update

go.mod

 module contract_backend
 
-go 1.22
-
-toolchain go1.22.8
+go 1.21
 
 require (
 	github.com/BurntSushi/toml v1.4.0
 	github.com/btcsuite/btcutil v1.0.2
-	github.com/ethereum/go-ethereum v1.14.11
+	github.com/ethereum/go-ethereum v1.12.2
 	github.com/gin-contrib/cors v1.7.2
 	github.com/gin-gonic/gin v1.10.0
 	github.com/google/uuid v1.3.0
@@ -18,7 +16,6 @@ require (
 )
 
 require (
-	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/StackExchange/wmi v1.2.1 // indirect
 	github.com/bits-and-blooms/bitset v1.13.0 // indirect
 	github.com/btcsuite/btcd v0.20.1-beta // indirect
@@ -27,14 +24,11 @@ require (
 	github.com/bytedance/sonic/loader v0.1.1 // indirect
 	github.com/cloudwego/base64x v0.1.4 // indirect
 	github.com/cloudwego/iasm v0.2.0 // indirect
-	github.com/consensys/bavard v0.1.13 // indirect
 	github.com/consensys/gnark-crypto v0.12.1 // indirect
-	github.com/crate-crypto/go-ipa v0.0.0-20240223125850-b1e8a79f509c // indirect
 	github.com/crate-crypto/go-kzg-4844 v1.0.0 // indirect
 	github.com/deckarep/golang-set/v2 v2.6.0 // indirect
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
 	github.com/ethereum/c-kzg-4844 v1.0.0 // indirect
-	github.com/ethereum/go-verkle v0.1.1-0.20240829091221-dffa7562dbe9 // indirect
 	github.com/fsnotify/fsnotify v1.6.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
@@ -42,6 +36,7 @@ require (
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/go-playground/validator/v10 v10.20.0 // indirect
+	github.com/go-stack/stack v1.8.1 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/gorilla/websocket v1.4.2 // indirect
 	github.com/holiman/uint256 v1.3.1 // indirect
@@ -55,7 +50,6 @@ require (
 	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mmcloughlin/addchain v0.4.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
@@ -75,6 +69,6 @@ require (
 	golang.org/x/sys v0.22.0 // indirect
 	golang.org/x/text v0.15.0 // indirect
 	google.golang.org/protobuf v1.34.2 // indirect
+	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	rsc.io/tmplfunc v0.0.3 // indirect
 )