diff --git a/proxy/deploy-test.sh b/proxy/deploy-test.sh
index 4d6e29732..a0df058f2 100755
--- a/proxy/deploy-test.sh
+++ b/proxy/deploy-test.sh
@@ -3,8 +3,10 @@ set -xeuo pipefail
 
 echo "Deploy test..."
 
+solana config set -u $SOLANA_URL
 solana address || solana-keygen new --no-passphrase
-export $(/spl/bin/neon-cli --evm_loader JxujFZpNBPADbfw2MnPPgnnFGruzp2ELSFWPQgrjz5D neon-elf-params /spl/bin/evm_loader.so | grep NEON_REVISION | xargs)
+solana program dump "$EVM_LOADER" ./evm_loader.dump
+export $(/spl/bin/neon-cli --evm_loader "$EVM_LOADER" neon-elf-params ./evm_loader.dump)
 
 curl -v --header "Content-Type: application/json" --data '{"method":"eth_blockNumber","id":1,"jsonrpc":"2.0","params":[]}' $PROXY_URL
 
diff --git a/proxy/plugin/solana_rest_api.py b/proxy/plugin/solana_rest_api.py
index 5bd1d0b13..1d85409b0 100644
--- a/proxy/plugin/solana_rest_api.py
+++ b/proxy/plugin/solana_rest_api.py
@@ -42,7 +42,6 @@
 modelInstanceLock = threading.Lock()
 modelInstance = None
 
-chainId = os.environ.get("NEON_CHAIN_ID", "0x6e")    # default value 110
 EXTRA_GAS = int(os.environ.get("EXTRA_GAS", "0"))
 
 class PermanentAccounts:
@@ -107,10 +106,14 @@ def web3_clientVersion(self):
         return self.neon_config_dict['web3_clientVersion']
 
     def eth_chainId(self):
-        return chainId
+        neon_config_load(self)
+        # NEON_CHAIN_ID is a string in decimal form
+        return hex(int(self.neon_config_dict['NEON_CHAIN_ID']))
 
     def net_version(self):
-        return str(int(chainId,base=16))
+        neon_config_load(self)
+        # NEON_CHAIN_ID is a string in decimal form
+        return self.neon_config_dict['NEON_CHAIN_ID']
 
     def eth_gasPrice(self):
         return hex(MINIMAL_GAS_PRICE)
diff --git a/proxy/plugin/solana_rest_api_tools.py b/proxy/plugin/solana_rest_api_tools.py
index 647df4231..c861e15e9 100644
--- a/proxy/plugin/solana_rest_api_tools.py
+++ b/proxy/plugin/solana_rest_api_tools.py
@@ -318,6 +318,20 @@ def ether2seed(ether, program_id, base):
     logger.debug('ether2program: {} {} => {} (seed {})'.format(ether, 255, acc, seed))
     return (acc, 255, seed)
 
+def read_elf_params(out_dict):
+    logger.debug('load for solana_url={} and evm_loader_id={}'.format(solana_url, evm_loader_id))
+    res = solana_cli().call('program', 'dump', evm_loader_id, './evm_loader.dump')
+    substr = "Wrote program to "
+    path = ""
+    for line in res.splitlines():
+        if line.startswith(substr):
+            path = line[len(substr):].strip()
+    if path == "":
+        raise Exception("cannot program dump for ", evm_loader_id)
+    for param in neon_cli().call("neon-elf-params", path).splitlines():
+        if param.startswith('NEON_') and '=' in param:
+            v = param.split('=')
+            out_dict[v[0]] = v[1]
 
 def neon_config_load(ethereum_model):
     try:
@@ -331,19 +345,7 @@ def neon_config_load(ethereum_model):
         if elapsed_time < TIMEOUT_TO_RELOAD_NEON_CONFIG:
             return
 
-    logger.debug('load for solana_url={} and evm_loader_id={}'.format(solana_url, evm_loader_id))
-    res = solana_cli().call('program', 'dump', evm_loader_id, './evm_loader.dump')
-    substr = "Wrote program to "
-    path = ""
-    for line in res.splitlines():
-        if line.startswith(substr):
-            path = line[len(substr):].strip()
-    if path == "":
-        raise Exception("cannot program dump for ", evm_loader_id)
-    for param in neon_cli().call("neon-elf-params", path).splitlines():
-        if param.startswith('NEON_') and '=' in param:
-            v = param.split('=')
-            ethereum_model.neon_config_dict[v[0]] = v[1]
+    read_elf_params(ethereum_model.neon_config_dict)
     ethereum_model.neon_config_dict['load_time'] = datetime.now().timestamp()
     # 'Neon/v0.3.0-rc0-d1e4ff618457ea9cbc82b38d2d927e8a62168bec
     ethereum_model.neon_config_dict['web3_clientVersion'] = 'Neon/v' + \
diff --git a/proxy/run-proxy.sh b/proxy/run-proxy.sh
index f1723d498..f356cd3ee 100755
--- a/proxy/run-proxy.sh
+++ b/proxy/run-proxy.sh
@@ -10,7 +10,6 @@ if [ "$CONFIG" == "ci" ]; then
   [[ -z "$ETH_TOKEN_MINT"               ]] && export ETH_TOKEN_MINT=deploy
   [[ -z "$COLLATERAL_POOL_BASE"         ]] && export COLLATERAL_POOL_BASE=deploy
   [[ -z "$NEW_USER_AIRDROP_AMOUNT"      ]] && export NEW_USER_AIRDROP_AMOUNT=100
-  [[ -z "$NEON_CHAIN_ID"                ]] && export NEON_CHAIN_ID=0x6f
   [[ -z "$EXTRA_GAS"                    ]] && export EXTRA_GAS=100000
   [[ -z "$NEON_CLI_TIMEOUT"             ]] && export NEON_CLI_TIMEOUT="0.5"
   [[ -z "$USE_COMBINED_START_CONTINUE"  ]] && export USE_COMBINED_START_CONTINUE="YES"
@@ -22,7 +21,6 @@ elif [ "$CONFIG" == "local" ]; then
   [[ -z "$ETH_TOKEN_MINT"               ]] && export ETH_TOKEN_MINT=deploy
   [[ -z "$COLLATERAL_POOL_BASE"         ]] && export COLLATERAL_POOL_BASE=deploy
   [[ -z "$NEW_USER_AIRDROP_AMOUNT"      ]] && export NEW_USER_AIRDROP_AMOUNT=10
-  [[ -z "$NEON_CHAIN_ID"                ]] && export NEON_CHAIN_ID=0x6f
   [[ -z "$EXTRA_GAS"                    ]] && export EXTRA_GAS=0
   [[ -z "$NEON_CLI_TIMEOUT"             ]] && export NEON_CLI_TIMEOUT="0.9"
   [[ -z "$MINIMAL_GAS_PRICE"            ]] && export MINIMAL_GAS_PRICE=0
@@ -32,7 +30,6 @@ elif [ "$CONFIG" == "devnet" ]; then
   [[ -z "$ETH_TOKEN_MINT"               ]] && export ETH_TOKEN_MINT=89dre8rZjLNft7HoupGiyxu3MNftR577ZYu8bHe2kK7g
   [[ -z "$COLLATERAL_POOL_BASE"         ]] && export COLLATERAL_POOL_BASE=7SBdHNeF9FFYySEoszpjZXXQsAiwa5Lzpsz6nUJWusEx
   [[ -z "$NEW_USER_AIRDROP_AMOUNT"      ]] && export NEW_USER_AIRDROP_AMOUNT=0
-  [[ -z "$NEON_CHAIN_ID"                ]] && export NEON_CHAIN_ID=0x6e
   [[ -z "$EXTRA_GAS"                    ]] && export EXTRA_GAS=90000
   [[ -z "$NEON_CLI_TIMEOUT"             ]] && export NEON_CLI_TIMEOUT="10"
   [[ -z "$MINIMAL_GAS_PRICE"            ]] && export MINIMAL_GAS_PRICE=1
@@ -42,7 +39,6 @@ elif [ "$CONFIG" == "testnet" ]; then
   [[ -z "$ETH_TOKEN_MINT"               ]] && export ETH_TOKEN_MINT=89dre8rZjLNft7HoupGiyxu3MNftR577ZYu8bHe2kK7g
   [[ -z "$COLLATERAL_POOL_BASE"         ]] && export COLLATERAL_POOL_BASE=7SBdHNeF9FFYySEoszpjZXXQsAiwa5Lzpsz6nUJWusEx
   [[ -z "$NEW_USER_AIRDROP_AMOUNT"      ]] && export NEW_USER_AIRDROP_AMOUNT=0
-  [[ -z "$NEON_CHAIN_ID"                ]] && export NEON_CHAIN_ID=0x6f
   [[ -z "$EXTRA_GAS"                    ]] && export EXTRA_GAS=90000
   [[ -z "$NEON_CLI_TIMEOUT"             ]] && export NEON_CLI_TIMEOUT="15"
   [[ -z "$MINIMAL_GAS_PRICE"            ]] && export MINIMAL_GAS_PRICE="1"
@@ -54,7 +50,6 @@ fi
 [[ -z "$EVM_LOADER"               ]] && echo "EVM_LOADER is not set" && exit 1
 [[ -z "$ETH_TOKEN_MINT"           ]] && echo "ETH_TOKEN_MINT is not set" && exit 1
 [[ -z "$COLLATERAL_POOL_BASE"     ]] && echo "COLLATERAL_POOL_BASE is not set" && exit 1
-[[ -z "$NEON_CHAIN_ID"            ]] && echo "NEON_CHAIN_ID is not set" && exit 1
 
 echo SOLANA_URL=$SOLANA_URL
 
@@ -62,7 +57,7 @@ solana config set -u $SOLANA_URL
 
 solana config get
 
-for i in {1..10}; do
+for i in {1..30}; do
     if solana cluster-version; then break; fi
     sleep 2
 done
diff --git a/proxy/test_cancel_hanged.py b/proxy/test_cancel_hanged.py
index 7b3b0152d..241f15728 100644
--- a/proxy/test_cancel_hanged.py
+++ b/proxy/test_cancel_hanged.py
@@ -8,7 +8,6 @@
 os.environ['EVM_LOADER'] = "53DfF883gyixYNXnM7s5xhdeyV8mVk9T4i2hGV9vG9io"
 os.environ['ETH_TOKEN_MINT'] = "HPsV9Deocecw3GeZv1FkAPNCBRfuVyfw9MMwjwRe1xaU"
 os.environ['COLLATERAL_POOL_BASE'] = "4sW3SZDJB7qXUyCYKA7pFL8eCTfm3REr8oSiKkww7MaT"
-os.environ['NEON_CHAIN_ID'] = "0x6f"
 
 import base64
 import unittest
diff --git a/proxy/test_environment.py b/proxy/test_environment.py
new file mode 100644
index 000000000..36000be41
--- /dev/null
+++ b/proxy/test_environment.py
@@ -0,0 +1,45 @@
+import unittest
+import os
+from web3 import Web3
+from proxy.plugin.solana_rest_api_tools import read_elf_params
+
+proxy_url = os.environ.get('PROXY_URL', 'http://127.0.0.1:9090/solana')
+proxy = Web3(Web3.HTTPProvider(proxy_url))
+
+class Test_Environment(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls.elf_params = {}
+        read_elf_params(cls.elf_params)
+
+    def test_read_elf_params(self):
+        print("\n\nhttps://github.com/neonlabsorg/neon-evm/issues/347")
+        elf_params = {}
+        read_elf_params(elf_params)
+
+        neon_chain_id = elf_params.get('NEON_CHAIN_ID', None)
+        self.assertTrue(neon_chain_id is not None)
+        self.assertEqual(neon_chain_id, os.environ.get('NEON_CHAIN_ID', None))
+
+        neon_token_mint = elf_params.get('NEON_TOKEN_MINT', None)
+        self.assertTrue(neon_token_mint is not None)
+        self.assertEqual(neon_token_mint, os.environ.get('NEON_TOKEN_MINT', None))
+
+        neon_pool_base = elf_params.get('NEON_POOL_BASE', None)
+        self.assertTrue(neon_pool_base is not None)
+        self.assertEqual(neon_pool_base, os.environ.get('NEON_POOL_BASE', None))
+
+    def test_neon_chain_id(self):
+        print("\n\nhttps://github.com/neonlabsorg/neon-evm/issues/347")
+        neon_chain_id = os.environ.get('NEON_CHAIN_ID', None)
+        print(f"NEON_CHAIN_ID = {neon_chain_id}")
+        self.assertTrue(neon_chain_id is not None)
+
+        eth_chainId: int = proxy.eth.chain_id
+        print(f"eth_chainId = {eth_chainId}")
+        self.assertEqual(eth_chainId, int(neon_chain_id))
+
+        net_version: str = proxy.net.version
+        print(f"net_version = {net_version}")
+        self.assertEqual(net_version, neon_chain_id)
+