diff --git a/.travis.yml b/.travis.yml
index 2e5865241..c133a8639 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,9 +9,11 @@ node_js:
   - '10'
 env:
   - ETHBRIDGE=1
+  - ETHRELAY=1
   - NEARBRIDGE=1
   - NEARBRIDGE_LINT=1
   - NEARBRIDGE_COVERAGE=1
+  - NEARRELAY=1
 script:
   - if [ $ETHBRIDGE == "1" ]; then
       cd ./ethbridge;
@@ -21,6 +23,18 @@ script:
       rustup target add wasm32-unknown-unknown --toolchain stable;
       ./test.sh;
     fi
+  - if [ $ETHRELAY == "1" ]; then
+      cd ./ethbridge;
+      sh <(curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs) -y && export PATH=$PATH:~/.cargo/bin;
+      rustup toolchain install stable;
+      rustup default stable;
+      rustup target add wasm32-unknown-unknown --toolchain stable;
+      ./build.sh;
+      cd ../ethrelay/ethashproof;
+      ./build.sh;
+      cd ..;
+      yarn && yarn run test;
+    fi
   - if [ $NEARBRIDGE == "1" ]; then
       cd ./nearbridge;
       yarn;
@@ -37,3 +51,13 @@ script:
       yarn;
       yarn run coverage && cat coverage/lcov.info | coveralls;
     fi
+  - if [ $NEARRELAY == "1" ]; then
+      cd ./ethbridge;
+      sh <(curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs) -y && export PATH=$PATH:~/.cargo/bin;
+      rustup toolchain install stable;
+      rustup default stable;
+      rustup target add wasm32-unknown-unknown --toolchain stable;
+      ./build.sh;
+      cd ../nearrelay;
+      yarn && yarn run test;
+    fi
diff --git a/ethrelay/index.js b/ethrelay/index.js
index 49d291594..1a2fdae3b 100644
--- a/ethrelay/index.js
+++ b/ethrelay/index.js
@@ -37,15 +37,6 @@ function subscribeOnBlocksRangesFrom(web3, block_number, handler) {
     });
 }
 
-function arrayPrefixU32Length(array) {
-    return [
-        Math.trunc(array.length) % 256,
-        Math.trunc(array.length / 256) % 256,
-        Math.trunc(array.length / 256 / 256) % 256,
-        Math.trunc(array.length / 256 / 256 / 256) % 256,
-    ].concat(...array);
-}
-
 const hexToBuffer = (hex) => Buffer.from(Web3.utils.hexToBytes(hex));
 const readerToHex = (len) => (reader) => Web3.utils.bytesToHex(reader.read_fixed_array(len));
 
@@ -341,16 +332,15 @@ class EthBridgeContract extends Contract {
 
 (async function () {
 
-    const web3 = new Web3("wss://mainnet.infura.io/ws/v3/b5f870422ee5454fb11937e947154cd2");
+    const web3 = new Web3(process.env.ETHEREUM_NODE_URL);
     const near = await nearlib.connect({
-        nodeUrl: 'http://localhost:3030', //'https://rpc.nearprotocol.com',
-        networkId: 'local', // TODO: detect automatically
+        nodeUrl: process.env.NEAR_NODE_URL, // 'https://rpc.nearprotocol.com',
+        networkId: process.env.NEAR_NODE_NETWORK_ID, // TODO: detect automatically
         deps: {
             keyStore: new nearlib.keyStores.UnencryptedFileSystemKeyStore(__dirname + '/neardev')
         }
     });
 
-
     const account = new nearlib.Account(near.connection, 'ethbridge');
 
     const ethBridgeContract = new EthBridgeContract(account, 'ethbridge');
diff --git a/ethrelay/package.json b/ethrelay/package.json
index c55e35aee..a0e9a4d6f 100644
--- a/ethrelay/package.json
+++ b/ethrelay/package.json
@@ -4,13 +4,15 @@
   "description": "Ethereum >> Near relay",
   "main": "index.js",
   "scripts": {
-    "start": "scripts/start.sh"
+    "test": "scripts/run_localnet.sh",
+    "start": "scripts/run_testnet.sh"
   },
   "author": "",
   "license": "MIT",
   "dependencies": {
     "near-shell": "^0.20.1",
     "nearlib": "^0.21.0",
+    "ganache-cli": "^6.9.0",
     "web3": "^1.2.4"
   }
 }
diff --git a/ethrelay/scripts/run_localnet.sh b/ethrelay/scripts/run_localnet.sh
new file mode 100755
index 000000000..0409709b3
--- /dev/null
+++ b/ethrelay/scripts/run_localnet.sh
@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+# Exit script as soon as a command fails.
+set -o errexit
+
+# Executes cleanup function at script exit.
+trap cleanup EXIT
+
+waitport() {
+    while ! nc -z localhost $1 ; do sleep 1 ; done
+}
+
+cleanup() {
+    # Kill the nearnode instance that we started (if we started one and if it's still running).
+    if [ -n "$node_started" ]; then
+        docker kill nearcore watchtower > /dev/null &
+    fi
+    
+    # Kill the ganache instance that we started (if we started one and if it's still running).
+    if [ -n "$ganache_pid" ] && ps -p $ganache_pid > /dev/null; then
+        kill $ganache_pid
+    fi
+}
+
+nearnode_port=24567
+
+nearnode_running() {
+    nc -z localhost "$nearnode_port"
+}
+
+start_nearnode() {
+    echo "ethrelay" | "$DIR/start_localnet.py" --home "$DIR/.near" --image "nearprotocol/nearcore:ethdenver"
+    waitport $nearnode_port
+}
+
+if nearnode_running; then
+    echo "Using existing nearnode instance"
+else
+    echo "Starting our own nearnode instance"
+    rm -rf "$DIR/.near"
+    start_nearnode
+    node_started=1
+fi
+
+ganache_port=9545
+
+ganache_running() {
+    nc -z localhost "$ganache_port"
+}
+
+start_ganache() {
+    local accounts=(
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501200,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501201,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501202,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501203,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501204,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501205,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501206,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501207,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501208,1000000000000000000000000"
+        --account="0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501209,1000000000000000000000000"
+    )
+
+    yarn run ganache-cli --blockTime 12 --gasLimit 10000000 -p "$ganache_port" "${accounts[@]}" > /dev/null &
+    ganache_pid=$!
+    waitport $ganache_port
+}
+
+if ganache_running; then
+    echo "Using existing ganache instance"
+else
+    echo "Starting our own ganache instance"
+    start_ganache
+fi
+
+NODE_URL="http://localhost:3030"
+
+echo "Creating account for smart contract:"
+NODE_ENV=local yarn run near --nodeUrl=$NODE_URL --homeDir "$DIR/.near" --keyPath "$DIR/.near/validator_key.json" create_account ethbridge --masterAccount=ethrelay --initialBalance 100000000 || echo "Skip creating ethbridge accout"
+echo "Deploying smart contract:"
+NODE_ENV=local yarn run near --nodeUrl=$NODE_URL --homeDir "$DIR/.near" --keyPath "$DIR/.near/validator_key.json" deploy --contractName ethbridge --wasmFile "$DIR/../../ethbridge/res/eth_bridge.wasm" || echo "Skip deploying ethbridge smart contract"
+
+NEAR_NODE_URL="http://localhost:3030" \
+    NEAR_NODE_NETWORK_ID=local \
+    ETHEREUM_NODE_URL="ws://localhost:$ganache_port" \
+    node "$DIR/../index.js"
diff --git a/ethrelay/scripts/run_testnet.sh b/ethrelay/scripts/run_testnet.sh
new file mode 100755
index 000000000..1fbeaa753
--- /dev/null
+++ b/ethrelay/scripts/run_testnet.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+# Exit script as soon as a command fails.
+set -o errexit
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+NODE_URL="https://rpc.nearprotocol.com"
+
+echo "Creating account for smart contract:"
+NODE_ENV=local yarn run near --nodeUrl=$NODE_URL --homeDir "$DIR/.near" --keyPath "$DIR/.near/validator_key.json" create_account ethbridge --masterAccount=ethrelay --initialBalance 100000000 || echo "Skip creating ethbridge accout"
+echo "Deploying smart contract:"
+NODE_ENV=local yarn run near --nodeUrl=$NODE_URL --homeDir "$DIR/.near" --keyPath "$DIR/.near/validator_key.json" deploy --contractName ethbridge --wasmFile "$DIR/../../ethbridge/res/eth_bridge.wasm" || echo "Skip deploying ethbridge smart contract"
+
+# Successfully stop after 5m
+{ sleep 5m && kill -l 0 $$ && echo "Successfully worked for 5m, stopped" } &
+
+# Launch EthRelay
+NEAR_NODE_URL="https://rpc.nearprotocol.com" \
+    NEAR_NODE_NETWORK_ID=local \
+    ETHEREUM_NODE_URL="wss://ropsten.infura.io/ws/v3/b5f870422ee5454fb11937e947154cd2" \
+    node "$DIR/../index.js"
diff --git a/ethrelay/scripts/start.sh b/ethrelay/scripts/start.sh
deleted file mode 100755
index 23e5965eb..000000000
--- a/ethrelay/scripts/start.sh
+++ /dev/null
@@ -1,45 +0,0 @@
-#!/usr/bin/env bash
-
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Exit script as soon as a command fails.
-set -o errexit
-
-# Executes cleanup function at script exit.
-trap cleanup EXIT
-
-cleanup() {
-    # Kill the nearnode instance that we started (if we started one and if it's still running).
-    if [ -n "$node_started" ]; then
-        docker kill nearcore watchtower > /dev/null &
-    fi
-}
-
-nearnode_port=24567
-
-nearnode_running() {
-    nc -z localhost "$nearnode_port"
-}
-
-start_nearnode() {
-    echo "ethrelay" | "$DIR/start_localnet.py" --home "$DIR/.near" --image "nearprotocol/nearcore:ethdenver"
-    sleep 10
-}
-
-if nearnode_running; then
-    echo "Using existing nearnode instance"
-else
-    echo "Starting our own nearnode instance"
-    rm -rf "$DIR/.near"
-    start_nearnode
-    node_started=1
-fi
-
-NODE_URL="http://localhost:3030"
-
-echo "Creating account for smart contract:"
-NODE_ENV=local yarn run near --nodeUrl=$NODE_URL --homeDir "$DIR/.near" --keyPath "$DIR/.near/validator_key.json" create_account ethbridge --masterAccount=ethrelay --initialBalance 100000000 || echo "Skip creating ethbridge accout"
-echo "Deploying smart contract:"
-NODE_ENV=local yarn run near --nodeUrl=$NODE_URL --homeDir "$DIR/.near" --keyPath "$DIR/.near/validator_key.json" deploy --contractName ethbridge --wasmFile "$DIR/../../ethbridge/res/eth_bridge.wasm" || echo "Skip deploying ethbridge smart contract"
-
-node "$DIR/../index.js"
diff --git a/ethrelay/yarn.lock b/ethrelay/yarn.lock
index 5af8bb23b..0c0875ccc 100644
--- a/ethrelay/yarn.lock
+++ b/ethrelay/yarn.lock
@@ -346,7 +346,7 @@ ansi-regex@^5.0.0:
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-5.0.0.tgz#388539f55179bf39339c81af30a654d69f87cb75"
   integrity sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==
 
-ansi-styles@^3.2.1:
+ansi-styles@^3.2.0, ansi-styles@^3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.1.tgz#41fbb20243e50b12be0f04b8dedbf07520ce841d"
   integrity sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==
@@ -710,6 +710,11 @@ buffer-fill@^1.0.0:
   resolved "https://registry.yarnpkg.com/buffer-fill/-/buffer-fill-1.0.0.tgz#f8f78b76789888ef39f205cd637f68e702122b2c"
   integrity sha1-+PeLdniYiO858gXNY39o5wISKyw=
 
+buffer-from@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
+  integrity sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==
+
 buffer-to-arraybuffer@^0.0.5:
   version "0.0.5"
   resolved "https://registry.yarnpkg.com/buffer-to-arraybuffer/-/buffer-to-arraybuffer-0.0.5.tgz#6064a40fa76eb43c723aba9ef8f6e1216d10511a"
@@ -838,6 +843,15 @@ cli-boxes@^2.2.0:
   resolved "https://registry.yarnpkg.com/cli-boxes/-/cli-boxes-2.2.0.tgz#538ecae8f9c6ca508e3c3c95b453fe93cb4c168d"
   integrity sha512-gpaBrMAizVEANOpfZp/EEUixTXDyGt7DFzdK5hU+UbWt/J0lB0w20ncZj59Z9a93xHb9u12zF5BS6i9RKbtg4w==
 
+cliui@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/cliui/-/cliui-5.0.0.tgz#deefcfdb2e800784aa34f46fa08e06851c7bbbc5"
+  integrity sha512-PYeGSEmmHM6zvoef2w8TPzlrnNpXIjTipYK780YswmIP9vjxmd6Y2a3CB2Ks6/AU8NHjZugXvo8w3oWM2qnwXA==
+  dependencies:
+    string-width "^3.1.0"
+    strip-ansi "^5.2.0"
+    wrap-ansi "^5.1.0"
+
 cliui@^6.0.0:
   version "6.0.0"
   resolved "https://registry.yarnpkg.com/cliui/-/cliui-6.0.0.tgz#511d702c0c4e41ca156d7d0e96021f23e13225b1"
@@ -1429,6 +1443,19 @@ ethereumjs-tx@^2.1.1:
     ethereumjs-common "^1.3.1"
     ethereumjs-util "^6.0.0"
 
+ethereumjs-util@6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-6.1.0.tgz#e9c51e5549e8ebd757a339cc00f5380507e799c8"
+  integrity sha512-URESKMFbDeJxnAxPppnk2fN6Y3BIatn9fwn76Lm8bQlt+s52TpG8dN9M66MLPuRAiAOIqL3dfwqWJf0sd0fL0Q==
+  dependencies:
+    bn.js "^4.11.0"
+    create-hash "^1.1.2"
+    ethjs-util "0.1.6"
+    keccak "^1.0.2"
+    rlp "^2.0.0"
+    safe-buffer "^5.1.1"
+    secp256k1 "^3.0.1"
+
 ethereumjs-util@^6.0.0:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-6.2.0.tgz#23ec79b2488a7d041242f01e25f24e5ad0357960"
@@ -1767,6 +1794,15 @@ function-bind@^1.1.1:
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
   integrity sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==
 
+ganache-cli@^6.9.0:
+  version "6.9.1"
+  resolved "https://registry.yarnpkg.com/ganache-cli/-/ganache-cli-6.9.1.tgz#1e13eee098fb9f19b031a191ec3f62ae926ea8b3"
+  integrity sha512-VPBumkNUZzXDRQwVOby5YyQpd5t1clkr06xMgB28lZdEIn5ht1GMwUskOTFOAxdkQ4J12IWP0gdeacVRGowqbA==
+  dependencies:
+    ethereumjs-util "6.1.0"
+    source-map-support "0.5.12"
+    yargs "13.2.4"
+
 gensync@^1.0.0-beta.1:
   version "1.0.0-beta.1"
   resolved "https://registry.yarnpkg.com/gensync/-/gensync-1.0.0-beta.1.tgz#58f4361ff987e5ff6e1e7a210827aa371eaac269"
@@ -2123,6 +2159,11 @@ invariant@^2.2.4:
   dependencies:
     loose-envify "^1.0.0"
 
+invert-kv@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/invert-kv/-/invert-kv-2.0.0.tgz#7393f5afa59ec9ff5f67a27620d11c226e3eec02"
+  integrity sha512-wPVv/y/QQ/Uiirj/vh3oP+1Ww+AWehmi1g5fFWGPF6IpCBCDVrhgHRMvrLfdYcwDh3QJbGXDW4JAuzxElLSqKA==
+
 ipaddr.js@1.9.0:
   version "1.9.0"
   resolved "https://registry.yarnpkg.com/ipaddr.js/-/ipaddr.js-1.9.0.tgz#37df74e430a0e47550fe54a2defe30d8acd95f65"
@@ -2543,6 +2584,16 @@ jsprim@^1.2.2:
     json-schema "0.2.3"
     verror "1.10.0"
 
+keccak@^1.0.2:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/keccak/-/keccak-1.4.0.tgz#572f8a6dbee8e7b3aa421550f9e6408ca2186f80"
+  integrity sha512-eZVaCpblK5formjPjeTBik7TAg+pqnDrMHIffSvi9Lh7PQgM1+hSzakUeZFCk9DVVG0dacZJuaz2ntwlzZUIBw==
+  dependencies:
+    bindings "^1.2.1"
+    inherits "^2.0.3"
+    nan "^2.2.1"
+    safe-buffer "^5.1.0"
+
 keccak@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/keccak/-/keccak-2.0.0.tgz#7456ea5023284271e6f362b4397e8df4d2bb994c"
@@ -2591,6 +2642,13 @@ latest-version@^5.0.0:
   dependencies:
     package-json "^6.3.0"
 
+lcid@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/lcid/-/lcid-2.0.0.tgz#6ef5d2df60e52f82eb228a4c373e8d1f397253cf"
+  integrity sha512-avPEb8P8EGnwXKClwsNUgryVjllcRqtMYa49NTsbQagYuT1DcXnl1915oxWjoyGrXR6zH/Y0Zc96xWsPcoDKeA==
+  dependencies:
+    invert-kv "^2.0.0"
+
 load-json-file@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-4.0.0.tgz#2f5f45ab91e33216234fd53adab668eb4ec0993b"
@@ -2664,6 +2722,13 @@ makeerror@1.0.x:
   dependencies:
     tmpl "1.0.x"
 
+map-age-cleaner@^0.1.1:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/map-age-cleaner/-/map-age-cleaner-0.1.3.tgz#7d583a7306434c055fe474b0f45078e6e1b4b92a"
+  integrity sha512-bJzx6nMoP6PDLPBFmg7+xRKeFZvFboMrGlxmNj9ClvX53KrmvM5bXFXEWjbz4cz1AFn+jWJ9z/DJSz7hrs0w3w==
+  dependencies:
+    p-defer "^1.0.0"
+
 map-cache@^0.2.2:
   version "0.2.2"
   resolved "https://registry.yarnpkg.com/map-cache/-/map-cache-0.2.2.tgz#c32abd0bd6525d9b051645bb4f26ac5dc98a0dbf"
@@ -2690,6 +2755,15 @@ media-typer@0.3.0:
   resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"
   integrity sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g=
 
+mem@^4.0.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/mem/-/mem-4.3.0.tgz#461af497bc4ae09608cdb2e60eefb69bff744178"
+  integrity sha512-qX2bG48pTqYRVmDB37rn/6PT7LcR8T7oAX3bf99u1Tt1nzxYfxkgqDwUwolPlXweM0XzBOBFzSx4kfp7KP1s/w==
+  dependencies:
+    map-age-cleaner "^0.1.1"
+    mimic-fn "^2.0.0"
+    p-is-promise "^2.0.0"
+
 merge-descriptors@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/merge-descriptors/-/merge-descriptors-1.0.1.tgz#b00aaa556dd8b44568150ec9d1b953f3f90cbb61"
@@ -2749,6 +2823,11 @@ mime@1.6.0:
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
   integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
 
+mimic-fn@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
+  integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
+
 mimic-response@^1.0.0, mimic-response@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/mimic-response/-/mimic-response-1.0.1.tgz#4923538878eef42063cb8a3e3b0798781487ab1b"
@@ -3094,6 +3173,15 @@ once@^1.3.0, once@^1.3.1, once@^1.4.0:
   dependencies:
     wrappy "1"
 
+os-locale@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/os-locale/-/os-locale-3.1.0.tgz#a802a6ee17f24c10483ab9935719cef4ed16bf1a"
+  integrity sha512-Z8l3R4wYWM40/52Z+S265okfFj8Kt2cC2MKY+xNi3kFs+XGI7WXu/I309QQQYbRW4ijiZ+yxs9pqEhJh0DqW3Q==
+  dependencies:
+    execa "^1.0.0"
+    lcid "^2.0.0"
+    mem "^4.0.0"
+
 p-cancelable@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/p-cancelable/-/p-cancelable-0.3.0.tgz#b9e123800bcebb7ac13a479be195b507b98d30fa"
@@ -3104,11 +3192,21 @@ p-cancelable@^1.0.0:
   resolved "https://registry.yarnpkg.com/p-cancelable/-/p-cancelable-1.1.0.tgz#d078d15a3af409220c886f1d9a0ca2e441ab26cc"
   integrity sha512-s73XxOZ4zpt1edZYZzvhqFa6uvQc1vwUa0K0BdtIZgQMAJj9IbebH+JkgKZc9h+B05PKHLOTl4ajG1BmNrVZlw==
 
+p-defer@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-defer/-/p-defer-1.0.0.tgz#9f6eb182f6c9aa8cd743004a7d4f96b196b0fb0c"
+  integrity sha1-n26xgvbJqozXQwBKfU+WsZaw+ww=
+
 p-finally@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
   integrity sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4=
 
+p-is-promise@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/p-is-promise/-/p-is-promise-2.1.0.tgz#918cebaea248a62cf7ffab8e3bca8c5f882fc42e"
+  integrity sha512-Y3W0wlRPK8ZMRbNq97l4M5otioeA5lm1z7bkNkxCka8HSPjR0xRWmpCmc9utiaLP9Jb1eD8BgeIxTW4AIF45Pg==
+
 p-limit@^2.0.0, p-limit@^2.2.0:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-2.2.2.tgz#61279b67721f5287aa1c13a9a7fbbc48c9291b1e"
@@ -3561,7 +3659,7 @@ ripemd160@^2.0.0, ripemd160@^2.0.1:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
-rlp@^2.2.3:
+rlp@^2.0.0, rlp@^2.2.3:
   version "2.2.4"
   resolved "https://registry.yarnpkg.com/rlp/-/rlp-2.2.4.tgz#d6b0e1659e9285fc509a5d169a9bd06f704951c1"
   integrity sha512-fdq2yYCWpAQBhwkZv+Z8o/Z4sPmYm1CUq6P7n6lVTOdb949CnqA0sndXal5C1NleSVSZm6q5F3iEbauyVln/iw==
@@ -3813,6 +3911,14 @@ source-map-resolve@^0.5.0:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
+source-map-support@0.5.12:
+  version "0.5.12"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.12.tgz#b4f3b10d51857a5af0138d3ce8003b201613d599"
+  integrity sha512-4h2Pbvyy15EE02G+JOZpUCmqWJuqrs+sEkzewTm++BPi7Hvn/HwcqLAcNxYAyI0x13CpPPn+kMjl+hplXMHITQ==
+  dependencies:
+    buffer-from "^1.0.0"
+    source-map "^0.6.0"
+
 source-map-url@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
@@ -3899,7 +4005,7 @@ strict-uri-encode@^1.0.0:
   resolved "https://registry.yarnpkg.com/strict-uri-encode/-/strict-uri-encode-1.1.0.tgz#279b225df1d582b1f54e65addd4352e18faa0713"
   integrity sha1-J5siXfHVgrH1TmWt3UNS4Y+qBxM=
 
-string-width@^3.0.0:
+string-width@^3.0.0, string-width@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-3.1.0.tgz#22767be21b62af1081574306f69ac51b62203961"
   integrity sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==
@@ -3940,7 +4046,7 @@ string_decoder@~1.1.1:
   dependencies:
     safe-buffer "~5.1.0"
 
-strip-ansi@^5.1.0:
+strip-ansi@^5.0.0, strip-ansi@^5.1.0, strip-ansi@^5.2.0:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-5.2.0.tgz#8c9a536feb6afc962bdfa5b104a5091c1ad9c0ae"
   integrity sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==
@@ -4634,6 +4740,15 @@ widest-line@^3.1.0:
   dependencies:
     string-width "^4.0.0"
 
+wrap-ansi@^5.1.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-5.1.0.tgz#1fd1f67235d5b6d0fee781056001bfb694c03b09"
+  integrity sha512-QC1/iN/2/RPVJ5jYK8BGttj5z83LmSKmvbvrXPNCLZSEb32KKVDJDl/MOt2N01qU2H/FkzEa9PKto1BqDjtd7Q==
+  dependencies:
+    ansi-styles "^3.2.0"
+    string-width "^3.0.0"
+    strip-ansi "^5.0.0"
+
 wrap-ansi@^6.2.0:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-6.2.0.tgz#e9393ba07102e6c91a3b221478f0257cd2856e53"
@@ -4743,6 +4858,14 @@ yallist@^3.0.0, yallist@^3.0.3:
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.1.1.tgz#dbb7daf9bfd8bac9ab45ebf602b8cbad0d5d08fd"
   integrity sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==
 
+yargs-parser@^13.1.0:
+  version "13.1.1"
+  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-13.1.1.tgz#d26058532aa06d365fe091f6a1fc06b2f7e5eca0"
+  integrity sha512-oVAVsHz6uFrg3XQheFII8ESO2ssAf9luWuAd6Wexsu4F3OtIW0o8IribPXYrD4WC24LWtPrJlGy87y5udK+dxQ==
+  dependencies:
+    camelcase "^5.0.0"
+    decamelize "^1.2.0"
+
 yargs-parser@^16.1.0:
   version "16.1.0"
   resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-16.1.0.tgz#73747d53ae187e7b8dbe333f95714c76ea00ecf1"
@@ -4751,6 +4874,23 @@ yargs-parser@^16.1.0:
     camelcase "^5.0.0"
     decamelize "^1.2.0"
 
+yargs@13.2.4:
+  version "13.2.4"
+  resolved "https://registry.yarnpkg.com/yargs/-/yargs-13.2.4.tgz#0b562b794016eb9651b98bd37acf364aa5d6dc83"
+  integrity sha512-HG/DWAJa1PAnHT9JAhNa8AbAv3FPaiLzioSjCcmuXXhP8MlpHO5vwls4g4j6n30Z74GVQj8Xa62dWVx1QCGklg==
+  dependencies:
+    cliui "^5.0.0"
+    find-up "^3.0.0"
+    get-caller-file "^2.0.1"
+    os-locale "^3.1.0"
+    require-directory "^2.1.1"
+    require-main-filename "^2.0.0"
+    set-blocking "^2.0.0"
+    string-width "^3.0.0"
+    which-module "^2.0.0"
+    y18n "^4.0.0"
+    yargs-parser "^13.1.0"
+
 yargs@^15.0.1:
   version "15.1.0"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-15.1.0.tgz#e111381f5830e863a89550bd4b136bb6a5f37219"
diff --git a/nearrelay/index.js b/nearrelay/index.js
index d3b7e4562..211143a82 100644
--- a/nearrelay/index.js
+++ b/nearrelay/index.js
@@ -33,8 +33,8 @@ function subscribeOnBlocksRangesFrom(web3, block_number, handler) {
 
     const web3 = new Web3("http://localhost:9545");
     const near = await nearlib.connect({
-        nodeUrl: 'http://localhost:3030', //'https://rpc.nearprotocol.com',
-        networkId: 'local', // TODO: detect automatically
+        nodeUrl: process.env.NEAR_NODE_URL, //'https://rpc.nearprotocol.com',
+        networkId: process.env.NEAR_NODE_NETWORK_ID, // TODO: detect automatically
         deps: {
             keyStore: new nearlib.keyStores.UnencryptedFileSystemKeyStore(__dirname + '/neardev')
         }
diff --git a/nearrelay/package.json b/nearrelay/package.json
index 9eabc1d9d..73e980471 100644
--- a/nearrelay/package.json
+++ b/nearrelay/package.json
@@ -4,7 +4,8 @@
   "description": "Ethereum >> Near relay",
   "main": "index.js",
   "scripts": {
-    "start": "scripts/start.sh"
+    "test": "scripts/run_localnet.sh",
+    "start": "scripts/run_testnet.sh"
   },
   "author": "",
   "license": "MIT",
diff --git a/nearrelay/scripts/prepare.sh b/nearrelay/scripts/prepare.sh
index 93fcb79c2..839b7f278 100755
--- a/nearrelay/scripts/prepare.sh
+++ b/nearrelay/scripts/prepare.sh
@@ -3,4 +3,4 @@
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
 rm -rf "$DIR/.near"
-cargo run --package near --bin near -- --home "$DIR/.near" init --chain-id= --test-seed=ethrelay --account-id=ethrelay --fast
+cargo run --package near --bin near -- --home "$DIR/.near" init --chain-id= --test-seed=nearrelay --account-id=nearrelay --fast
diff --git a/nearrelay/scripts/start.sh b/nearrelay/scripts/run_localnet.sh
similarity index 93%
rename from nearrelay/scripts/start.sh
rename to nearrelay/scripts/run_localnet.sh
index 9689ef2f0..58d2912e4 100755
--- a/nearrelay/scripts/start.sh
+++ b/nearrelay/scripts/run_localnet.sh
@@ -76,4 +76,8 @@ else
     start_ganache
 fi
 
-NEAR_BRIDGE_OWNER_PRIVATE_KEY=0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501200 node "$DIR/../index.js"
+NEAR_BRIDGE_OWNER_PRIVATE_KEY=0x2bdd21761a483f71054e14f5b827213567971c676928d9a1808cbfa4b7501200 \
+    NEAR_NODE_URL="http://localhost:3030" \
+    NEAR_NODE_NETWORK_ID=local \
+    ETHEREUM_NODE_URL="http://localhost:9545" \
+    node "$DIR/../index.js"
diff --git a/nearrelay/scripts/run_testnet.sh b/nearrelay/scripts/run_testnet.sh
new file mode 100755
index 000000000..02447a5d5
--- /dev/null
+++ b/nearrelay/scripts/run_testnet.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+# Exit script as soon as a command fails.
+set -o errexit
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+NODE_URL="https://rpc.nearprotocol.com"
+
+echo "Creating account for smart contract:"
+NODE_ENV=local yarn run near --nodeUrl=$NODE_URL --homeDir "$DIR/.near" --keyPath "$DIR/.near/validator_key.json" create_account ethbridge --masterAccount=nearrelay --initialBalance 100000000 || echo "Skip creating ethbridge accout"
+echo "Deploying smart contract:"
+NODE_ENV=local yarn run near --nodeUrl=$NODE_URL --homeDir "$DIR/.near" --keyPath "$DIR/.near/validator_key.json" deploy --contractName ethbridge --wasmFile "$DIR/../../ethbridge/res/eth_bridge.wasm" || echo "Skip deploying ethbridge smart contract"
+
+# Successfully stop after 5m
+{ sleep 5m && kill -l 0 $$ && echo "Successfully worked for 5m, stopped" } &
+
+# Launch NearRelay
+NEAR_NODE_URL="https://rpc.nearprotocol.com" \
+    NEAR_NODE_NETWORK_ID=local \
+    ETHEREUM_NODE_URL="wss://ropsten.infura.io/ws/v3/b5f870422ee5454fb11937e947154cd2" \
+    node "$DIR/../index.js"