diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..f8b6555 --- /dev/null +++ b/.gitignore @@ -0,0 +1,24 @@ +# If you prefer the allow list template instead of the deny list, see community template: +# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore +# +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ + +# Go workspace file +go.work +go.work.sum + +**/temp/* \ No newline at end of file diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..9aeb3a0 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,22 @@ +# Stage 1: Build the Go application +FROM golang:1.22.4-alpine@sha256:ace6cc3fe58d0c7b12303c57afe6d6724851152df55e08057b43990b927ad5e8 AS builder + +WORKDIR /app + +# Copy the application code and download dependencies +COPY . . +RUN go mod download + +# Build the Go application +RUN go build -o wallet-checker + +# Stage 2: Create a minimal image with the built binary +FROM alpine:latest + +WORKDIR /app + +# Copy the binary from the builder stage +COPY --from=builder /app/wallet-checker . + +# Run the binary +ENTRYPOINT ["./wallet-checker"] diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/README.md b/README.md new file mode 100644 index 0000000..66b6dc6 --- /dev/null +++ b/README.md @@ -0,0 +1,90 @@ +# Wallet Balance Checker + +This service periodically checks the balance of specified Ethereum wallets and sends alerts to a Slack channel if the balance falls below a defined threshold. The service is built with Go and can be run inside a Docker container. + +## Features + +- Periodically checks Ethereum wallet balances. +- Sends alerts to a Slack channel if the balance is below the threshold. +- Configurable via a YAML file. +- Runs as a Docker container. + +## Prerequisites + +- Docker +- Go 1.22.4 (if running locally) + +## Configuration + +Create a `config.yaml` file with the following structure: + +```yaml +slackWebhook: "https://hooks.slack.com/services/your/slack/webhook" +rpcUrl: "https://eth.llamarpc.com" +explorerUrl: "https://etherscan.io/" +intervalInSecs: 600 +wallets: + - name: "My-wallet-1" + address: "0xC2Ae2e17fE7A18CcA845bf59899C4eAAAAAAAAAA" + thresholdInEth: 1 + - name: "My-wallet-2" + address: "0xC2Ae2e17fE7A18CcA845bf59899C4eBBBBBBBBBB" + thresholdInEth: 0.001 +``` + +## Building and Running +### Using Docker +**Note:** The pre-built Docker image can be found [here](https://hub.docker.com/repository/docker/chainsafeinfra/wallet-checker/general) +1. Build the Docker image: + + ```sh + docker build -t wallet-checker . + ``` +2. Create and update the `config.yaml` file: + ```sh + cp sample-config.yaml config.yaml + nano config.yaml + ``` + +3. Run the Docker container: + ```sh + docker run -d --name wallet-checker-container -v ./config.yaml:/app/config.yaml wallet-checker + ``` + +### Running Locally + +1. Install dependencies: + ```sh + go mod download + ``` + +2. Build the application: + ```sh + go build -o wallet-checker + ``` +3. Create and update the `config.yaml` file: + ```sh + cp sample-config.yaml config.yaml + nano config.yaml + ``` +4. Run the application: + ```sh + ./wallet-checker + ``` + +## Logging +The service logs important events, including balance checks and alerts, with timestamps. Logs are printed to the standard output. + +## Slack Alerts +If a wallet’s balance falls below the defined threshold, an alert is sent to the configured Slack channel. The alert includes: + +- Wallet name +- Current balance +- Threshold +- Link to the wallet on the explorer + +## Contributing +Contributions are welcome! Please open an issue or submit a pull request. + +## Contact +For questions or support, please contact [devops@chainsafe.io]. \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..7529aa7 --- /dev/null +++ b/go.mod @@ -0,0 +1,24 @@ +module wallet-balance-alert + +go 1.22.4 + +require ( + github.com/ethereum/go-ethereum v1.14.7 + gopkg.in/yaml.v2 v2.4.0 +) + +require ( + github.com/Microsoft/go-winio v0.6.2 // indirect + github.com/StackExchange/wmi v1.2.1 // indirect + github.com/deckarep/golang-set/v2 v2.6.0 // indirect + github.com/go-ole/go-ole v1.3.0 // indirect + github.com/gorilla/websocket v1.4.2 // indirect + github.com/holiman/uint256 v1.3.0 // indirect + github.com/shirou/gopsutil v3.21.4-0.20210419000835-c7a38de76ee5+incompatible // indirect + github.com/tklauser/go-sysconf v0.3.12 // indirect + github.com/tklauser/numcpus v0.6.1 // indirect + golang.org/x/crypto v0.22.0 // indirect + golang.org/x/exp v0.0.0-20231110203233-9a3e6036ecaa // indirect + golang.org/x/sys v0.20.0 // indirect + gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..88bbf10 --- /dev/null +++ b/go.sum @@ -0,0 +1,75 @@ +github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY= +github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU= +github.com/StackExchange/wmi v1.2.1 h1:VIkavFPXSjcnS+O8yTq7NI32k0R5Aj+v39y29VYDOSA= +github.com/StackExchange/wmi v1.2.1/go.mod h1:rcmrprowKIVzvc+NUiLncP2uuArMWLCbu9SBzvHz7e8= +github.com/bits-and-blooms/bitset v1.10.0 h1:ePXTeiPEazB5+opbv5fr8umg2R/1NlzgDsyepwsSr88= +github.com/bits-and-blooms/bitset v1.10.0/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8= +github.com/btcsuite/btcd/btcec/v2 v2.2.0 h1:fzn1qaOt32TuLjFlkzYSsBC35Q3KUjT1SwPxiMSCF5k= +github.com/btcsuite/btcd/btcec/v2 v2.2.0/go.mod h1:U7MHm051Al6XmscBQ0BoNydpOTsFAn707034b5nY8zU= +github.com/consensys/bavard 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v0.0.3/go.mod h1:AG3sTPzElb1Io3Yg4voV9AGZJuleGAwaVRxL9M49PhA= diff --git a/main.go b/main.go new file mode 100644 index 0000000..09be73b --- /dev/null +++ b/main.go @@ -0,0 +1,124 @@ +package main + +import ( + "bytes" + "context" + "encoding/json" + "fmt" + "log" + "math/big" + "net/http" + "os" + "time" + + "github.com/ethereum/go-ethereum/rpc" + "gopkg.in/yaml.v2" +) + +type Config struct { + SlackWebhook string `yaml:"slackWebhook"` + RpcUrl string `yaml:"rpcUrl"` + ExplorerUrl string `yaml:"explorerUrl"` + IntervalInSecs int `yaml:"intervalInSecs"` + Wallets []struct { + Name string `yaml:"name"` + Address string `yaml:"address"` + ThresholdInEth float64 `yaml:"thresholdInEth"` + } `yaml:"wallets"` +} + +func main() { + // Create a new logger that writes to stdout with date and time + logger := log.New(os.Stdout, "", log.LstdFlags) + + // Read the YAML file + data, err := os.ReadFile("config.yaml") + if err != nil { + logger.Fatalf("error: %v", err) + } + + // Parse the YAML file + var config Config + err = yaml.Unmarshal(data, &config) + if err != nil { + logger.Fatalf("error: %v", err) + } + + // Assign the Slack webhook URL to a variable + slackWebhookURL := config.SlackWebhook + logger.Println("Slack Webhook URL: True") + + // Log the interval in seconds + interval := time.Duration(config.IntervalInSecs) * time.Second + logger.Printf("Interval in Seconds: %d\n", config.IntervalInSecs) + + // Connect to the Ethereum RPC endpoint + client, err := rpc.Dial(config.RpcUrl) + if err != nil { + logger.Fatalf("Failed to connect to the Ethereum client: %v", err) + } + + // Run the wallet balance check in a loop + for { + checkWalletBalances(client, config, slackWebhookURL, logger) + time.Sleep(interval) + } +} + +func checkWalletBalances(client *rpc.Client, config Config, slackWebhookURL string, logger *log.Logger) { + for _, wallet := range config.Wallets { + balance, err := getBalance(client, wallet.Address) + if err != nil { + logger.Printf("Failed to get balance for wallet %s: %v\n", wallet.Name, err) + continue + } + balanceInEth := new(big.Float).Quo(new(big.Float).SetInt(balance), big.NewFloat(1e18)) + logger.Printf("Wallet Name: %s, Address: %s, Balance: %f ETH, Threshold in ETH: %f\n", wallet.Name, wallet.Address, balanceInEth, wallet.ThresholdInEth) + + // Check if the balance is less than the threshold + if balanceInEth.Cmp(big.NewFloat(wallet.ThresholdInEth)) < 0 { + explorerLink := fmt.Sprintf("%s/address/%s", config.ExplorerUrl, wallet.Address) + warningMessage := fmt.Sprintf("*Warning: Low Wallet Balance*\n*Wallet Name:* %s\n*Balance:* %f ETH\n*Threshold:* %f ETH\n*Details:* %s", wallet.Name, balanceInEth, wallet.ThresholdInEth, explorerLink) + logger.Println(warningMessage) + sendSlackNotification(slackWebhookURL, warningMessage) + } + } +} + +func getBalance(client *rpc.Client, address string) (*big.Int, error) { + var result string + err := client.CallContext(context.Background(), &result, "eth_getBalance", address, "latest") + if err != nil { + return nil, err + } + balance := new(big.Int) + balance.SetString(result[2:], 16) // Convert hex string to big.Int + return balance, nil +} + +func sendSlackNotification(webhookURL, message string) { + payload := map[string]interface{}{ + "attachments": []map[string]interface{}{ + { + "color": "danger", // This sets the color to red + "text": message, + }, + }, + } + payloadBytes, err := json.Marshal(payload) + if err != nil { + log.Printf("Failed to marshal Slack payload: %v\n", err) + return + } + + resp, err := http.Post(webhookURL, "application/json", bytes.NewBuffer(payloadBytes)) + if err != nil { + log.Printf("Failed to send Slack notification: %v\n", err) + return + } + defer resp.Body.Close() + + if resp.StatusCode != http.StatusOK { + log.Printf("Slack notification failed with status: %s\n", resp.Status) + } +} diff --git a/sample-config.yaml b/sample-config.yaml new file mode 100644 index 0000000..c116d69 --- /dev/null +++ b/sample-config.yaml @@ -0,0 +1,11 @@ +slackWebhook: "https://hooks.slack.com/services/your/slack/webhook" +rpcUrl: "https://eth.llamarpc.com" +explorerUrl: "https://etherscan.io/" +intervalInSecs: 600 +wallets: + - name: "My-wallet-1" + address: "0xC2Ae2e17fE7A18CcA845bf59899C4eAAAAAAAAAA" + thresholdInEth: 1 + - name: "My-wallet-2" + address: "0xC2Ae2e17fE7A18CcA845bf59899C4eBBBBBBBBBB" + thresholdInEth: 0.001