diff --git a/integration/ocean/Signature.test.ts b/integration/ocean/Signature.test.ts
index f9afbaf..64ed982 100644
--- a/integration/ocean/Signature.test.ts
+++ b/integration/ocean/Signature.test.ts
@@ -5,14 +5,11 @@ import { config } from "../config"
 
 import { Ocean, Account, DDO } from "../../src" // @oceanprotocol/squid
 
-import ServiceAgreement from "../../src/ocean/ServiceAgreements/ServiceAgreement"
-
 // WARN: not integration test. It has been done here because constant values
 // depends on the first account on spree (only accessible from integration test)
 describe("Signature", () => {
 
     let ocean: Ocean
-    let web3: Web3
     let consumer: Account
 
     before(async () => {
@@ -21,7 +18,6 @@ describe("Signature", () => {
             web3Provider: new (Web3 as any).providers
                 .HttpProvider("http://localhost:8545", 0, "0x00Bd138aBD70e2F00903268F3Db08f2D25677C9e", "node0"),
         })
-        web3 = (ocean as any).web3
 
         // Accounts
         consumer = new Account("0x00bd138abd70e2f00903268f3db08f2d25677c9e")
@@ -36,7 +32,7 @@ describe("Signature", () => {
         const lockId = `0x${"b".repeat(64)}`
         const escrowId = `0x${"c".repeat(64)}`
 
-        const hash = await ServiceAgreement.hashServiceAgreement(
+        const hash = await ocean.utils.agreements.hashServiceAgreement(
             templateId,
             agreementId,
             [accessId, lockId, escrowId],
@@ -82,8 +78,7 @@ describe("Signature", () => {
         const agreementConditionIds = await templates.escrowAccessSecretStoreTemplate
             .getAgreementIdsFromDDO(agreementId, ddo, consumer.getId(), consumer.getId())
 
-        const signature = await ServiceAgreement.signServiceAgreement(
-            web3,
+        const signature = await ocean.utils.agreements.signServiceAgreement(
             ddo,
             serviceDefinitionId,
             agreementId,
diff --git a/package-lock.json b/package-lock.json
index fab9e1f..f5abc36 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -129,9 +129,9 @@
       }
     },
     "@oceanprotocol/keeper-contracts": {
-      "version": "0.8.5",
-      "resolved": "https://registry.npmjs.org/@oceanprotocol/keeper-contracts/-/keeper-contracts-0.8.5.tgz",
-      "integrity": "sha512-GRVsKAAX60PikLyeA6SEPm1NKOPCHW5C225H4Cpe+hww+qEbGu7Y2/Y+svWSXzfxElUanRZBdZfiEx4tdudIoQ=="
+      "version": "0.8.6",
+      "resolved": "https://registry.npmjs.org/@oceanprotocol/keeper-contracts/-/keeper-contracts-0.8.6.tgz",
+      "integrity": "sha512-WdIDedXZSS+AG3/K+issOJQ4Jmg0UtdNPpi1Ogo+sFogmYIa21m06pqvuAKK8tGG2o+KBW8nBUMyyA3mR2j+vg=="
     },
     "@oceanprotocol/secret-store-client": {
       "version": "0.0.14",
@@ -1158,12 +1158,6 @@
         "unset-value": "^1.0.0"
       }
     },
-    "camelcase": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
-      "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
-      "dev": true
-    },
     "caseless": {
       "version": "0.12.0",
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
@@ -1250,12 +1244,6 @@
         "safe-buffer": "^5.0.1"
       }
     },
-    "circular-json": {
-      "version": "0.5.9",
-      "resolved": "https://registry.npmjs.org/circular-json/-/circular-json-0.5.9.tgz",
-      "integrity": "sha512-4ivwqHpIFJZBuhN3g/pEcdbnGUywkBblloGbkglyloVjjR3uT6tieI89MVOfbP2tHX5sgb01FuLgAOzebNlJNQ==",
-      "dev": true
-    },
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -1581,15 +1569,6 @@
         "ms": "2.0.0"
       }
     },
-    "decamelize": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-2.0.0.tgz",
-      "integrity": "sha512-Ikpp5scV3MSYxY39ymh45ZLEecsTdv/Xj2CaQfI8RLMuwi7XvjX9H/fhraiSuU+C5w5NTDu4ZU72xNiZnurBPg==",
-      "dev": true,
-      "requires": {
-        "xregexp": "4.0.0"
-      }
-    },
     "decode-uri-component": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
@@ -2122,34 +2101,6 @@
         "safe-buffer": "^5.1.1"
       }
     },
-    "execa": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/execa/-/execa-0.7.0.tgz",
-      "integrity": "sha1-lEvs00zEHuMqY6n68nrVpl/Fl3c=",
-      "dev": true,
-      "requires": {
-        "cross-spawn": "^5.0.1",
-        "get-stream": "^3.0.0",
-        "is-stream": "^1.1.0",
-        "npm-run-path": "^2.0.0",
-        "p-finally": "^1.0.0",
-        "signal-exit": "^3.0.0",
-        "strip-eof": "^1.0.0"
-      },
-      "dependencies": {
-        "cross-spawn": {
-          "version": "5.1.0",
-          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
-          "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
-          "dev": true,
-          "requires": {
-            "lru-cache": "^4.0.1",
-            "shebang-command": "^1.2.0",
-            "which": "^1.2.9"
-          }
-        }
-      }
-    },
     "expand-brackets": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
@@ -2626,7 +2577,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -2647,12 +2599,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -2673,12 +2627,14 @@
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -2795,7 +2751,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -2822,6 +2779,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -2829,12 +2787,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -2853,6 +2813,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -2946,6 +2907,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -3031,7 +2993,8 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -3067,6 +3030,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -3086,6 +3050,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -3129,12 +3094,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -3597,12 +3564,6 @@
       "integrity": "sha512-mT34yGKMNceBQUoVn7iCDKDntA7SC6gycMAWzGx1z/CMCTV7b2AAtXlo3nRyHZ1FelRkQbQjprHSYGwzLtkVbw==",
       "dev": true
     },
-    "invert-kv": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/invert-kv/-/invert-kv-1.0.0.tgz",
-      "integrity": "sha1-EEqOSqym09jNFXqO+L+rLXo//bY=",
-      "dev": true
-    },
     "ipaddr.js": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.8.0.tgz",
@@ -4065,15 +4026,6 @@
         "readable-stream": "^2.0.5"
       }
     },
-    "lcid": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/lcid/-/lcid-1.0.0.tgz",
-      "integrity": "sha1-MIrMr6C8SDo4Z7S28rlQYlHRuDU=",
-      "dev": true,
-      "requires": {
-        "invert-kv": "^1.0.0"
-      }
-    },
     "lcov-result-merger": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/lcov-result-merger/-/lcov-result-merger-3.1.0.tgz",
@@ -4137,16 +4089,6 @@
       "resolved": "https://registry.npmjs.org/lowercase-keys/-/lowercase-keys-1.0.1.tgz",
       "integrity": "sha512-G2Lj61tXDnVFFOi8VZds+SoQjtQC3dgokKdDG2mTm1tx4m50NUHBOZSBwQQHyy0V12A0JTG4icfZQH+xPyh8VA=="
     },
-    "lru-cache": {
-      "version": "4.1.5",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.5.tgz",
-      "integrity": "sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==",
-      "dev": true,
-      "requires": {
-        "pseudomap": "^1.0.2",
-        "yallist": "^2.1.2"
-      }
-    },
     "make-dir": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-1.3.0.tgz",
@@ -4219,15 +4161,6 @@
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
       "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g="
     },
-    "mem": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/mem/-/mem-1.1.0.tgz",
-      "integrity": "sha1-Xt1StIXKHZAP5kiVUFOZoN+kX3Y=",
-      "dev": true,
-      "requires": {
-        "mimic-fn": "^1.0.0"
-      }
-    },
     "memory-fs": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/memory-fs/-/memory-fs-0.4.1.tgz",
@@ -4296,12 +4229,6 @@
         "mime-db": "~1.38.0"
       }
     },
-    "mimic-fn": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-1.2.0.tgz",
-      "integrity": "sha512-jf84uxzwiuiIVKiOLpfYk7N46TSy8ubTonmneY9vrpHNAnp0QBt2BxWV9dO3/j+BoVAb+a5G6YDPW3M5HOdMWQ==",
-      "dev": true
-    },
     "mimic-response": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.1.tgz",
@@ -4443,28 +4370,6 @@
         }
       }
     },
-    "mocha-parallel-tests": {
-      "version": "2.0.6-alpha.3",
-      "resolved": "https://registry.npmjs.org/mocha-parallel-tests/-/mocha-parallel-tests-2.0.6-alpha.3.tgz",
-      "integrity": "sha512-yyCObs84loUFbLim3KfeucKeSULudEoDNbOsNuJ/hdwj1vsIVr1bs1Tsk30OAMCpSdi7vUhvU9uIO8nJ3t62FQ==",
-      "dev": true,
-      "requires": {
-        "circular-json": "^0.5.4",
-        "debug": "3.1.0",
-        "yargs": "12.0.1"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "3.1.0",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
-          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
-          "dev": true,
-          "requires": {
-            "ms": "2.0.0"
-          }
-        }
-      }
-    },
     "mock-fs": {
       "version": "4.8.0",
       "resolved": "https://registry.npmjs.org/mock-fs/-/mock-fs-4.8.0.tgz",
@@ -5822,17 +5727,6 @@
       "integrity": "sha1-hUNzx/XCMVkU/Jv8a9gjj92h7Cc=",
       "dev": true
     },
-    "os-locale": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-2.1.0.tgz",
-      "integrity": "sha512-3sslG3zJbEYcaC4YVAvDorjGxc7tv6KVATnLPZONiljsUncvihe9BQoVCEs0RZ1kmf4Hk9OBqlZfJZWI4GanKA==",
-      "dev": true,
-      "requires": {
-        "execa": "^0.7.0",
-        "lcid": "^1.0.0",
-        "mem": "^1.1.0"
-      }
-    },
     "p-cancelable": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/p-cancelable/-/p-cancelable-0.3.0.tgz",
@@ -6086,12 +5980,6 @@
       "integrity": "sha1-0/wRS6BplaRexok/SEzrHXj19HY=",
       "dev": true
     },
-    "pseudomap": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
-      "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM=",
-      "dev": true
-    },
     "psl": {
       "version": "1.1.31",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.1.31.tgz",
@@ -8207,7 +8095,7 @@
       "requires": {
         "underscore": "1.8.3",
         "web3-core-helpers": "1.0.0-beta.37",
-        "websocket": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2"
+        "websocket": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible"
       }
     },
     "web3-shh": {
@@ -8611,12 +8499,6 @@
       "resolved": "https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1.8.0.tgz",
       "integrity": "sha1-Z/4HXFwk/vOfnWX197f+dRcZaPw="
     },
-    "xregexp": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/xregexp/-/xregexp-4.0.0.tgz",
-      "integrity": "sha512-PHyM+sQouu7xspQQwELlGwwd05mXUFqwFYfqPO0cC7x4fxyHnnuetmQr6CjJiafIDoH4MogHb9dOoJzR/Y4rFg==",
-      "dev": true
-    },
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
@@ -8633,41 +8515,6 @@
       "resolved": "https://registry.npmjs.org/yaeti/-/yaeti-0.0.6.tgz",
       "integrity": "sha1-8m9ITXJoTPQr7ft2lwqhYI+/lXc="
     },
-    "yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
-      "dev": true
-    },
-    "yargs": {
-      "version": "12.0.1",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.1.tgz",
-      "integrity": "sha512-B0vRAp1hRX4jgIOWFtjfNjd9OA9RWYZ6tqGA9/I/IrTMsxmKvtWy+ersM+jzpQqbC3YfLzeABPdeTgcJ9eu1qQ==",
-      "dev": true,
-      "requires": {
-        "cliui": "^4.0.0",
-        "decamelize": "^2.0.0",
-        "find-up": "^3.0.0",
-        "get-caller-file": "^1.0.1",
-        "os-locale": "^2.0.0",
-        "require-directory": "^2.1.1",
-        "require-main-filename": "^1.0.1",
-        "set-blocking": "^2.0.0",
-        "string-width": "^2.0.0",
-        "which-module": "^2.0.0",
-        "y18n": "^3.2.1 || ^4.0.0",
-        "yargs-parser": "^10.1.0"
-      }
-    },
-    "yargs-parser": {
-      "version": "10.1.0",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
-      "integrity": "sha512-VCIyR1wJoEBZUqk5PA+oOBF6ypbwh5aNB3I50guxAL/quggdfs4TtNHQrSazFA3fYZ+tEqfs0zIGlv0c/rgjbQ==",
-      "dev": true,
-      "requires": {
-        "camelcase": "^4.1.0"
-      }
-    },
     "yauzl": {
       "version": "2.10.0",
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
diff --git a/package.json b/package.json
index f7432a8..3d21a92 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
   },
   "homepage": "https://github.com/oceanprotocol/squid-js#readme",
   "dependencies": {
-    "@oceanprotocol/keeper-contracts": "^0.8.5",
+    "@oceanprotocol/keeper-contracts": "^0.8.6",
     "@oceanprotocol/secret-store-client": "~0.0.14",
     "bignumber.js": "^8.0.1",
     "deprecated-decorator": "^0.1.6",
diff --git a/src/ddo/DDO.ts b/src/ddo/DDO.ts
index 79f2552..909757b 100644
--- a/src/ddo/DDO.ts
+++ b/src/ddo/DDO.ts
@@ -1,7 +1,7 @@
 import * as Web3 from "web3"
 import Web3Provider from "../keeper/Web3Provider"
 import LoggerInstance from "../utils/Logger"
-import * as signatureHelpers from "../utils/SignatureHelpers"
+import { Ocean } from "../ocean/Ocean"
 import { Authentication } from "./Authentication"
 import { Proof } from "./Proof"
 import { PublicKey } from "./PublicKey"
@@ -112,10 +112,10 @@ export class DDO {
      * @param  {string}         password  Password if it's requirted.
      * @return {Promise<Proof>}           Proof object.
      */
-    public async generateProof(web3: Web3, publicKey: string, password?: string): Promise<Proof> {
+    public async generateProof(ocean: Ocean, publicKey: string, password?: string): Promise<Proof> {
         const checksum = this.getChecksum()
 
-        const signature = await signatureHelpers.signText(web3, checksum, publicKey, password)
+        const signature = await ocean.utils.signature.signText(checksum, publicKey, password)
 
         return {
             created: (new Date()).toISOString(),
diff --git a/src/ocean/Ocean.ts b/src/ocean/Ocean.ts
index 64c5676..e6c78ee 100644
--- a/src/ocean/Ocean.ts
+++ b/src/ocean/Ocean.ts
@@ -3,6 +3,7 @@ import { OceanAgreements } from "./OceanAgreements"
 import { OceanAssets } from "./OceanAssets"
 import { OceanSecretStore } from "./OceanSecretStore"
 import { OceanTokens } from "./OceanTokens"
+import { OceanUtils } from "./utils/OceanUtils"
 
 import { Aquarius } from "../aquarius/Aquarius"
 import { Brizo } from "../brizo/Brizo"
@@ -43,6 +44,8 @@ export class Ocean extends Instantiable {
         instance.secretStore = await OceanSecretStore.getInstance(instanceConfig)
         instance.tokens = await OceanTokens.getInstance(instanceConfig)
 
+        instance.utils = await OceanUtils.getInstance(instanceConfig)
+
         return instance
     }
 
@@ -94,6 +97,12 @@ export class Ocean extends Instantiable {
      */
     public tokens: OceanTokens
 
+    /**
+     * Ocean utils submodule
+     * @type {OceanUtils}
+     */
+    public utils: OceanUtils
+
     private constructor() {
         super()
     }
diff --git a/src/ocean/OceanAgreements.ts b/src/ocean/OceanAgreements.ts
index e137742..d3dd405 100644
--- a/src/ocean/OceanAgreements.ts
+++ b/src/ocean/OceanAgreements.ts
@@ -1,7 +1,6 @@
 import { generateId } from "../utils/GeneratorHelpers"
 import Account from "./Account"
 import DID from "./DID"
-import ServiceAgreement from "./ServiceAgreements/ServiceAgreement"
 import { zeroX, didPrefixed } from "../utils"
 import { Instantiable, InstantiableConfig } from "../Instantiable.abstract"
 
@@ -57,8 +56,7 @@ export class OceanAgreements extends Instantiable {
             .getTemplateByName(templateName)
             .getAgreementIdsFromDDO(agreementId, ddo, consumer.getId(), consumer.getId())
 
-        const signature = await ServiceAgreement.signServiceAgreement(
-            this.web3,
+        const signature = await this.ocean.utils.agreements.signServiceAgreement(
             ddo,
             serviceDefinitionId,
             agreementId,
diff --git a/src/ocean/OceanAssets.ts b/src/ocean/OceanAssets.ts
index 198629a..6f989d5 100644
--- a/src/ocean/OceanAssets.ts
+++ b/src/ocean/OceanAssets.ts
@@ -135,7 +135,7 @@ export class OceanAssets extends Instantiable {
         serviceAgreementTemplate.conditions = conditions
 
         ddo.addChecksum()
-        await ddo.addProof(this.web3, publisher.getId(), publisher.getPassword())
+        await ddo.addProof(this.ocean, publisher.getId(), publisher.getPassword())
 
         const storedDdo = await this.ocean.aquarius.storeDDO(ddo)
         await didRegistry.registerAttribute(
diff --git a/src/ocean/utils/OceanUtils.ts b/src/ocean/utils/OceanUtils.ts
new file mode 100644
index 0000000..5b7d6df
--- /dev/null
+++ b/src/ocean/utils/OceanUtils.ts
@@ -0,0 +1,36 @@
+import { Instantiable, InstantiableConfig } from "../../Instantiable.abstract"
+
+import { ServiceAgreement } from "./ServiceAgreement"
+import { SignatureUtils } from "./SignatureUtils"
+
+/**
+ * Utils internal submodule of Ocean Protocol.
+ */
+export class OceanUtils extends Instantiable {
+
+    /**
+     * Returns the instance of OceanUtils.
+     * @return {Promise<OceanUtils>}
+     */
+    public static async getInstance(config: InstantiableConfig): Promise<OceanUtils> {
+        const instance = new OceanUtils()
+        instance.setInstanceConfig(config)
+
+        instance.agreements = new ServiceAgreement(config)
+        instance.signature = new SignatureUtils(config)
+
+        return instance
+    }
+
+    /**
+     * Agreement utils.
+     * @type {ServiceAgreement}
+     */
+    public agreements: ServiceAgreement
+
+    /**
+     * Signature utils.
+     * @type {SignatureUtils}
+     */
+    public signature: SignatureUtils
+}
diff --git a/src/ocean/ServiceAgreements/ServiceAgreement.ts b/src/ocean/utils/ServiceAgreement.ts
similarity index 61%
rename from src/ocean/ServiceAgreements/ServiceAgreement.ts
rename to src/ocean/utils/ServiceAgreement.ts
index 0b301d3..3de46a2 100644
--- a/src/ocean/ServiceAgreements/ServiceAgreement.ts
+++ b/src/ocean/utils/ServiceAgreement.ts
@@ -2,16 +2,18 @@ import * as Web3 from "web3"
 import { ServiceAgreementTemplateCondition } from "../../ddo/ServiceAgreementTemplate"
 import { DDO } from "../../ddo/DDO"
 import { ServiceAccess } from "../../ddo/Service"
-import LoggerInstance from "../../utils/Logger"
-import Web3Provider from "../../keeper/Web3Provider"
 import Account from "../Account"
-import { signText, zeroX } from "../../utils"
+import { zeroX } from "../../utils"
+import { Instantiable, InstantiableConfig } from "../../Instantiable.abstract"
 
-// TODO: move this class to helpers, it only contains pure functions
-export default class ServiceAgreement {
+export class ServiceAgreement extends Instantiable {
 
-    public static async signServiceAgreement(
-        web3: Web3,
+    constructor(config: InstantiableConfig) {
+        super()
+        this.setInstanceConfig(config)
+    }
+
+    public async signServiceAgreement(
         ddo: DDO,
         serviceDefinitionId: string,
         serviceAgreementId: string,
@@ -20,15 +22,14 @@ export default class ServiceAgreement {
     ): Promise<string> {
 
         const service = ddo.findServiceById<"Access">(serviceDefinitionId)
-        const timelockValues: number[] = ServiceAgreement.getTimeValuesFromService(service, "timelock")
-        const timeoutValues: number[] = ServiceAgreement.getTimeValuesFromService(service, "timeout")
+        const timelockValues: number[] = this.getTimeValuesFromService(service, "timelock")
+        const timeoutValues: number[] = this.getTimeValuesFromService(service, "timeout")
 
         if (!service.templateId) {
             throw new Error("TemplateId not found in DDO.")
         }
 
-        const serviceAgreementHashSignature = await ServiceAgreement.createHashSignature(
-            web3,
+        const serviceAgreementHashSignature = await this.createHashSignature(
             service.templateId,
             serviceAgreementId,
             agreementConditionsIds,
@@ -37,13 +38,12 @@ export default class ServiceAgreement {
             consumer,
         )
 
-        LoggerInstance.log("SA hash signature:", serviceAgreementHashSignature)
+        this.logger.debug("SA hash signature:", serviceAgreementHashSignature)
 
         return serviceAgreementHashSignature
     }
 
-    public static async createHashSignature(
-        web3: Web3,
+    public async createHashSignature(
         templateId: string,
         serviceAgreementId: string,
         valueHashes: string[],
@@ -52,7 +52,7 @@ export default class ServiceAgreement {
         consumer: Account,
     ): Promise<string> {
 
-        const serviceAgreementHash = ServiceAgreement.hashServiceAgreement(
+        const serviceAgreementHash = this.hashServiceAgreement(
             templateId,
             serviceAgreementId,
             valueHashes,
@@ -60,12 +60,13 @@ export default class ServiceAgreement {
             timeoutValues,
         )
 
-        const serviceAgreementHashSignature = await signText(web3, serviceAgreementHash, consumer.getId(), consumer.getPassword())
+        const serviceAgreementHashSignature = await this.ocean.utils.signature
+            .signText(serviceAgreementHash, consumer.getId(), consumer.getPassword())
 
         return serviceAgreementHashSignature
     }
 
-    public static hashServiceAgreement(
+    public hashServiceAgreement(
         serviceAgreementTemplateId: string,
         serviceAgreementId: string,
         valueHashes: string[],
@@ -81,10 +82,10 @@ export default class ServiceAgreement {
             {type: "bytes32", value: zeroX(serviceAgreementId)},
         ]
 
-        return (Web3Provider as any).getWeb3().utils.soliditySha3(...args).toString("hex")
+        return this.web3.utils.soliditySha3(...args).toString("hex")
     }
 
-    private static getTimeValuesFromService(service: ServiceAccess, type: "timeout" | "timelock"): number[] {
+    private getTimeValuesFromService(service: ServiceAccess, type: "timeout" | "timelock"): number[] {
         const timeoutValues: number[] = service.serviceAgreementTemplate.conditions
             .map((condition: ServiceAgreementTemplateCondition) => condition[type])
 
diff --git a/src/ocean/utils/SignatureUtils.ts b/src/ocean/utils/SignatureUtils.ts
new file mode 100644
index 0000000..c642aa3
--- /dev/null
+++ b/src/ocean/utils/SignatureUtils.ts
@@ -0,0 +1,31 @@
+import * as Web3 from "web3"
+
+import { Instantiable, InstantiableConfig } from "../../Instantiable.abstract"
+
+export class SignatureUtils extends Instantiable {
+
+    constructor(config: InstantiableConfig) {
+        super()
+        this.setInstanceConfig(config)
+    }
+
+    public async signText(text: string, publicKey: string, password?: string): Promise<string> {
+        try {
+            return await this.web3.eth.personal.sign(text, publicKey, password)
+        } catch (e) {
+            this.logger.warn("Error on personal sign.")
+            this.logger.warn(e)
+            try {
+                return await this.web3.eth.sign(text, publicKey, password)
+            } catch (e2) {
+                this.logger.error("Error on sign.")
+                this.logger.error(e2)
+                throw new Error("Error executing personal sign")
+            }
+        }
+    }
+
+    public async verifyText(text: string, signature: string): Promise<string> {
+        return await this.web3.eth.personal.ecRecover(text, signature)
+    }
+}
diff --git a/src/utils/SignatureHelpers.ts b/src/utils/SignatureHelpers.ts
deleted file mode 100644
index d2010b2..0000000
--- a/src/utils/SignatureHelpers.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import * as Web3 from "web3"
-import LoggerInstance from "./Logger"
-
-export async function signText(web3: Web3, text: string, publicKey: string, password?: string): Promise<string> {
-    try {
-        return await web3.eth.personal.sign(text, publicKey, password)
-    } catch (e) {
-        LoggerInstance.error("Error on personal sign.")
-        LoggerInstance.error(e)
-        try {
-            return await web3.eth.sign(text, publicKey, password)
-        } catch (e2) {
-            LoggerInstance.error("Error on sign.")
-            LoggerInstance.error(e2)
-            throw new Error("Error executing personal sign")
-        }
-    }
-}
-
-export async function verifyText(web3: Web3, text: string, signature: string): Promise<string> {
-    return await web3.eth.personal.ecRecover(text, signature)
-}
diff --git a/src/utils/index.ts b/src/utils/index.ts
index f766a2c..9abf108 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -1,5 +1,4 @@
 export * from "./Logger"
-export * from "./SignatureHelpers"
 export * from "./ConversionTypeHelpers"
 export * from "./GeneratorHelpers"
 export * from "./DDOHelpers"
diff --git a/test/ddo/DDO.test.ts b/test/ddo/DDO.test.ts
index 5de2dea..1459913 100644
--- a/test/ddo/DDO.test.ts
+++ b/test/ddo/DDO.test.ts
@@ -4,7 +4,6 @@ import * as Web3 from "web3"
 
 import { DDO } from "../../src/ddo/DDO"
 import { Service } from "../../src/ddo/Service"
-import * as signatureHelpers from "../../src/utils/SignatureHelpers"
 import { Ocean } from "../../src/ocean/Ocean"
 import config from "../config"
 import TestContractHandler from "../keeper/TestContractHandler"
@@ -165,10 +164,12 @@ describe("DDO", () => {
     })
 
     let web3: Web3
+    let ocean: Ocean
 
     beforeEach(async () => {
         await TestContractHandler.prepareContracts()
-        web3 = (await Ocean.getInstance(config) as any).web3
+        ocean = await Ocean.getInstance(config)
+        web3 = (ocean as any).web3
     })
 
     afterEach(() => {
@@ -256,10 +257,10 @@ describe("DDO", () => {
         const signature = `0x${"a".repeat(130)}`
 
         it("should properly generate the proof", async () => {
-            const signTextSpy = spy.on(signatureHelpers, "signText", () => signature)
+            const signTextSpy = spy.on(ocean.utils.signature, "signText", () => signature)
             const ddo = new DDO(testDDO)
             const checksum = ddo.getChecksum()
-            const proof = await ddo.generateProof(web3, publicKey)
+            const proof = await ddo.generateProof(ocean, publicKey)
 
             assert.include(proof as any, {
                 creator: publicKey,
diff --git a/test/ocean/Ocean.test.ts b/test/ocean/Ocean.test.ts
index 87d13e6..a1b7103 100644
--- a/test/ocean/Ocean.test.ts
+++ b/test/ocean/Ocean.test.ts
@@ -2,37 +2,27 @@ import { assert, spy, use } from "chai"
 import * as spies from "chai-spies"
 
 import { SearchQuery } from "../../src/aquarius/query/SearchQuery"
-import { DDO } from "../../src/ddo/DDO"
 import Account from "../../src/ocean/Account"
 import { Ocean } from "../../src/ocean/Ocean"
-import * as signatureHelpers from "../../src/utils/SignatureHelpers"
 import config from "../config"
 import TestContractHandler from "../keeper/TestContractHandler"
-import { metadataMock } from "../testdata/MetaData"
 
 use(spies)
 
 let ocean: Ocean
-let accounts: Account[]
-let testPublisher: Account
 
 describe("Ocean", () => {
 
-    const metadata = metadataMock
-
-    beforeEach(async () => {
-        spy.on(signatureHelpers, "signText", () => `0x${"a".repeat(130)}`)
-    })
-    afterEach(() => {
-        spy.restore()
-    })
-
     before(async () => {
         await TestContractHandler.prepareContracts()
         ocean = await Ocean.getInstance(config)
-        accounts = await ocean.accounts.list()
+    })
 
-        testPublisher = accounts[0]
+    beforeEach(async () => {
+        spy.on(ocean.utils.signature, "signText", () => `0x${"a".repeat(130)}`)
+    })
+    afterEach(() => {
+        spy.restore()
     })
 
     describe("#getInstance()", () => {
diff --git a/test/ocean/ServiceAgreement.test.ts b/test/ocean/ServiceAgreement.test.ts
deleted file mode 100644
index 1d06704..0000000
--- a/test/ocean/ServiceAgreement.test.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-import {assert} from "chai"
-import { DDO } from "../../src/ddo/DDO"
-import Account from "../../src/ocean/Account"
-import DID from "../../src/ocean/DID"
-import { Ocean } from "../../src/ocean/Ocean"
-import ServiceAgreement from "../../src/ocean/ServiceAgreements/ServiceAgreement"
-import { generateId } from "../../src/utils/GeneratorHelpers"
-import config from "../config"
-import TestContractHandler from "../keeper/TestContractHandler"
-
-const did: DID = DID.generate()
-
-describe("ServiceAgreement", () => {
-    let ocean: Ocean
-
-    let publisherAccount: Account
-    let consumerAccount: Account
-
-    before(async () => {
-        await TestContractHandler.prepareContracts()
-        ocean = await Ocean.getInstance(config)
-        const accounts = await ocean.accounts.list()
-
-        publisherAccount = accounts[1]
-        consumerAccount = accounts[2]
-    })
-
-    describe("#signServiceAgreement()", () => {
-        xit("should sign an service agreement", async () => {
-            // const ddo = new DDO({id: did.getDid(), service: [accessService]})
-            // const serviceAgreementId: string = generateId()
-
-            // const serviceAgreementSignature: string = await ServiceAgreement.signServiceAgreement(ddo, accessService.serviceDefinitionId,
-            //         serviceAgreementId, consumerAccount)
-
-            // assert(serviceAgreementSignature)
-            // assert(serviceAgreementSignature.startsWith("0x"))
-            // assert(serviceAgreementSignature.length === 132)
-        })
-    })
-})
diff --git a/test/utils/SignatureHelpers.test.ts b/test/ocean/utils/SignatureUtils.test.ts
similarity index 70%
rename from test/utils/SignatureHelpers.test.ts
rename to test/ocean/utils/SignatureUtils.test.ts
index 2aa7a48..8891ed3 100644
--- a/test/utils/SignatureHelpers.test.ts
+++ b/test/ocean/utils/SignatureUtils.test.ts
@@ -1,17 +1,24 @@
 import { assert, expect, spy, use } from "chai"
 import * as spies from "chai-spies"
 
-import Web3Provider from "../../src/keeper/Web3Provider"
-import { signText, verifyText } from "../../src/utils/SignatureHelpers"
+import config from "../../config"
+
+import { Ocean } from "../../../src/ocean/Ocean"
 
 use(spies)
 
-describe("SignatureHelpers", () => {
+describe("SignatureUtils", () => {
 
     const publicKey = `0x${"a".repeat(40)}`
     const text = "0123456789abcde"
     const signature = `0x${"a".repeat(130)}`
     let web3
+    let ocean: Ocean
+
+    before(async () => {
+        ocean = await Ocean.getInstance(config)
+        web3 = (ocean as any).web3
+    })
 
     afterEach(() => {
         spy.restore()
@@ -21,19 +28,18 @@ describe("SignatureHelpers", () => {
         let personalSignSpy
 
         beforeEach(() => {
-            web3 = Web3Provider.getWeb3()
             personalSignSpy = spy.on(web3.eth.personal, "sign", () => signature)
         })
 
         it("should sign a text as expected", async () => {
-            const signed = await signText(web3, text, publicKey)
+            const signed = await ocean.utils.signature.signText(text, publicKey)
 
             assert.equal(signed, signature)
             expect(personalSignSpy).to.have.been.called.with(text, publicKey)
         })
 
         it("should sign a text as expected using password", async () => {
-            const signed = await signText(web3, text, publicKey, "test")
+            const signed = await ocean.utils.signature.signText(text, publicKey, "test")
 
             assert.equal(signed, signature)
             expect(personalSignSpy).to.have.been.called.with(text, publicKey, "test")
@@ -44,7 +50,7 @@ describe("SignatureHelpers", () => {
         it("should recover the privateKey of a signed message", async () => {
             const personalRecoverSpy = spy.on(web3.eth.personal, "ecRecover", () => publicKey)
 
-            const verifiedPublicKey = await verifyText(web3, text, signature)
+            const verifiedPublicKey = await ocean.utils.signature.verifyText(text, signature)
 
             assert.equal(publicKey, verifiedPublicKey)
             expect(personalRecoverSpy).to.have.been.called.with(text, signature)