diff --git a/client/asset/eth/chaincfg.go b/client/asset/eth/chaincfg.go
index d4b1f0d576..5374564d0f 100644
--- a/client/asset/eth/chaincfg.go
+++ b/client/asset/eth/chaincfg.go
@@ -11,7 +11,6 @@ import (
 	"strings"
 
 	"decred.org/dcrdex/dex"
-	dexeth "decred.org/dcrdex/dex/networks/eth"
 	"github.com/ethereum/go-ethereum/common"
 	ethcore "github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/eth/ethconfig"
@@ -103,10 +102,8 @@ func ETHConfig(net dex.Network) (c ethconfig.Config, err error) {
 	case dex.Testnet:
 		c.Genesis = ethcore.DefaultSepoliaGenesisBlock()
 	case dex.Simnet:
-		c.Genesis, err = readSimnetGenesisFile()
-		if err != nil {
-			return c, fmt.Errorf("readSimnetGenesisFile error: %w", err)
-		}
+		// Args are gasLimit, faucet address.
+		c.Genesis = ethcore.DeveloperGenesisBlock(30000000, nil)
 	default:
 		return c, fmt.Errorf("unknown network %d", net)
 
@@ -123,19 +120,3 @@ func ChainConfig(net dex.Network) (c *params.ChainConfig, err error) {
 	}
 	return cfg.Genesis.Config, nil
 }
-
-// readSimnetGenesisFile reads the simnet genesis file.
-func readSimnetGenesisFile() (*ethcore.Genesis, error) {
-	dataDir, err := simnetDataDir()
-	if err != nil {
-		return nil, err
-	}
-
-	genesisFile := filepath.Join(dataDir, "genesis.json")
-	genesisCfg, err := dexeth.LoadGenesisFile(genesisFile)
-	if err != nil {
-		return nil, fmt.Errorf("error reading genesis file: %v", err)
-	}
-
-	return genesisCfg, nil
-}
diff --git a/dex/networks/erc20/contracts/TestToken.sol b/dex/networks/erc20/contracts/TestToken.sol
index 332eb4e37f..822eba0d92 100644
--- a/dex/networks/erc20/contracts/TestToken.sol
+++ b/dex/networks/erc20/contracts/TestToken.sol
@@ -2,7 +2,7 @@
 
 // This is a simplified version of OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol).
 
-pragma solidity = 0.8.18;
+pragma solidity = 0.8.28;
 
 contract TestToken {
     event Transfer(address indexed _from, address indexed _to, uint256 _value);
@@ -31,9 +31,11 @@ contract TestToken {
         _decimals = dec;
 
         _totalSupply = 44000000000000000000000;
-        _balances[0x18D65FB8d60c1199bb1Ad381bE47aA692b482605] = 11000000000000000000000; // alpha
-        _balances[0x4F8eF3892B65ED7fc356fF473a2eF2aE5EC27A06] = 11000000000000000000000; // beta
-        _balances[0xd12aB7cf72CCf1f3882eC99DDc53CD415635C3bE] = 11000000000000000000000; // delta
+    }
+
+    function setBalance(address addr, uint256 amt) public virtual returns (bool) {
+        _balances[addr] = amt;
+        return true;
     }
 
     /**
diff --git a/dex/testing/eth/create-node.sh b/dex/testing/eth/create-node.sh
index 594071ec45..bafe13844b 100755
--- a/dex/testing/eth/create-node.sh
+++ b/dex/testing/eth/create-node.sh
@@ -5,19 +5,10 @@ set -ex
 # The following are required script arguments.
 TMUX_WIN_ID=$1
 NAME=$2
-NODE_PORT=$3
-CHAIN_ADDRESS=$4
-CHAIN_PASSWORD=$5
-CHAIN_ADDRESS_JSON=$6
-CHAIN_ADDRESS_JSON_FILE_NAME=$7
-ADDRESS_JSON=$8
-ADDRESS_JSON_FILE_NAME=$9
-NODE_KEY=${10}
-SYNC_MODE=${11}
-AUTHRPC_PORT=${12}
-HTTP_PORT=${13}
-WS_PORT=${14}
-WS_MODULES=${15}
+AUTHRPC_PORT=${3}
+HTTP_PORT=${4}
+WS_PORT=${5}
+WS_MODULES=${6}
 
 GROUP_DIR="${NODES_ROOT}/${NAME}"
 MINE_JS="${GROUP_DIR}/mine.js"
@@ -33,10 +24,8 @@ geth --datadir="${NODE_DIR}" \$*
 EOF
 chmod +x "${NODES_ROOT}/harness-ctl/${NAME}"
 
-# Write mine script if CHAIN_ADDRESS is present.
-if [ "${CHAIN_ADDRESS}" != "_" ]; then
-  # The mining script may end up mining more or less blocks than specified.
-  cat > "${NODES_ROOT}/harness-ctl/mine-${NAME}" <<EOF
+# The mining script may end up mining more or less blocks than specified.
+cat > "${NODES_ROOT}/harness-ctl/mine-${NAME}" <<EOF
 #!/usr/bin/env bash
   NUM=2
   case \$1 in
@@ -60,17 +49,10 @@ if [ "${CHAIN_ADDRESS}" != "_" ]; then
 EOF
   chmod +x "${NODES_ROOT}/harness-ctl/mine-${NAME}"
 
-  # Write password file to unlock accounts later.
-  cat > "${GROUP_DIR}/password" <<EOF
-$CHAIN_PASSWORD
-EOF
-
-fi
-
 cat > "${NODE_DIR}/eth.conf" <<EOF
 [Eth]
 NetworkId = 42
-SyncMode = "${SYNC_MODE}"
+SyncMode = "snap"
 
 [Node]
 DataDir = "${NODE_DIR}"
@@ -80,67 +62,22 @@ AuthPort = ${AUTHRPC_PORT}
 NoDiscovery = true
 BootstrapNodes = []
 BootstrapNodesV5 = []
-ListenAddr = ":${NODE_PORT}"
 NetRestrict = [ "127.0.0.1/8", "::1/128" ]
-EOF
-
-# Add etherbase if mining.
-if [ "${CHAIN_ADDRESS}" != "_" ]; then
-  cat >> "${NODE_DIR}/eth.conf" <<EOF
 
 [Eth.Miner]
-Etherbase = "0x${CHAIN_ADDRESS}"
-GasFloor = 30000000
 GasCeil = 30000000
 EOF
-fi
 
 # Create a tmux window.
 tmux new-window -t "$TMUX_WIN_ID" -n "${NAME}" "${SHELL}"
 tmux send-keys -t "$TMUX_WIN_ID" "set +o history" C-m
 tmux send-keys -t "$TMUX_WIN_ID" "cd ${NODE_DIR}" C-m
 
-# Create and wait for a node initiated with a predefined genesis json.
-echo "Creating simnet ${NAME} node"
-tmux send-keys -t "$TMUX_WIN_ID" "${NODES_ROOT}/harness-ctl/${NAME} init "\
-	"$GENESIS_JSON_FILE_LOCATION; tmux wait-for -S ${NAME}" C-m
-tmux wait-for "${NAME}"
-
-# Create two accounts. The first is used to mine blocks. The second contains
-# funds.
-if [ "${CHAIN_ADDRESS}" != "_" ]; then
-  echo "Creating account"
-  cat > "${NODE_DIR}/keystore/$CHAIN_ADDRESS_JSON_FILE_NAME" <<EOF
-$CHAIN_ADDRESS_JSON
-EOF
-fi
-
-cat > "${NODE_DIR}/keystore/$ADDRESS_JSON_FILE_NAME" <<EOF
-$ADDRESS_JSON
-EOF
-
-# The node key lets us control the enode address value.
-echo "Setting node key"
-cat > "${NODE_DIR}/geth/nodekey" <<EOF
-$NODE_KEY
-EOF
-
 echo "Starting simnet ${NAME} node"
-if [ "${SYNC_MODE}" = "snap" ]; then
-  # Start the eth node with the chain account unlocked, listening restricted to
-  # localhost, and our custom configuration file.
-  tmux send-keys -t "$TMUX_WIN_ID" "${NODES_ROOT}/harness-ctl/${NAME} " \
-	  "--config ${NODE_DIR}/eth.conf --unlock ${CHAIN_ADDRESS} " \
-	  "--password ${GROUP_DIR}/password --light.serve 25 --datadir.ancient " \
-	  "${NODE_DIR}/geth-ancient --verbosity 5 --vmdebug --http --http.port " \
-	  "${HTTP_PORT} --ws --ws.port ${WS_PORT} --ws.api " \
-	  "${WS_MODULES} --allow-insecure-unlock --rpc.enabledeprecatedpersonal " \
-	  "2>&1 | tee ${NODE_DIR}/${NAME}.log" C-m
-
-else
-  # Start the eth node listening restricted to localhost and our custom
-  # configuration file.
-  tmux send-keys -t "$TMUX_WIN_ID" "${NODES_ROOT}/harness-ctl/${NAME} --allow-insecure-unlock --rpc.enabledeprecatedpersonal " \
-	  "--config ${NODE_DIR}/eth.conf --verbosity 5 ${HTTP_OPT} 2>&1 | tee " \
-	  "${NODE_DIR}/${NAME}.log" C-m
-fi
+# Start the eth node with the chain account unlocked, listening restricted to
+# localhost, and our custom configuration file.
+tmux send-keys -t "$TMUX_WIN_ID" "${NODES_ROOT}/harness-ctl/${NAME} " \
+	"--config ${NODE_DIR}/eth.conf " \
+	"--verbosity 5 --vmdebug --http --http.port " \
+	"${HTTP_PORT} --ws --ws.port ${WS_PORT} --ws.api ${WS_MODULES} " \
+	"--dev --dev.period 5 2>&1 | tee ${NODE_DIR}/${NAME}.log" C-m
diff --git a/dex/testing/eth/harness.sh b/dex/testing/eth/harness.sh
index 1f1ee3e2f0..bfa3305aed 100755
--- a/dex/testing/eth/harness.sh
+++ b/dex/testing/eth/harness.sh
@@ -1,62 +1,29 @@
 #!/usr/bin/env bash
-# tmux script that sets up an eth simnet harness. It sets up four separate nodes.
-# alpha and beta nodes are synced in snap mode. They emulate nodes used by the
-# dcrdex server. Either has the authority to mine blocks. They start with
-# pre-allocated funds. gamma and delta are synced in light mode and emulate
-# nodes used by bisonw. They are sent some funds after being created. The
-# harness waits for all nodes to sync before allowing tmux input.
+# tmux script that sets up an eth simnet harness. There is only one node in
+# --dev mode.
 set -ex
 
 SESSION="eth-harness"
 
-CHAIN_ADDRESS_JSON_FILE_NAME="UTC--2021-01-27T08-20-38.123221057Z--9ebba10a6136607688ca4f27fab70e23938cd027"
-CHAIN_ADDRESS="9ebba10a6136607688ca4f27fab70e23938cd027"
-CHAIN_ADDRESS_JSON='{"address":"9ebba10a6136607688ca4f27fab70e23938cd027","crypto":{"cipher":"aes-128-ctr","ciphertext":"dcfbe17de6f315c732855111b782496d76b2d703169afddaaa69e1bc9e02ec51","cipherparams":{"iv":"907e5e050649d1c5c0be782ec7db5cf1"},"kdf":"scrypt","kdfparams":{"dklen":32,"n":262144,"p":1,"r":8,"salt":"060f4e16d601069a6bccae0693a15cd72090baf1ab20e408c89883117d4f7c51"},"mac":"b9ca7dad75a04b77dc7751a814c051f32752603334e4bb4046caf927196a5579"},"id":"74805e39-6a2f-46eb-8125-70c41d12c6d9","version":3}'
-
-ALPHA_ADDRESS="18d65fb8d60c1199bb1ad381be47aa692b482605"
-ALPHA_ADDRESS_JSON_FILE_NAME="UTC--2021-01-28T08-47-02.993754951Z--18d65fb8d60c1199bb1ad381be47aa692b482605"
-ALPHA_ADDRESS_JSON='{"address":"18d65fb8d60c1199bb1ad381be47aa692b482605","crypto":{"cipher":"aes-128-ctr","ciphertext":"927bc2432492fc4bbe9acfe0042f5cd2cef25aff251ac1fb2f420ee85e3b6ee4","cipherparams":{"iv":"89e7333535aed5284abd52f841d30c95"},"kdf":"scrypt","kdfparams":{"dklen":32,"n":262144,"p":1,"r":8,"salt":"6fe29ea59d166989be533da62d79802a6b0cef26a9766fa363c7a4bb4c263b5f"},"mac":"c7e2b6c4538c373b2c4e0be7b343db618d39cc68fa872909059357ff36743ca0"},"id":"0e2b9cef-d659-4a26-8739-879129ed0b63","version":3}'
-ALPHA_NODE_KEY="71d810d39333296b518c846a3e49eca55f998fd7994998bb3e5048567f2f073c"
-ALPHA_ENODE="897c84f6e4f18195413c1d02927e6a4093f5e7574b52bdec6f20844c4f1f6dd3f16036a9e600bd8681ab50fd8dd144df4a6ba9dd8722bb578a86aaa8222c964f"
-ALPHA_NODE_PORT="30304"
 ALPHA_AUTHRPC_PORT="8552"
 ALPHA_HTTP_PORT="38556"
 ALPHA_WS_PORT="38557"
 ALPHA_WS_MODULES="eth"
 
-BETA_ADDRESS="4f8ef3892b65ed7fc356ff473a2ef2ae5ec27a06"
-BETA_ADDRESS_JSON_FILE_NAME="UTC--2021-01-27T08-20-58.179642501Z--4f8ef3892b65ed7fc356ff473a2ef2ae5ec27a06"
-BETA_ADDRESS_JSON='{"address":"4f8ef3892b65ed7fc356ff473a2ef2ae5ec27a06","crypto":{"cipher":"aes-128-ctr","ciphertext":"c5672bb829df9e209ca8ce18dbdd1fed69c603d639e06ab09127b672a609c121","cipherparams":{"iv":"24460eb2934c8b61cee3ad0aa7b843c0"},"kdf":"scrypt","kdfparams":{"dklen":32,"n":262144,"p":1,"r":8,"salt":"1f85da881994ca7b4a23f0698da70500a4b79f97a4450b83b129ebf3b4c28f50"},"mac":"1ecea707f1bffa1f6f944cb47e83118d8179e8a5005b83c88610b7e8692a1197"},"id":"56633762-6fb1-4cbf-8396-3a2e4661f7d4","version":3}'
-BETA_NODE_KEY="0f3f23a0f14202da009bd59a96457098acea901986629e54d5be1eea32fc404a"
-BETA_ENODE="b1d3e358ee5c9b268e911f2cab47bc12d0e65c80a6d2b453fece34facc9ac3caed14aa3bc7578166bb08c5bc9719e5a2267ae14e0b42da393f4d86f6d5829061"
-BETA_NODE_PORT="30305"
-BETA_AUTHRPC_PORT="8553"
-BETA_HTTP_PORT="38558"
-BETA_WS_PORT="38559"
-BETA_WS_MODULES="eth,txpool"
-
-# TODO: Light nodes broken as of geth 1.13.4-stable. Enable them when possible.
-
 # TESTING_ADDRESS is used by the client's internal node.
 TESTING_ADDRESS="946dfaB1AD7caCFeF77dE70ea68819a30acD4577"
-SIMNET_TOKEN_ADDRESS="946dfaB1AD7caCFeF77dE70ea68819a30acD4577"
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+TEST_TOKEN="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"
 MULTIBALANCE_BIN="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"
 
-# PASSWORD is the password used to unlock all accounts/wallets/addresses.
-PASSWORD="abc"
-
 export NODES_ROOT=~/dextest/eth
-export GENESIS_JSON_FILE_LOCATION="${NODES_ROOT}/genesis.json"
 
 if [ -d "${NODES_ROOT}" ]; then
   rm -R "${NODES_ROOT}"
 fi
 
 mkdir -p "${NODES_ROOT}/alpha"
-mkdir -p "${NODES_ROOT}/beta"
 mkdir -p "${NODES_ROOT}/harness-ctl"
 
 echo "Writing ctl scripts"
@@ -64,82 +31,38 @@ echo "Writing ctl scripts"
 # Control Scripts
 ################################################################################
 
-# Write genesis json. ".*Block" fields represent block height where certain
-# protocols take effect. "clique" is our proof of authority scheme. One block
-# can be mined per second with a signature belonging to the address in
-# "extradata". The addresses in the "alloc" field are allocated "balance".
-# Values are in wei. 1*10^18 wei is equal to one eth. Addresses are allocated
-# 11,000 eth. The addresses belong to alpha and beta nodes and two others are
-# used in tests.
-cat > "${NODES_ROOT}/genesis.json" <<EOF
-{
-  "config": {
-    "chainId": 42,
-    "homesteadBlock": 0,
-    "eip150Block": 0,
-    "eip155Block": 0,
-    "eip158Block": 0,
-    "byzantiumBlock": 0,
-    "constantinopleBlock": 0,
-    "petersburgBlock": 0,
-    "istanbulBlock": 0,
-    "muirGlacierBlock": 0,
-    "berlinBlock": 0,
-    "londonBlock": 0,
-    "arrowGlacierBlock": 0,
-    "grayGlacierBlock": 0,
-    "mergeNetSplitBlock": 0,
-    "shanghaiBlock": 0,
-    "cancunBlock": 0,
-    "clique": {
-      "period": 1,
-      "epoch": 30000
-    }
-  },
-  "difficulty": "1",
-  "gasLimit": "30000000",
-  "extradata": "0x00000000000000000000000000000000000000000000000000000000000000009ebba10a6136607688ca4f27fab70e23938cd0270000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-  "alloc": {
-    "${ALPHA_ADDRESS}": {
-        "balance": "100000000000000000000000000"
-    }
-  }
-}
-EOF
-
 cat > "${NODES_ROOT}/harness-ctl/send.js" <<EOF
-function send(from, to, value) {
-  from = from.startsWith('0x') ? from : '0x' + from
+function send(to, value) {
   to = to.startsWith('0x') ? to : '0x' + to
-  return personal.sendTransaction({ from, to, value, gasPrice: 82000000000 }, "${PASSWORD}")
+  return eth.sendTransaction({from:eth.accounts[0], to, value})
 }
 EOF
 
 cat > "${NODES_ROOT}/harness-ctl/sendtoaddress" <<EOF
 #!/usr/bin/env bash
-"${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/send.js --exec send(\"${ALPHA_ADDRESS}\",\"\$1\",\$2*1e18)"
+"${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/send.js --exec send(\"\$1\",\$2*1e18)"
 EOF
 chmod +x "${NODES_ROOT}/harness-ctl/sendtoaddress"
 
 cat > "${NODES_ROOT}/harness-ctl/deploy.js" <<EOF
-function deploy(from, contract) {
-  tx = personal.sendTransaction({from:"0x"+from,data:"0x"+contract,gasPrice:82000000000}, "${PASSWORD}")
+function deploy(contract) {
+  tx = eth.sendTransaction({from:eth.accounts[0],data:"0x"+contract})
   return tx;
 }
 
-function deployERC20(from, contract, decimals) {
+function deployERC20(contract, decimals) {
   const hexDecimals = decimals.toString(16);
   const data = "0x" + contract + hexDecimals.padStart(64, "0");
-  tx = personal.sendTransaction({from:"0x"+from,data:data,gasPrice:82000000000}, "${PASSWORD}")
+  tx = eth.sendTransaction({from:eth.accounts[0],data:data})
   return tx;
 }
 
-function deployERC20Swap(from, contract, tokenAddr) {
+function deployERC20Swap(contract, tokenAddr) {
   if (tokenAddr.slice(0, 2) === "0x") {
     tokenAddr = tokenAddr.slice(2)
   }
   var paddedAddr = tokenAddr.padStart(64, "0")
-  tx = personal.sendTransaction({from:"0x"+from,data:"0x"+contract+paddedAddr,gasPrice:82000000000}, "${PASSWORD}")
+  tx = eth.sendTransaction({from:eth.accounts[0],data:"0x"+contract+paddedAddr})
   return tx;
 }
 EOF
@@ -155,74 +78,11 @@ EOF
 HARNESS_DIR=$(dirname "$0")
 cp "${HARNESS_DIR}/create-node.sh" "${NODES_ROOT}/harness-ctl/create-node"
 
-# Reorg script
-cat > "${NODES_ROOT}/harness-ctl/reorg" <<EOF
-#!/usr/bin/env bash
-REORG_NODE="alpha"
-VALID_NODE="beta"
-REORG_DEPTH=2
-
-if [ "\$1" = "beta" ]; then
-  REORG_NODE="beta"
-  VALID_NODE="alpha"
-fi
-
-if [ "\$2" != "" ]; then
-  REORG_DEPTH=\$2
-fi
-
-echo "Before alpha, beta best blocks"
-./alpha attach --exec 'eth.getBlock(eth.blockNumber)'
-./beta attach --exec 'eth.getBlock(eth.blockNumber)'
-
-
-NODES=('alpha' 'beta')
-ENODES=($ALPHA_ENODE $BETA_ENODE)
-PORTS=($ALPHA_NODE_PORT $BETA_NODE_PORT)
-
-echo "Disconnecting nodes"
-for node in "\${NODES[@]}"
-do
-for i in {0..1}
-  do
-    "./\$node" "attach --exec admin.removePeer('enode://\${ENODES[i]}@127.0.0.1:\${PORTS[i]}')"
-  done
-done
-
-sleep 1
-
-# Uncomment to see the effect of reorgs on transactions.
-# "./alpha" "attach --exec personal.sendTransaction({from:eth.accounts[0],to:eth.accounts[1],value:1,gasPrice:82000000000},\\"${PASSWORD}\\")"
-# "./beta" "attach --exec personal.sendTransaction({from:eth.accounts[0],to:eth.accounts[1],value:1,gasPrice:82000000000},\\"${PASSWORD}\\")"
-
-"./mine-\$VALID_NODE" \$((REORG_DEPTH + 2))
-"./mine-\$REORG_NODE" \$REORG_DEPTH
-
-sleep 1
-
-echo "Connecting nodes"
-for node in "\${NODES[@]}"
-do
-for i in {0..1}
-  do
-    "./\$node" "attach --exec admin.addPeer('enode://\${ENODES[i]}@127.0.0.1:\${PORTS[i]}')"
-  done
-done
-
-sleep 1
-
-echo "After alpha, beta best blocks"
-./alpha attach --exec 'eth.getBlock(eth.blockNumber)'
-./beta attach --exec 'eth.getBlock(eth.blockNumber)'
-EOF
-chmod +x "${NODES_ROOT}/harness-ctl/reorg"
-
 # Shutdown script
 cat > "${NODES_ROOT}/harness-ctl/quit" <<EOF
 #!/usr/bin/env bash
 tmux send-keys -t $SESSION:5 C-c
 tmux send-keys -t $SESSION:1 C-c
-tmux send-keys -t $SESSION:2 C-c
 tmux kill-session
 EOF
 chmod +x "${NODES_ROOT}/harness-ctl/quit"
@@ -242,72 +102,39 @@ tmux send-keys -t $SESSION:0 "cd ${NODES_ROOT}/harness-ctl" C-m
 ################################################################################
 
 echo "Starting simnet alpha node"
-"${HARNESS_DIR}/create-node.sh" "$SESSION:1" "alpha" "$ALPHA_NODE_PORT" \
-	"$CHAIN_ADDRESS" "$PASSWORD" "$CHAIN_ADDRESS_JSON" \
-	"$CHAIN_ADDRESS_JSON_FILE_NAME" "$ALPHA_ADDRESS_JSON" "$ALPHA_ADDRESS_JSON_FILE_NAME" \
-	"$ALPHA_NODE_KEY" "snap" "$ALPHA_AUTHRPC_PORT" "$ALPHA_HTTP_PORT" "$ALPHA_WS_PORT" \
+"${HARNESS_DIR}/create-node.sh" "$SESSION:1" "alpha" \
+	"$ALPHA_AUTHRPC_PORT" "$ALPHA_HTTP_PORT" "$ALPHA_WS_PORT" \
 	"$ALPHA_WS_MODULES"
 
-echo "Starting simnet beta node"
-"${HARNESS_DIR}/create-node.sh" "$SESSION:2" "beta" "$BETA_NODE_PORT" \
-	"$CHAIN_ADDRESS" "$PASSWORD" "$CHAIN_ADDRESS_JSON" \
-	"$CHAIN_ADDRESS_JSON_FILE_NAME" "$BETA_ADDRESS_JSON" "$BETA_ADDRESS_JSON_FILE_NAME" \
-	"$BETA_NODE_KEY" "snap" "$BETA_AUTHRPC_PORT" "$BETA_HTTP_PORT" "$BETA_WS_PORT" \
-	"$BETA_WS_MODULES"
-
 # Miner
 tmux new-window -t $SESSION:5 -n "miner" $SHELL
 tmux send-keys -t $SESSION:5 "cd ${NODES_ROOT}/harness-ctl" C-m
-tmux send-keys -t $SESSION:5 "watch -n 15 ./mine-alpha 1" C-m
+# tmux send-keys -t $SESSION:5 "watch -n 15 ./mine-alpha 1" C-m
 
 sleep 1
 
-# NOTE: Connecting a node will add for both. Also, light nodes take longer to
-# set up. They will show 0 peers for some amount of time even after adding here.
-echo "Connecting nodes"
-"${NODES_ROOT}/harness-ctl/alpha" "attach --exec admin.addPeer('enode://${BETA_ENODE}@127.0.0.1:$BETA_NODE_PORT')"
-
-echo "Mining some blocks"
-# NOTE: These first couple of blocks will cause a reorg on one node or the
-# other. The reason is unknown. It seems this initial mining and reorg is
-# necessary for nodes to start communicating.
-"${NODES_ROOT}/harness-ctl/mine-beta" "2"
-"${NODES_ROOT}/harness-ctl/mine-alpha" "2"
-
 SEND_AMT=5000000000000000000000
-echo "Sending 5000 eth to beta and testing."
-"${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/send.js --exec send(\"${ALPHA_ADDRESS}\",\"${BETA_ADDRESS}\",${SEND_AMT})"
-TEST_TX_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/send.js --exec send(\"${ALPHA_ADDRESS}\",\"${TESTING_ADDRESS}\",${SEND_AMT})" | sed 's/"//g')
+echo "Sending 5000 eth to testing."
+TEST_TX_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/send.js --exec send(\"${TESTING_ADDRESS}\",${SEND_AMT})" | sed 's/"//g')
 echo "ETH transaction to use in tests is ${TEST_TX_HASH}. Saving to ${NODES_ROOT}/test_tx_hash.txt"
 cat > "${NODES_ROOT}/test_tx_hash.txt" <<EOF
 ${TEST_TX_HASH}
 EOF
 
 echo "Deploying ETHSwapV0 contract."
-ETH_SWAP_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deploy(\"${ALPHA_ADDRESS}\",\"${ETH_SWAP_V0}\")" | sed 's/"//g')
+ETH_SWAP_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deploy(\"${ETH_SWAP_V0}\")" | sed 's/"//g')
 
 echo "Deploying USDC contract."
-TEST_USDC_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deployERC20(\"${ALPHA_ADDRESS}\",\"${TEST_TOKEN}\",6)" | sed 's/"//g')
+TEST_USDC_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deployERC20(\"${TEST_TOKEN}\",6)" | sed 's/"//g')
 
 echo "Deploying USDT contract."
-TEST_USDT_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deployERC20(\"${ALPHA_ADDRESS}\",\"${TEST_TOKEN}\",6)" | sed 's/"//g')
+TEST_USDT_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deployERC20(\"${TEST_TOKEN}\",6)" | sed 's/"//g')
 
 echo "Deploying MultiBalance contract."
-MULTIBALANCE_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deploy(\"${ALPHA_ADDRESS}\",\"${MULTIBALANCE_BIN}\")" | sed 's/"//g')
-
-mine_pending_txs() {
-  while true
-  do
-    TXSLEN=$("${NODES_ROOT}/harness-ctl/alpha" "attach --exec eth.pendingTransactions.length")
-    if [ "$TXSLEN" -eq 0 ]; then
-      break
-    fi
-    echo "Waiting for transactions to be mined."
-    "${NODES_ROOT}/harness-ctl/mine-alpha" "5"
-  done
-}
+MULTIBALANCE_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deploy(\"${MULTIBALANCE_BIN}\")" | sed 's/"//g')
 
-mine_pending_txs
+#"${NODES_ROOT}/harness-ctl/mine-alpha" "1"
+sleep 60
 
 ETH_SWAP_CONTRACT_ADDR=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/contractAddress.js --exec contractAddress(\"${ETH_SWAP_CONTRACT_HASH}\")" | sed 's/"//g')
 echo "ETH SWAP contract address is ${ETH_SWAP_CONTRACT_ADDR}. Saving to ${NODES_ROOT}/eth_swap_contract_address.txt"
@@ -322,7 +149,7 @@ ${TEST_USDC_CONTRACT_ADDR}
 EOF
 
 echo "Deploying ERC20SwapV0 contract for USDC."
-USDC_SWAP_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deployERC20Swap(\"${ALPHA_ADDRESS}\",\"${ERC20_SWAP_V0}\",\"${TEST_USDC_CONTRACT_ADDR}\")" | sed 's/"//g')
+USDC_SWAP_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deployERC20Swap(\"${ERC20_SWAP_V0}\",\"${TEST_USDC_CONTRACT_ADDR}\")" | sed 's/"//g')
 
 TEST_USDT_CONTRACT_ADDR=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/contractAddress.js --exec contractAddress(\"${TEST_USDT_CONTRACT_HASH}\")" | sed 's/"//g')
 echo "Test USDT contract address is ${TEST_USDT_CONTRACT_ADDR}. Saving to ${NODES_ROOT}/test_usdt_contract_address.txt"
@@ -331,13 +158,11 @@ ${TEST_USDT_CONTRACT_ADDR}
 EOF
 
 echo "Deploying ERC20SwapV0 contract for USDT."
-USDT_SWAP_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deployERC20Swap(\"${ALPHA_ADDRESS}\",\"${ERC20_SWAP_V0}\",\"${TEST_USDT_CONTRACT_ADDR}\")" | sed 's/"//g')
-
-mine_pending_txs
+USDT_SWAP_CONTRACT_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/deploy.js --exec deployERC20Swap(\"${ERC20_SWAP_V0}\",\"${TEST_USDT_CONTRACT_ADDR}\")" | sed 's/"//g')
 
 cat > "${NODES_ROOT}/harness-ctl/loadTestToken.js" <<EOF
     // This ABI comes from running 'solc --abi TestToken.sol'
-    const testTokenABI = [{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"airdrop","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"testApprove","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
+    const testTokenABI = [{"inputs":[{"internalType":"uint8","name":"dec","type":"uint8"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"airdrop","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"},{"internalType":"uint256","name":"amt","type":"uint256"}],"name":"setBalance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"testApprove","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
     testTokenABI.forEach((el) => {
         if (el.stateMutability === "view") {
             // the constant field was deprecated and the output from solc no
@@ -347,14 +172,18 @@ cat > "${NODES_ROOT}/harness-ctl/loadTestToken.js" <<EOF
         }
     })
     var contract = web3.eth.contract(testTokenABI)
-    web3.eth.defaultAccount = web3.eth.accounts.length > 1 ? web3.eth.accounts[1] : web3.eth.accounts[0]
-    personal.unlockAccount(web3.eth.defaultAccount, '${PASSWORD}')
+    web3.eth.defaultAccount = web3.eth.accounts[0]
 
     function transfer (tokenAddr, decimals, addr, val) {
       addr = addr.startsWith('0x') ? addr : '0x'+addr
       var testToken = contract.at(tokenAddr)
       return testToken.transfer(addr, val*(10**decimals))
     }
+
+    function setBalance (tokenAddr, amt) {
+      var testToken = contract.at(tokenAddr)
+      return testToken.setBalance(web3.eth.defaultAccount, amt*1000000)
+    }
 EOF
 
 cat > "${NODES_ROOT}/harness-ctl/alphaWithToken.sh" <<EOF
@@ -375,6 +204,8 @@ cat > "${NODES_ROOT}/harness-ctl/sendUSDT" <<EOF
 EOF
 chmod +x "${NODES_ROOT}/harness-ctl/sendUSDT"
 
+sleep 60
+
 USDC_SWAP_CONTRACT_ADDR=$("${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/contractAddress.js --exec contractAddress(\"${USDC_SWAP_CONTRACT_HASH}\")" | sed 's/"//g')
 echo "ERC20 SWAP contract address is ${USDC_SWAP_CONTRACT_ADDR}. Saving to ${NODES_ROOT}/usdc_swap_contract_address.txt"
 cat > "${NODES_ROOT}/usdc_swap_contract_address.txt" <<EOF
@@ -393,9 +224,10 @@ cat > "${NODES_ROOT}/multibalance_address.txt" <<EOF
 ${MULTIBALANCE_CONTRACT_ADDR}
 EOF
 
-cd "${NODES_ROOT}/harness-ctl"
+# Add test tokens.
+"${NODES_ROOT}/harness-ctl/alpha" "attach --preload ${NODES_ROOT}/harness-ctl/loadTestToken.js --exec setBalance(\"${TEST_USDC_CONTRACT_ADDR}\",4400000000000)"
 
-mine_pending_txs
+cd "${NODES_ROOT}/harness-ctl"
 
 TEST_BLOCK10_HASH=$("${NODES_ROOT}/harness-ctl/alpha" "attach --exec eth.getHeaderByNumber(10).hash" | sed 's/"//g')
 echo "ETH block 10 hash to use in tests is ${TEST_BLOCK10_HASH}. Saving to ${NODES_ROOT}/test_block10_hash.txt"
diff --git a/dex/testing/polygon/harness.sh b/dex/testing/polygon/harness.sh
index 4c8d9edc4d..c40cdf26e6 100755
--- a/dex/testing/polygon/harness.sh
+++ b/dex/testing/polygon/harness.sh
@@ -50,7 +50,7 @@ BETA_GRPC_PORT="34986"
 
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+TEST_TOKEN="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"
 MULTIBALANCE_BIN="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"
 
 MODULES='["eth","txpool"]' # "eth,net,web3,debug,admin,personal,txpool,clique"
diff --git a/server/asset/eth/eth.go b/server/asset/eth/eth.go
index 663345476b..fcb5a9c8c1 100644
--- a/server/asset/eth/eth.go
+++ b/server/asset/eth/eth.go
@@ -145,7 +145,7 @@ func (d *Driver) Setup(cfg *asset.BackendConfig) (asset.Backend, error) {
 	case dex.Testnet:
 		chainID = params.SepoliaChainConfig.ChainID.Uint64()
 	default:
-		chainID = 42
+		chainID = 1337
 	}
 
 	return NewEVMBackend(cfg, chainID, dexeth.ContractAddresses, registeredTokens)