics            `json:"metrics"`
+	Rollup            historydb.RollupVariablesAPI `json:"rollup"`
+	Auction           common.AuctionVariables      `json:"auction"`
+	WithdrawalDelayer common.WDelayerVariables     `json:"withdrawalDelayer"`
+	RecommendedFee    common.RecommendedFee        `json:"recommendedFee"`
 }
 
 // API serves HTTP requests to allow external interaction with the Hermez node

@@ -8,6 +8,7 @@ "time"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/gin-gonic/gin"
+	"github.com/hermeznetwork/hermez-node/apitypes"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 	"github.com/hermeznetwork/tracerr"
@@ -57,7 +58,23 @@
 // SetRollupVariables set Status.Rollup variables
 func (a *API) SetRollupVariables(rollupVariables common.RollupVariables) {
 	a.status.Lock()
-	a.status.Rollup = rollupVariables
+	var rollupVAPI historydb.RollupVariablesAPI
+	rollupVAPI.EthBlockNum = rollupVariables.EthBlockNum
+	rollupVAPI.FeeAddToken = apitypes.NewBigIntStr(rollupVariables.FeeAddToken)
+	rollupVAPI.ForgeL1L2BatchTimeout = rollupVariables.ForgeL1L2BatchTimeout
+	rollupVAPI.WithdrawalDelay = rollupVariables.WithdrawalDelay
+
+	for i, bucket := range rollupVariables.Buckets {
+		var apiBucket historydb.BucketParamsAPI
+		apiBucket.CeilUSD = apitypes.NewBigIntStr(bucket.CeilUSD)
+		apiBucket.Withdrawals = apitypes.NewBigIntStr(bucket.Withdrawals)
+		apiBucket.BlockWithdrawalRate = apitypes.NewBigIntStr(bucket.BlockWithdrawalRate)
+		apiBucket.MaxWithdrawals = apitypes.NewBigIntStr(bucket.MaxWithdrawals)
+		rollupVAPI.Buckets[i] = apiBucket
+	}
+
+	rollupVAPI.SafeMode = rollupVariables.SafeMode
+	a.status.Rollup = rollupVAPI
 	a.status.Unlock()
 }
 

@@ -4,6 +4,7 @@ import (
 	"math/big"
 	"testing"
 
+	"github.com/hermeznetwork/hermez-node/apitypes"
 	"github.com/hermeznetwork/hermez-node/common"
 	"github.com/hermeznetwork/hermez-node/db/historydb"
 	"github.com/stretchr/testify/assert"
@@ -11,12 +12,12 @@ "github.com/stretchr/testify/require"
 )
 
 type testStatus struct {
-	Network           testNetwork              `json:"network"`
-	Metrics           historydb.Metrics        `json:"metrics"`
-	Rollup            common.RollupVariables   `json:"rollup"`
-	Auction           common.AuctionVariables  `json:"auction"`
-	WithdrawalDelayer common.WDelayerVariables `json:"withdrawalDelayer"`
-	RecommendedFee    common.RecommendedFee    `json:"recommendedFee"`
+	Network           testNetwork                  `json:"network"`
+	Metrics           historydb.Metrics            `json:"metrics"`
+	Rollup            historydb.RollupVariablesAPI `json:"rollup"`
+	Auction           common.AuctionVariables      `json:"auction"`
+	WithdrawalDelayer common.WDelayerVariables     `json:"withdrawalDelayer"`
+	RecommendedFee    common.RecommendedFee        `json:"recommendedFee"`
 }
 
 type testNetwork struct {
@@ -29,9 +30,24 @@ }
 
 func TestSetRollupVariables(t *testing.T) {
 	rollupVars := &common.RollupVariables{}
-	assert.Equal(t, *rollupVars, api.status.Rollup)
+	assertEqualRollupVariables(t, *rollupVars, api.status.Rollup, true)
 	api.SetRollupVariables(tc.rollupVars)
-	assert.Equal(t, tc.rollupVars, api.status.Rollup)
+	assertEqualRollupVariables(t, tc.rollupVars, api.status.Rollup, true)
+}
+
+func assertEqualRollupVariables(t *testing.T, rollupVariables common.RollupVariables, apiVariables historydb.RollupVariablesAPI, checkBuckets bool) {
+	assert.Equal(t, apitypes.NewBigIntStr(rollupVariables.FeeAddToken), apiVariables.FeeAddToken)
+	assert.Equal(t, rollupVariables.ForgeL1L2BatchTimeout, apiVariables.ForgeL1L2BatchTimeout)
+	assert.Equal(t, rollupVariables.WithdrawalDelay, apiVariables.WithdrawalDelay)
+	assert.Equal(t, rollupVariables.SafeMode, apiVariables.SafeMode)
+	if checkBuckets {
+		for i, bucket := range rollupVariables.Buckets {
+			assert.Equal(t, apitypes.NewBigIntStr(bucket.BlockWithdrawalRate), apiVariables.Buckets[i].BlockWithdrawalRate)
+			assert.Equal(t, apitypes.NewBigIntStr(bucket.CeilUSD), apiVariables.Buckets[i].CeilUSD)
+			assert.Equal(t, apitypes.NewBigIntStr(bucket.MaxWithdrawals), apiVariables.Buckets[i].MaxWithdrawals)
+			assert.Equal(t, apitypes.NewBigIntStr(bucket.Withdrawals), apiVariables.Buckets[i].Withdrawals)
+		}
+	}
 }
 
 func TestSetWDelayerVariables(t *testing.T) {
@@ -88,8 +104,8 @@ assert.Equal(t, lastBlock.Num, api.status.Network.LastSyncBlock)
 	assert.Equal(t, lastBatchNum, api.status.Network.LastBatch.BatchNum)
 	assert.Equal(t, currentSlotNum, api.status.Network.CurrentSlot)
 	assert.Equal(t, int(api.status.Auction.ClosedAuctionSlots)+1, len(api.status.Network.NextForgers))
-	assert.Equal(t, api.status.Rollup.Buckets[0].Withdrawals, big.NewInt(123))
-	assert.Equal(t, api.status.Rollup.Buckets[2].Withdrawals, big.NewInt(43))
+	assert.Equal(t, api.status.Rollup.Buckets[0].Withdrawals, apitypes.NewBigIntStr(big.NewInt(123)))
+	assert.Equal(t, api.status.Rollup.Buckets[2].Withdrawals, apitypes.NewBigIntStr(big.NewInt(43)))
 }
 
 func TestUpdateMetrics(t *testing.T) {
@@ -141,10 +157,9 @@ assert.NoError(t, doGoodReq("GET", endpoint, nil, &status))
 
 	// SC vars
 	// UpdateNetworkInfo will overwrite buckets withdrawal values
-	// So we restore them before comparing, they are checked at
+	// So they won't be checked here, they are checked at
 	// TestUpdateNetworkInfo
-	status.Rollup.Buckets = tc.rollupVars.Buckets
-	assert.Equal(t, tc.rollupVars, status.Rollup)
+	assertEqualRollupVariables(t, tc.rollupVars, status.Rollup, false)
 	assert.Equal(t, tc.auctionVars, status.Auction)
 	assert.Equal(t, tc.wdelayerVars, status.WithdrawalDelayer)
 	// Network

@@ -2693,7 +2693,7 @@ type: integer
           description: Max Ethereum blocks after the last L1-L2-batch, when exceeds the timeout only L1-L2-batch are allowed.
           example: 5
         feeAddToken:
-          type: integer
+          type: string
           description: Fee to pay when registering tokens into the network.
           example: 5698
         withdrawalDelay:
@@ -2707,19 +2707,19 @@ items:
             type: object
             properties:
               ceilUSD:
-                type: integer
+                type: string
                 description: Max USD value
                 example: 1000
               withdrawals:
-                type: integer
+                type: string
                 description: Available withdrawals of the bucket
                 example: 4
               blockWithdrawalRate:
-                type: integer
+                type: string
                 description: Every `blockWithdrawalRate` blocks add 1 withdrawal
                 example: 8
               maxWithdrawals:
-                type: integer
+                type: string
                 description: Max withdrawals the bucket can hold
                 example: 4
             additionalProperties: false

@@ -1380,8 +1380,8 @@ return db.SlicePtrsToSlice(bucketUpdates).([]common.BucketUpdate), tracerr.Wrap(err)
 }
 
 // GetBucketUpdates retrieves latest values for each bucket
-func (hdb *HistoryDB) GetBucketUpdates() ([]common.BucketUpdate, error) {
-	var bucketUpdates []*common.BucketUpdate
+func (hdb *HistoryDB) GetBucketUpdates() ([]BucketUpdateAPI, error) {
+	var bucketUpdates []*BucketUpdateAPI
 	err := meddler.QueryAll(
 		hdb.db, &bucketUpdates,
 		`SELECT num_bucket, withdrawals FROM bucket_update 
@@ -1389,7 +1389,7 @@ WHERE item_id in(SELECT max(item_id) FROM bucket_update
 		group by num_bucket) 
 		ORDER BY num_bucket ASC;`,
 	)
-	return db.SlicePtrsToSlice(bucketUpdates).([]common.BucketUpdate), tracerr.Wrap(err)
+	return db.SlicePtrsToSlice(bucketUpdates).([]BucketUpdateAPI), tracerr.Wrap(err)
 }
 
 func (hdb *HistoryDB) addTokenExchanges(d meddler.DB, tokenExchanges []common.TokenExchange) error {

@@ -343,3 +343,31 @@ type MinBidInfo struct {
 	DefaultSlotSetBid        [6]*big.Int `json:"defaultSlotSetBid" meddler:"default_slot_set_bid,json" validate:"required"`
 	DefaultSlotSetBidSlotNum int64       `json:"-" meddler:"default_slot_set_bid_slot_num"`
 }
+
+// BucketUpdateAPI are the bucket updates (tracking the withdrawals value changes)
+// in Rollup Smart Contract
+type BucketUpdateAPI struct {
+	EthBlockNum int64               `json:"ethereumBlockNum" meddler:"eth_block_num"`
+	NumBucket   int                 `json:"numBucket" meddler:"num_bucket"`
+	BlockStamp  int64               `json:"blockStamp" meddler:"block_stamp"`
+	Withdrawals *apitypes.BigIntStr `json:"withdrawals" meddler:"withdrawals"`
+}
+
+// BucketParamsAPI are the parameter variables of each Bucket of Rollup Smart
+// Contract
+type BucketParamsAPI struct {
+	CeilUSD             *apitypes.BigIntStr `json:"ceilUSD"`
+	Withdrawals         *apitypes.BigIntStr `json:"withdrawals"`
+	BlockWithdrawalRate *apitypes.BigIntStr `json:"blockWithdrawalRate"`
+	MaxWithdrawals      *apitypes.BigIntStr `json:"maxWithdrawals"`
+}
+
+// RollupVariablesAPI are the variables of the Rollup Smart Contract
+type RollupVariablesAPI struct {
+	EthBlockNum           int64                                         `json:"ethereumBlockNum" meddler:"eth_block_num"`
+	FeeAddToken           *apitypes.BigIntStr                           `json:"feeAddToken" meddler:"fee_add_token" validate:"required"`
+	ForgeL1L2BatchTimeout int64                                         `json:"forgeL1L2BatchTimeout" meddler:"forge_l1_timeout" validate:"required"`
+	WithdrawalDelay       uint64                                        `json:"withdrawalDelay" meddler:"withdrawal_delay" validate:"required"`
+	Buckets               [common.RollupConstNumBuckets]BucketParamsAPI `json:"buckets" meddler:"buckets,json"`
+	SafeMode              bool                                          `json:"safeMode" meddler:"safe_mode"`
+}