diff --git a/app/lib/constants.ts b/app/lib/constants.ts
index 26180e81d5fb6efe6799f0096f9a914b0091d885..6de53d349a025efb22f3be7cc62ecb497e2a7385 100644
--- a/app/lib/constants.ts
+++ b/app/lib/constants.ts
@@ -1,6 +1,7 @@
 "use strict";
 import {CommonConstants} from "./common-libs/constants"
 import {OtherConstants} from "./other_constants"
+import { ProverConstants } from '../modules/prover/lib/constants';
 
 const UDID2        = "udid2;c;([A-Z-]*);([A-Z-]*);(\\d{4}-\\d{2}-\\d{2});(e\\+\\d{2}\\.\\d{2}(\\+|-)\\d{3}\\.\\d{2});(\\d+)(;?)";
 const PUBKEY       = CommonConstants.FORMATS.PUBKEY
@@ -114,7 +115,11 @@ module.exports = {
   },
   PROOF_OF_WORK: {
     EVALUATION: 1000,
-    UPPER_BOUND: CommonConstants.PROOF_OF_WORK.UPPER_BOUND.slice()
+    UPPER_BOUND: CommonConstants.PROOF_OF_WORK.UPPER_BOUND.slice(),
+    DEFAULT: {
+      CPU: ProverConstants.DEFAULT_CPU,
+      PREFIX: ProverConstants.DEFAULT_PEER_ID
+    }
   },
 
   DEFAULT_CURRENCY_NAME: "no_currency",
diff --git a/app/lib/dal/fileDAL.ts b/app/lib/dal/fileDAL.ts
index db28e72c5f3f3721e7247116a87a624fc6575974..a79dc8d8dabfe41814656c40f7f9d9b5297afebd 100644
--- a/app/lib/dal/fileDAL.ts
+++ b/app/lib/dal/fileDAL.ts
@@ -759,7 +759,7 @@ export class FileDAL {
   }
 
   saveTransaction(tx:DBTx) {
-    return this.txsDAL.addPending(TransactionDTO.fromJSONObject(tx))
+    return this.txsDAL.addPending(tx)
   }
 
   async getTransactionsHistory(pubkey:string) {
diff --git a/app/lib/dal/sqliteDAL/CertDAL.ts b/app/lib/dal/sqliteDAL/CertDAL.ts
index d854ef16b44668efdd2fbefa75c4f676a2b2b122..d12774e5721706c8756f6e9c29a9101ac1cd9680 100644
--- a/app/lib/dal/sqliteDAL/CertDAL.ts
+++ b/app/lib/dal/sqliteDAL/CertDAL.ts
@@ -1,10 +1,11 @@
 import {SQLiteDriver} from "../drivers/SQLiteDriver"
 import {AbstractSQLite} from "./AbstractSQLite"
-import {SandBox} from "./SandBox"
+import { SandBox } from './SandBox';
+import { DBDocument } from './DocumentDAL';
 
 const constants = require('../../constants');
 
-export interface DBCert {
+export interface DBCert extends DBDocument {
   linked:boolean
   written:boolean
   written_block:null
diff --git a/app/lib/dal/sqliteDAL/DocumentDAL.ts b/app/lib/dal/sqliteDAL/DocumentDAL.ts
new file mode 100644
index 0000000000000000000000000000000000000000..d2097d7f025f31ee507e1b83051bfd36ca3f2f55
--- /dev/null
+++ b/app/lib/dal/sqliteDAL/DocumentDAL.ts
@@ -0,0 +1,3 @@
+export interface DBDocument {
+  issuers?: string[]
+}
\ No newline at end of file
diff --git a/app/lib/dal/sqliteDAL/IdentityDAL.ts b/app/lib/dal/sqliteDAL/IdentityDAL.ts
index c23f6be99df73a7d0ba3a8efb07e283a2acd7cfb..364eb00cd1e822b82e0c590a491154a160641a11 100644
--- a/app/lib/dal/sqliteDAL/IdentityDAL.ts
+++ b/app/lib/dal/sqliteDAL/IdentityDAL.ts
@@ -1,8 +1,9 @@
 import {AbstractSQLite} from "./AbstractSQLite"
 import {SQLiteDriver} from "../drivers/SQLiteDriver"
-import {SandBox} from "./SandBox"
+import { SandBox } from './SandBox';
 import {IdentityDTO} from "../../dto/IdentityDTO"
 import {Cloneable} from "../../dto/Cloneable";
+import { DBDocument } from './DocumentDAL';
 const constants = require('../../constants');
 
 export abstract class DBIdentity implements Cloneable {
@@ -143,7 +144,7 @@ export class ExistingDBIdentity extends DBIdentity {
   }
 }
 
-export interface DBSandboxIdentity extends DBIdentity {
+export interface DBSandboxIdentity extends DBIdentity,DBDocument {
   certsCount: number
   ref_block: number
 }
diff --git a/app/lib/dal/sqliteDAL/MembershipDAL.ts b/app/lib/dal/sqliteDAL/MembershipDAL.ts
index 61ce346e9f9580716d482edd346caf0e7bd3f864..110ed1429ef627d114a54b2937d09396d92c0416 100644
--- a/app/lib/dal/sqliteDAL/MembershipDAL.ts
+++ b/app/lib/dal/sqliteDAL/MembershipDAL.ts
@@ -1,10 +1,11 @@
 import {SQLiteDriver} from "../drivers/SQLiteDriver";
 import {AbstractSQLite} from "./AbstractSQLite";
-import {SandBox} from "./SandBox";
+import { SandBox } from './SandBox';
+import { DBDocument } from './DocumentDAL';
 const _ = require('underscore');
 const constants = require('../../constants');
 
-export interface DBMembership {
+export interface DBMembership extends DBDocument {
   membership: string
   issuer: string
   number: number
diff --git a/app/lib/dal/sqliteDAL/SandBox.ts b/app/lib/dal/sqliteDAL/SandBox.ts
index c84f9a87fdd1f78ec24ade5dde70d001a536dd84..09431c3aada77ab98f4282737d0270eb5be85ff3 100644
--- a/app/lib/dal/sqliteDAL/SandBox.ts
+++ b/app/lib/dal/sqliteDAL/SandBox.ts
@@ -1,4 +1,6 @@
-export class SandBox<T> {
+import {DBDocument} from './DocumentDAL';
+
+export class SandBox<T extends DBDocument> {
 
   maxSize:number
   
@@ -10,8 +12,9 @@ export class SandBox<T> {
     this.maxSize = maxSize || 10
   }
   
-  async acceptNewSandBoxEntry(element:any, pubkey:string) {
-    if (element.pubkey === pubkey) {
+  async acceptNewSandBoxEntry(element:T, pubkey:string) {
+    // Accept any document which has the exception pubkey (= the node pubkey)
+    if (element.issuers !== undefined && element.issuers.indexOf(pubkey) !== -1) {
       return true;
     }
     const elements = await this.findElements()
diff --git a/app/lib/dal/sqliteDAL/TxsDAL.ts b/app/lib/dal/sqliteDAL/TxsDAL.ts
index b6330cb934f2f89f89554d6bca7443d0c7fa2bc3..dbc82ca99d71528ad6fb65580a21d12318ef574d 100644
--- a/app/lib/dal/sqliteDAL/TxsDAL.ts
+++ b/app/lib/dal/sqliteDAL/TxsDAL.ts
@@ -169,12 +169,10 @@ export class TxsDAL extends AbstractSQLite<DBTx> {
     return this.saveEntity(dbTx)
   }
 
-  addPending(tx:TransactionDTO) {
-    const dbTx = DBTx.fromTransactionDTO(tx)
+  addPending(dbTx:DBTx) {
     dbTx.received = moment().unix()
     dbTx.written = false
     dbTx.removed = false
-    dbTx.hash = tx.getHash()
     return this.saveEntity(dbTx)
   }
 
diff --git a/app/lib/dto/ConfDTO.ts b/app/lib/dto/ConfDTO.ts
index 2614318afcc81c1d2be8a4ce96929ac110932c34..2e77e92fc70336c82b99bbb7b908ee9251918d09 100644
--- a/app/lib/dto/ConfDTO.ts
+++ b/app/lib/dto/ConfDTO.ts
@@ -64,9 +64,9 @@ export interface NetworkConfDTO {
 
 export interface WS2PConfDTO {
   ws2p?: {
-    privateAccess: boolean
-    publicAccess: boolean
-    uuid: string
+    privateAccess?: boolean
+    publicAccess?: boolean
+    uuid?: string
     upnp?: boolean
     remotehost?: string|null
     remoteport?: number|null
@@ -131,6 +131,7 @@ export class ConfDTO implements CurrencyConfDTO, KeypairConfDTO, NetworkConfDTO,
     public remotehost: string|null,
     public remoteipv4: string|null,
     public remoteipv6: string|null,
+    public host: string,
     public port: number,
     public ipv4: string,
     public ipv6: string,
@@ -142,9 +143,9 @@ export class ConfDTO implements CurrencyConfDTO, KeypairConfDTO, NetworkConfDTO,
     public bmaWithCrawler: boolean,
     public proxiesConf: ProxiesConf|undefined,
     public ws2p?: {
-      privateAccess: boolean
-      publicAccess: boolean
-      uuid: string
+      privateAccess?: boolean
+      publicAccess?: boolean
+      uuid?: string
       upnp?: boolean
       remotehost?: string|null
       remoteport?: number|null
@@ -161,10 +162,11 @@ export class ConfDTO implements CurrencyConfDTO, KeypairConfDTO, NetworkConfDTO,
 ) {}
 
   static mock() {
-    return new ConfDTO("", "", [], [], 0, 0, 0.6, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, false, 0, false, 0, 0, 0, 0, 0, { pub:'', sec:'' }, null, "", "", 0, "", "", "", 0, "", "", null, false, "", true, false, true, undefined)
+    return new ConfDTO("", "", [], [], 0, 3600 * 1000, constants.PROOF_OF_WORK.DEFAULT.CPU, 1, constants.PROOF_OF_WORK.DEFAULT.PREFIX, 0, 0, constants.CONTRACT.DEFAULT.C, constants.CONTRACT.DEFAULT.DT, constants.CONTRACT.DEFAULT.DT_REEVAL, 0, constants.CONTRACT.DEFAULT.UD0, 0, 0, constants.CONTRACT.DEFAULT.STEPMAX, constants.CONTRACT.DEFAULT.SIGPERIOD, 0, constants.CONTRACT.DEFAULT.SIGVALIDITY, constants.CONTRACT.DEFAULT.MSVALIDITY, constants.CONTRACT.DEFAULT.SIGQTY, constants.CONTRACT.DEFAULT.SIGSTOCK, constants.CONTRACT.DEFAULT.X_PERCENT, constants.CONTRACT.DEFAULT.PERCENTROT, constants.CONTRACT.DEFAULT.POWDELAY, constants.CONTRACT.DEFAULT.AVGGENTIME, constants.CONTRACT.DEFAULT.MEDIANTIMEBLOCKS, false, 3000, false, constants.BRANCHES.DEFAULT_WINDOW_SIZE, constants.CONTRACT.DEFAULT.IDTYWINDOW, constants.CONTRACT.DEFAULT.MSWINDOW, constants.CONTRACT.DEFAULT.SIGWINDOW, 0, { pub:'', sec:'' }, null, "", "", 0, "", "", "", "", 0, "", "", null, false, "", true, true, false, new ProxiesConf(), undefined)
   }
 
   static defaultConf() {
+    /*return new ConfDTO("", "", [], [], 0, 3600 * 1000, constants.PROOF_OF_WORK.DEFAULT.CPU, 1, constants.PROOF_OF_WORK.DEFAULT.PREFIX, 0, 0, constants.CONTRACT.DEFAULT.C, constants.CONTRACT.DEFAULT.DT, constants.CONTRACT.DEFAULT.DT_REEVAL, 0, constants.CONTRACT.DEFAULT.UD0, 0, 0, constants.CONTRACT.DEFAULT.STEPMAX, constants.CONTRACT.DEFAULT.SIGPERIOD, 0, constants.CONTRACT.DEFAULT.SIGVALIDITY, constants.CONTRACT.DEFAULT.MSVALIDITY, constants.CONTRACT.DEFAULT.SIGQTY, constants.CONTRACT.DEFAULT.SIGSTOCK, constants.CONTRACT.DEFAULT.X_PERCENT, constants.CONTRACT.DEFAULT.PERCENTROT, constants.CONTRACT.DEFAULT.POWDELAY, constants.CONTRACT.DEFAULT.AVGGENTIME, constants.CONTRACT.DEFAULT.MEDIANTIMEBLOCKS, false, 3000, false, constants.BRANCHES.DEFAULT_WINDOW_SIZE, constants.CONTRACT.DEFAULT.IDTYWINDOW, constants.CONTRACT.DEFAULT.MSWINDOW, constants.CONTRACT.DEFAULT.SIGWINDOW, 0, { pub:'', sec:'' }, null, "", "", 0, "", "", "", "", 0, "", "", null, false, "", true, true)*/
     return {
       "currency": null,
       "endpoints": [],
diff --git a/app/modules/prover/index.ts b/app/modules/prover/index.ts
index d4b138265bf301c2e08b5bca2e39c3670e73261f..856e1423761bde02af8b9da064ffb307c0b65d18 100644
--- a/app/modules/prover/index.ts
+++ b/app/modules/prover/index.ts
@@ -1,6 +1,6 @@
 import {ConfDTO} from "../../lib/dto/ConfDTO"
 import {BlockGenerator, BlockGeneratorWhichProves} from "./lib/blockGenerator"
-import {Constants} from "./lib/constants"
+import {ProverConstants} from "./lib/constants"
 import {BlockProver} from "./lib/blockProver"
 import {Prover} from "./lib/prover"
 import {Contacter} from "../crawler/lib/contacter"
@@ -19,18 +19,18 @@ export const ProverDependency = {
     config: {
       onLoading: async (conf:ConfDTO) => {
         if (conf.cpu === null || conf.cpu === undefined) {
-          conf.cpu = Constants.DEFAULT_CPU;
+          conf.cpu = ProverConstants.DEFAULT_CPU;
         }
         if (conf.nbCores === null || conf.nbCores === undefined) {
-          conf.nbCores = Math.min(Constants.CORES_MAXIMUM_USE_IN_PARALLEL, require('os').cpus().length)
+          conf.nbCores = Math.min(ProverConstants.CORES_MAXIMUM_USE_IN_PARALLEL, require('os').cpus().length)
         } else if (conf.nbCores <= 0) {
           conf.nbCores = 1
         }
         if (conf.prefix === null || conf.prefix === undefined) {
-          conf.prefix = Constants.DEFAULT_PEER_ID;
+          conf.prefix = ProverConstants.DEFAULT_PEER_ID;
         }
-        conf.powSecurityRetryDelay = Constants.POW_SECURITY_RETRY_DELAY;
-        conf.powMaxHandicap = Constants.POW_MAXIMUM_ACCEPTABLE_HANDICAP;
+        conf.powSecurityRetryDelay = ProverConstants.POW_SECURITY_RETRY_DELAY;
+        conf.powMaxHandicap = ProverConstants.POW_MAXIMUM_ACCEPTABLE_HANDICAP;
       },
       beforeSave: async (conf:ConfDTO) => {
         delete conf.powSecurityRetryDelay;
diff --git a/app/modules/prover/lib/blockProver.ts b/app/modules/prover/lib/blockProver.ts
index 1c68518f7947d2fd0eb71c009488eec5250b02ae..9cd215d98d478a456857b52f9f5c5388e1afa153 100644
--- a/app/modules/prover/lib/blockProver.ts
+++ b/app/modules/prover/lib/blockProver.ts
@@ -1,4 +1,4 @@
-import {Constants} from "./constants"
+import {ProverConstants} from "./constants"
 import {Server} from "../../../../server"
 import {PowEngine} from "./engine"
 import {DBBlock} from "../../../lib/db/DBBlock"
@@ -165,7 +165,7 @@ export class BlockProver {
       // Start
       powFarm.setOnAlmostPoW((pow:any, matches:any, aBlock:any, found:boolean) => {
         this.powEvent(found, pow);
-        if (matches && matches[1].length >= Constants.MINIMAL_ZEROS_TO_SHOW_IN_LOGS) {
+        if (matches && matches[1].length >= ProverConstants.MINIMAL_ZEROS_TO_SHOW_IN_LOGS) {
           this.logger.info('Matched %s zeros %s with Nonce = %s for block#%s by %s', matches[1].length, pow, aBlock.nonce, aBlock.number, aBlock.issuer.slice(0,6));
         }
       });
diff --git a/app/modules/prover/lib/constants.ts b/app/modules/prover/lib/constants.ts
index 0602e7de87009833c41fccff032fd1c6b9d8e137..0a454d38fd9c85e58115c2f971bbb6cb1cea812e 100644
--- a/app/modules/prover/lib/constants.ts
+++ b/app/modules/prover/lib/constants.ts
@@ -1,4 +1,4 @@
-export const Constants = {
+export const ProverConstants = {
 
   CORES_MAXIMUM_USE_IN_PARALLEL: 8,
 
diff --git a/app/modules/prover/lib/engine.ts b/app/modules/prover/lib/engine.ts
index 352de59c7490a1b08aebf6bc60f0a8d25d866105..cc83f46822764786bf91c1c02156c597966cc299 100644
--- a/app/modules/prover/lib/engine.ts
+++ b/app/modules/prover/lib/engine.ts
@@ -1,4 +1,4 @@
-import {Constants} from "./constants"
+import {ProverConstants} from "./constants"
 import {Master as PowCluster} from "./powCluster"
 import {ConfDTO} from "../../../lib/dto/ConfDTO"
 
diff --git a/app/modules/prover/lib/powCluster.ts b/app/modules/prover/lib/powCluster.ts
index 1e1a6ad3d42afadf5c750a378426d8e7ab50df70..4d4820777cb9b279aebea2d09680d1be0b3aab1f 100644
--- a/app/modules/prover/lib/powCluster.ts
+++ b/app/modules/prover/lib/powCluster.ts
@@ -1,5 +1,5 @@
 import {ConfDTO} from "../../../lib/dto/ConfDTO"
-import {Constants} from "./constants"
+import {ProverConstants} from "./constants"
 
 const _ = require('underscore')
 const nuuid = require('node-uuid');
@@ -84,7 +84,7 @@ export class Master {
         })(),
 
         // Each worker has his own chunk of possible nonces
-        nonceBeginning: this.nbCores === 1 ? 0 : (index + 1) * Constants.NONCE_RANGE
+        nonceBeginning: this.nbCores === 1 ? 0 : (index + 1) * ProverConstants.NONCE_RANGE
       }
       return this.slavesMap[worker.id]
     })
diff --git a/app/modules/prover/lib/proof.ts b/app/modules/prover/lib/proof.ts
index cc60a584fec95dae212da94306d05c828ffcff1a..9b15c0be5aaff08b078c5dd495dbb0432be983ea 100644
--- a/app/modules/prover/lib/proof.ts
+++ b/app/modules/prover/lib/proof.ts
@@ -2,7 +2,7 @@ import {LOCAL_RULES_HELPERS} from "../../../lib/rules/local_rules"
 import {hashf} from "../../../lib/common"
 import {DBBlock} from "../../../lib/db/DBBlock"
 import {ConfDTO} from "../../../lib/dto/ConfDTO"
-import {Constants} from "./constants"
+import {ProverConstants} from "./constants"
 import {KeyGen} from "../../../lib/common-libs/crypto/keyring"
 import {dos2unix} from "../../../lib/common-libs/dos2unix"
 import {rawer} from "../../../lib/common-libs/index"
@@ -84,10 +84,10 @@ function beginNewProofOfWork(stuff:any) {
     const nbZeros = stuff.zeros;
     const pair = stuff.pair;
     const forcedTime = stuff.forcedTime;
-    currentCPU = conf.cpu || Constants.DEFAULT_CPU;
+    currentCPU = conf.cpu || ProverConstants.DEFAULT_CPU;
     prefix = parseInt(conf.prefix || prefix)
-    if (prefix && prefix < Constants.NONCE_RANGE) {
-      prefix *= 100 * Constants.NONCE_RANGE
+    if (prefix && prefix < ProverConstants.NONCE_RANGE) {
+      prefix *= 100 * ProverConstants.NONCE_RANGE
     }
     const highMark = stuff.highMark;
     const turnDuration = stuff.turnDuration || TURN_DURATION_IN_MILLISEC
@@ -184,7 +184,7 @@ function beginNewProofOfWork(stuff:any) {
             if (charOK) {
               found = !!(pow[nbZeros].match(new RegExp('[0-' + highMark + ']')))
             }
-            if (!found && nbZeros > 0 && j - 1 >= Constants.POW_MINIMAL_TO_SHOW) {
+            if (!found && nbZeros > 0 && j - 1 >= ProverConstants.POW_MINIMAL_TO_SHOW) {
               pSend({ pow: { pow: pow, block: block, nbZeros: nbZeros }});
             }
 
diff --git a/app/modules/ws2p/lib/WS2PCluster.ts b/app/modules/ws2p/lib/WS2PCluster.ts
index f41ad9cb297093ab957e04d9a4e6652266a79e27..bb76f0b4a44d53e6209b90f4232a49af16116c20 100644
--- a/app/modules/ws2p/lib/WS2PCluster.ts
+++ b/app/modules/ws2p/lib/WS2PCluster.ts
@@ -15,7 +15,7 @@ import {WS2PServerMessageHandler} from "./interface/WS2PServerMessageHandler"
 import {WS2PMessageHandler} from "./impl/WS2PMessageHandler"
 import { CommonConstants } from '../../../lib/common-libs/constants';
 import { Package } from "../../../lib/common/package";
-import { Constants } from "../../prover/lib/constants";
+import { ProverConstants } from "../../prover/lib/constants";
 import { ProxiesConf } from '../../../lib/proxy';
 
 const es = require('event-stream')
@@ -472,7 +472,7 @@ export class WS2PCluster {
     const software = 'duniter'
     const softVersion = Package.getInstance().version
     const ws2pId = (this.server.conf.ws2p && this.server.conf.ws2p.uuid) || '00000000'
-    const prefix = this.server.conf.prefix || Constants.DEFAULT_PEER_ID
+    const prefix = this.server.conf.prefix || ProverConstants.DEFAULT_PEER_ID
     const message = `${api}:HEAD:1:${pub}:${number}-${hash}:${ws2pId}:${software}:${softVersion}:${prefix}`
     const sig = key.signSync(message)
     return { sig, message, pub }
diff --git a/app/service/IdentityService.ts b/app/service/IdentityService.ts
index 81288451dc47dda3de811b1cc02c104d8f994b94..e052aa29a0c04e3172adea6ae0eb044cae15d554 100644
--- a/app/service/IdentityService.ts
+++ b/app/service/IdentityService.ts
@@ -115,7 +115,7 @@ export class IdentityService extends FIFOService {
         await GLOBAL_RULES_FUNCTIONS.checkIdentitiesAreWritable({ identities: [idtyObj.inline()], version: (current && current.version) || constants.BLOCK_GENERATED_VERSION }, this.conf, this.dal);
         if (byAbsorption !== BY_ABSORPTION) {
           if (!(await this.dal.idtyDAL.sandbox.acceptNewSandBoxEntry({
-              pubkey: idty.pubkey,
+              issuers: [idty.pubkey],
               ref_block: parseInt(idty.buid.split('-')[0])
             }, this.conf.pair && this.conf.pair.pub))) {
             throw constants.ERRORS.SANDBOX_FOR_IDENTITY_IS_FULL;
@@ -166,6 +166,7 @@ export class IdentityService extends FIFOService {
             };
           }
           const mCert:DBCert = {
+            issuers: [cert.from],
             from: cert.from,
             sig: cert.sig,
             block_number: cert.block_number,
@@ -239,7 +240,7 @@ export class IdentityService extends FIFOService {
           const idty = IdentityDTO.fromRevocation(revoc);
           idty.revocation_sig = revoc.revocation;
           if (!(await this.dal.idtyDAL.sandbox.acceptNewSandBoxEntry({
-              pubkey: idty.pubkey,
+              issuers: [idty.pubkey],
               ref_block: parseInt(idty.buid.split('-')[0]),
               certsCount: 0
             }, this.conf.pair && this.conf.pair.pub))) {
diff --git a/app/service/MembershipService.ts b/app/service/MembershipService.ts
index fd27d3d24873ec524b77c2abe855254c405e7248..1cbb2d73cf10bfd00e63619abc638f854bc92a63 100644
--- a/app/service/MembershipService.ts
+++ b/app/service/MembershipService.ts
@@ -56,13 +56,14 @@ export class MembershipService extends FIFOService {
       const current = await this.dal.getCurrentBlockOrNull();
       const basedBlock = await GLOBAL_RULES_HELPERS.checkMembershipBlock(entry, current, this.conf, this.dal);
       if (!(await this.dal.msDAL.sandbox.acceptNewSandBoxEntry({
-          pubkey: entry.pubkey,
+          issuers: [entry.pubkey],
           block_number: entry.block_number
         }, this.conf.pair && this.conf.pair.pub))) {
         throw constants.ERRORS.SANDBOX_FOR_MEMERSHIP_IS_FULL;
       }
       // Saves entry
       await this.dal.savePendingMembership({
+        issuers: [entry.pubkey],
         membership: entry.membership,
         issuer: entry.issuer,
         number: entry.number,
diff --git a/app/service/TransactionsService.ts b/app/service/TransactionsService.ts
index ab144b243d20b433221959e1eedf2444ad2ac30c..e6ddf1263234920e509ca684438cc19cec1ecb5f 100644
--- a/app/service/TransactionsService.ts
+++ b/app/service/TransactionsService.ts
@@ -46,7 +46,7 @@ export class TransactionService extends FIFOService {
         await GLOBAL_RULES_HELPERS.checkSingleTransaction(dto, nextBlockWithFakeTimeVariation, this.conf, this.dal, CHECK_PENDING_TRANSACTIONS);
         const server_pubkey = this.conf.pair && this.conf.pair.pub;
         if (!(await this.dal.txsDAL.sandbox.acceptNewSandBoxEntry({
-            pubkey: tx.issuers.indexOf(server_pubkey) !== -1 ? server_pubkey : '',
+            issuers: tx.issuers,
             output_base: tx.output_base,
             output_amount: tx.output_amount
           }, server_pubkey))) {
diff --git a/index.ts b/index.ts
index 1086b3aa0bf52983a3c3e05514da232dd6a974c4..ecf7be9d67231df6e4e63ef96c903457272b675d 100644
--- a/index.ts
+++ b/index.ts
@@ -7,7 +7,7 @@ import {KeypairDependency} from "./app/modules/keypair/index"
 import {CrawlerDependency} from "./app/modules/crawler/index"
 import {BmaDependency} from "./app/modules/bma/index"
 import {WS2PDependency} from "./app/modules/ws2p/index"
-import {Constants} from "./app/modules/prover/lib/constants"
+import {ProverConstants} from "./app/modules/prover/lib/constants"
 import { ProxiesConf } from './app/lib/proxy';
 
 const path = require('path');
@@ -486,7 +486,7 @@ function commandLineConf(program:any, conf:any = {}) {
   if (cli.currency)                             conf.currency = cli.currency;
   if (cli.server.port)                          conf.port = cli.server.port;
   if (cli.cpu)                                  conf.cpu = Math.max(0.01, Math.min(1.0, cli.cpu));
-  if (cli.prefix)                               conf.prefix = Math.max(Constants.MIN_PEER_ID, Math.min(Constants.MAX_PEER_ID, cli.prefix));
+  if (cli.prefix)                               conf.prefix = Math.max(ProverConstants.MIN_PEER_ID, Math.min(ProverConstants.MAX_PEER_ID, cli.prefix));
   if (cli.logs.http)                            conf.httplogs = true;
   if (cli.logs.nohttp)                          conf.httplogs = false;
   if (cli.isolate)                              conf.isolate = cli.isolate;
diff --git a/test/dal/triming.js b/test/dal/triming.js
index db2c0cb849343c53b7db558a368729cf7185b440..501ec550e41e568107bbcd4ff9b803038a4e7684 100644
--- a/test/dal/triming.js
+++ b/test/dal/triming.js
@@ -124,10 +124,6 @@ describe("Triming", function(){
   it('should be able to trim the bindex', () => co(function *() {
     // Triming
     const server = (yield toolbox.simpleNodeWith2Users({
-      pair: {
-        pub: 'HgTTJLAQ5sqfknMq7yLPZbehtuLSsKj9CxWN7k8QvYJd',
-        sec: '51w4fEShBk1jCMauWu4mLpmDVfHksKmWcygpxriqCEZizbtERA6de4STKRkQBpxmMUwsKXRjSzuQ8ECwmqN1u2DP'
-      },
       forksize: 9,
       sigQty: 1,
       dtDiffEval: 2,
diff --git a/test/integration/branches_revert2.js b/test/integration/branches_revert2.js
index f5ed04b46d403db7a6e038dbe101fcd5df2b1896..bc85ff5b69d24e2351a9d5710fded4939775ede5 100644
--- a/test/integration/branches_revert2.js
+++ b/test/integration/branches_revert2.js
@@ -10,7 +10,7 @@ const httpTest  = require('./tools/http');
 const commit    = require('./tools/commit');
 const shutDownEngine  = require('./tools/shutDownEngine');
 
-require('../../app/modules/prover/lib/constants').Constants.CORES_MAXIMUM_USE_IN_PARALLEL = 1
+require('../../app/modules/prover/lib/constants').ProverConstants.CORES_MAXIMUM_USE_IN_PARALLEL = 1
 require('../../app/modules/bma').BmaDependency.duniter.methods.noLimit(); // Disables the HTTP limiter
 
 const expectJSON     = httpTest.expectJSON;
diff --git a/test/integration/documents-currency.ts b/test/integration/documents-currency.ts
index c066ab2a45db115898320eb1a894f793ded8cd0a..a97afd54206967a360beb54e2ba528117ae7c2eb 100644
--- a/test/integration/documents-currency.ts
+++ b/test/integration/documents-currency.ts
@@ -1,4 +1,7 @@
-import {NewTestingServer} from './tools/toolbox';
+import { NewTestingServer, TestingServer } from './tools/toolbox';
+import { unlock } from '../../app/lib/common-libs/txunlock';
+import { ConfDTO, CurrencyConfDTO } from '../../app/lib/dto/ConfDTO';
+import { Server } from '../../server';
 
 const co        = require('co');
 const should    = require('should');
@@ -15,20 +18,20 @@ describe("Document pool currency", function() {
     s1 = NewTestingServer({
       currency: 'currency_one',
       pair: {
-        pub: 'HgTTJLAQ5sqfknMq7yLPZbehtuLSsKj9CxWN7k8QvYJd',
-        sec: '51w4fEShBk1jCMauWu4mLpmDVfHksKmWcygpxriqCEZizbtERA6de4STKRkQBpxmMUwsKXRjSzuQ8ECwmqN1u2DP'
-      },
-      udTime0: now - 1,
-      dt: 1,
-      ud0: 1500
-    });
-    s2 = NewTestingServer({
-      currency: 'currency_two',
-      pair: {
-        pub: 'DKpQPUL4ckzXYdnDRvCRKAm1gNvSdmAXnTrJZ7LvM5Qo',
-        sec: '64EYRvdPpTfLGGmaX5nijLXRqWXaVz8r1Z1GtaahXwVSJGQRn7tqkxLb288zwSYzELMEG5ZhXSBYSxsTsz1m9y8F'
-      }
-    });
+          pub: 'HgTTJLAQ5sqfknMq7yLPZbehtuLSsKj9CxWN7k8QvYJd',
+          sec: '51w4fEShBk1jCMauWu4mLpmDVfHksKmWcygpxriqCEZizbtERA6de4STKRkQBpxmMUwsKXRjSzuQ8ECwmqN1u2DP'
+        },
+        udTime0: now - 1,
+        dt: 1,
+        ud0: 1500
+      });
+      s2 = NewTestingServer({
+        currency: 'currency_two',
+        pair: {
+          pub: 'DKpQPUL4ckzXYdnDRvCRKAm1gNvSdmAXnTrJZ7LvM5Qo',
+          sec: '64EYRvdPpTfLGGmaX5nijLXRqWXaVz8r1Z1GtaahXwVSJGQRn7tqkxLb288zwSYzELMEG5ZhXSBYSxsTsz1m9y8F'
+        }
+      });
 
     cat1 = new TestUser('cat', { pub: 'HgTTJLAQ5sqfknMq7yLPZbehtuLSsKj9CxWN7k8QvYJd', sec: '51w4fEShBk1jCMauWu4mLpmDVfHksKmWcygpxriqCEZizbtERA6de4STKRkQBpxmMUwsKXRjSzuQ8ECwmqN1u2DP'}, { server: s1 });
     tac1 = new TestUser('tac', { pub: '2LvDg21dVXvetTD9GdkPLURavLYEqP3whauvPWX4c2qc', sec: '2HuRLWgKgED1bVio1tdpeXrf7zuUszv1yPHDsDj7kcMC4rVSN9RC58ogjtKNfTbH1eFz7rn38U1PywNs3m6Q7UxE'}, { server: s1 });
diff --git a/test/integration/http_api.js b/test/integration/http_api.js
index 088909ecfb74aecafbd7b4eefa3df18412ee8f19..83cd3ccb202b102879c48a2bbed2170436992c67 100644
--- a/test/integration/http_api.js
+++ b/test/integration/http_api.js
@@ -13,7 +13,7 @@ const shutDownEngine  = require('./tools/shutDownEngine');
 const rp        = require('request-promise');
 const ws        = require('ws');
 
-require('../../app/modules/prover/lib/constants').Constants.CORES_MAXIMUM_USE_IN_PARALLEL = 1
+require('../../app/modules/prover/lib/constants').ProverConstants.CORES_MAXIMUM_USE_IN_PARALLEL = 1
 
 let server, server2, cat, toc
 
diff --git a/test/integration/server-shutdown.ts b/test/integration/server-shutdown.ts
index 854e20eae037d8e801a7d1fab6b827033b43b0e9..033ef307691e3a2ea9d19c879c69a967fc81fae4 100644
--- a/test/integration/server-shutdown.ts
+++ b/test/integration/server-shutdown.ts
@@ -1,3 +1,5 @@
+import { ConfDTO } from '../../app/lib/dto/ConfDTO';
+import { setTimeout } from 'timers';
 import {NewTestingServer} from "./tools/toolbox"
 
 const should = require('should')
diff --git a/yarn.lock b/yarn.lock
index 1eb4771b3e9bcb9e2754620a0b6c49a056790519..e31a5cf3ec6018745c32e2924443a74d95dfaf8d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -51,6 +51,10 @@ acorn@^5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.1.1.tgz#53fe161111f912ab999ee887a90a0bc52822fd75"
 
+adm-zip@0.4.7:
+  version "0.4.7"
+  resolved "https://registry.yarnpkg.com/adm-zip/-/adm-zip-0.4.7.tgz#8606c2cbf1c426ce8c8ec00174447fd49b6eafc1"
+
 ajv-keywords@^1.0.0:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-1.5.1.tgz#314dd0a4b3368fad3dfcdc54ede6171b886daf3c"
@@ -902,6 +906,28 @@ doctrine@^1.2.2:
     esutils "^2.0.2"
     isarray "^1.0.0"
 
+duniter-ui@^1.6.13:
+  version "1.6.13"
+  resolved "https://registry.yarnpkg.com/duniter-ui/-/duniter-ui-1.6.13.tgz#3f203152fc0e3e1cbae74c1a0353a620c82d72ee"
+  dependencies:
+    adm-zip "0.4.7"
+    body-parser "1.17.1"
+    co "4.6.0"
+    cors "2.8.2"
+    event-stream "3.3.4"
+    express "4.15.2"
+    express-fileupload "0.0.5"
+    fs-extra "2.1.2"
+    materialize-css "0.98.1"
+    moment "2.18.1"
+    node-pre-gyp "0.6.34"
+    q "1.5.0"
+    request "2.81.0"
+    request-promise "4.2.0"
+    rimraf "2.6.1"
+    tmp "0.0.31"
+    underscore "1.8.3"
+
 duplexer@~0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/duplexer/-/duplexer-0.1.1.tgz#ace6ff808c1ce66b57d1ebf97977acb02334cfc1"
@@ -1410,6 +1436,13 @@ from@~0:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/from/-/from-0.1.7.tgz#83c60afc58b9c56997007ed1a768b3ab303a44fe"
 
+fs-extra@2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-2.1.2.tgz#046c70163cef9aad46b0e4a7fa467fb22d71de35"
+  dependencies:
+    graceful-fs "^4.1.2"
+    jsonfile "^2.1.0"
+
 fs-extra@^0.22.1:
   version "0.22.1"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-0.22.1.tgz#5fd6f8049dc976ca19eb2355d658173cabcce056"
@@ -1577,6 +1610,10 @@ growl@1.9.2:
   version "1.9.2"
   resolved "https://registry.yarnpkg.com/growl/-/growl-1.9.2.tgz#0ea7743715db8d8de2c5ede1775e1b45ac85c02f"
 
+hammerjs@^2.0.4:
+  version "2.0.8"
+  resolved "https://registry.yarnpkg.com/hammerjs/-/hammerjs-2.0.8.tgz#04ef77862cff2bb79d30f7692095930222bf60f1"
+
 handlebars@^4.0.3:
   version "4.0.10"
   resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.0.10.tgz#3d30c718b09a3d96f23ea4cc1f403c4d3ba9ff4f"
@@ -1997,6 +2034,10 @@ jison@0.4.17:
     lex-parser "~0.1.3"
     nomnom "1.5.2"
 
+jquery@^2.1.4:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/jquery/-/jquery-2.2.4.tgz#2c89d6889b5eac522a7eea32c14521559c6cbf02"
+
 js-tokens@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
@@ -2254,6 +2295,14 @@ map-stream@~0.1.0:
     buffers "~0.1.1"
     readable-stream "~1.0.0"
 
+materialize-css@0.98.1:
+  version "0.98.1"
+  resolved "https://registry.yarnpkg.com/materialize-css/-/materialize-css-0.98.1.tgz#7276895b2c998b53e26deaa0c23a0484c0851d99"
+  dependencies:
+    hammerjs "^2.0.4"
+    jquery "^2.1.4"
+    node-archiver "^0.3.0"
+
 md5-hex@^1.2.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/md5-hex/-/md5-hex-1.3.0.tgz#d2c4afe983c4370662179b8cad145219135046c4"
@@ -2482,6 +2531,13 @@ nnupnp@1.0.2:
     request "2.10.0"
     xml2js "0.1.14"
 
+node-archiver@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/node-archiver/-/node-archiver-0.3.0.tgz#b9f1afe5006d0bdf29260181833a070978bc6947"
+  dependencies:
+    fstream "^1.0.10"
+    tar "^2.2.1"
+
 node-pre-gyp@0.6.23:
   version "0.6.23"
   resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.6.23.tgz#155bf3683abcfcde008aedab1248891a0773db95"
@@ -2899,7 +2955,7 @@ q-io@1.13.2:
     qs "^1.2.1"
     url2 "^0.0.0"
 
-q@^1.0.1:
+q@1.5.0, q@^1.0.1:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/q/-/q-1.5.0.tgz#dd01bac9d06d30e6f219aecb8253ee9ebdc308f1"
 
@@ -3204,7 +3260,7 @@ right-align@^0.1.1:
   dependencies:
     align-text "^0.1.1"
 
-rimraf@2, rimraf@^2.2.8, rimraf@^2.3.3, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1:
+rimraf@2, rimraf@2.6.1, rimraf@^2.2.8, rimraf@^2.3.3, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1:
   version "2.6.1"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.1.tgz#c2338ec643df7a1b7fe5c54fa86f57428a55f33d"
   dependencies:
@@ -3311,7 +3367,7 @@ setprototypeof@1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.0.3.tgz#66567e37043eeb4f04d91bd658c0cbefb55b8e04"
 
-sha1@:
+sha1@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/sha1/-/sha1-1.1.1.tgz#addaa7a93168f393f19eb2b15091618e2700f848"
   dependencies:
@@ -3714,7 +3770,7 @@ tmp@0.0.29:
   dependencies:
     os-tmpdir "~1.0.1"
 
-tmp@^0.0.31:
+tmp@0.0.31, tmp@^0.0.31:
   version "0.0.31"
   resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.31.tgz#8f38ab9438e17315e5dbd8b3657e8bfb277ae4a7"
   dependencies: