@ostdotcom/ost-block-scanner v1.0.1
OST Block Scanner
OST Block Scanner parse Ethereum based chains and store data in DynamoDB. It supports multiple chains as well.
Install
npm install @ostdotcom/ost-block-scanner --save
Setup
1. Install Prerequisites
- nodejs >= 8.0.0
- Geth >=1.8.17
- Memcached
- AWS DynamoDB Service OR DynamoDBLocal.jar
- DB Browser for SQLite optionally to browse DynamoDB
2. Run DynamoDBLocal.jar, if you are not using AWS DynamoDB Service
# NOTE: Make sure to change DYNAMODB_PATH
export DYNAMODB_PATH=~/dynamodb_local_latest
java -Djava.library.path=$DYNAMODB_PATH/DynamoDBLocal_lib/ -jar $DYNAMODB_PATH/DynamoDBLocal.jar -sharedDb -dbPath $DYNAMODB_PATH/
3. Create OST Block Scanner config file
Refer ./node_modules/@ostdotcom/ost-block-scanner/config.json.example to create a new configuration file. Also set CONFIG_STRATEGY_PATH environment variable
4. Create Global DynamoDB tables:
node ./node_modules/@ostdotcom/ost-block-scanner/tools/initialSetup.js --configFile $CONFIG_STRATEGY_PATH
5. Add a new Chain and create chain specific shared DynamoDB tables:
- Mandatory parameters: chainId, networkId, configFile
Optional parameters (defaults to 1): blockShardCount, economyShardCount, economyAddressShardCount, transactionShardCount
# NOTE:
# Make sure chain configuration is already present in config file, before starting this step.
# Optional parameters are used to create entity specific sharded tables.
# By default only one shard is created for each entity.
node ./node_modules/@ostdotcom/ost-block-scanner/tools/addChain.js --configFile $CONFIG_STRATEGY_PATH --chainId 2000 --networkId 1 --blockShardCount 2 --economyShardCount 2 --economyAddressShardCount 2 --transactionShardCount 2
How to add additional shards to existing chains?
- Additional block specific data shards:
node ./node_modules/@ostdotcom/ost-block-scanner/tools/createShards/byBlock.js --configFile $CONFIG_STRATEGY_PATH --chainId 2000 --shardNumber 1
- Additional economy user(s) specific data shards:
node ./node_modules/@ostdotcom/ost-block-scanner/tools/createShards/byEconomyAddress.js --configFile $CONFIG_STRATEGY_PATH --chainId 2000 --shardNumber 1
- Additional transaction specific data shards:
node ./node_modules/@ostdotcom/ost-block-scanner/tools/createShards/byTransaction.js --configFile $CONFIG_STRATEGY_PATH --chainId 2000 --shardNumber 1
Start Block Scanner
- Mandatory parameters: chainId, configFile
- Optional parameters: startBlockNumber, endBlockNumber
node ./node_modules/@ostdotcom/ost-block-scanner/executables/blockScanner.js --configFile $CONFIG_STRATEGY_PATH --chainId 2000 --startBlockNumber 0 --endBlockNumber 100
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