Managed Blockchain (AMB)
2 minute read
Managed Blockchain (AMB) is a managed service that enables the creation and management of blockchain networks, such as Hyperledger Fabric, Bitcoin, Polygon and Ethereum. Blockchain enables the development of applications in which multiple entities can conduct transactions and exchange data securely and transparently, eliminating the requirement for a central, trusted authority.
LocalStack allows you to use the AMB APIs to develop and deploy decentralized applications in your local environment. The supported APIs are available on our API Coverage Page, which provides information on the extent of AMB integration with LocalStack.
Getting started
This guide is designed for users new to AMB and assumes basic knowledge of the AWS CLI and our awslocal wrapper script.
Start your LocalStack container using your preferred method. We will demonstrate how to create a blockchain network, a node, and a proposal.
Create a blockchain network
You can create a blockchain network using the CreateNetwork API. Run the following command to create a network named OurBlockchainNet which uses the Hyperledger Fabric with the following configuration:
$ awslocal managedblockchain create-network \
--cli-input-json '{
"Name": "OurBlockchainNet",
"Description": "OurBlockchainNetDesc",
"Framework": "HYPERLEDGER_FABRIC",
"FrameworkVersion": "1.2",
"FrameworkConfiguration": {
"Fabric": {
"Edition": "STARTER"
}
},
"VotingPolicy": {
"ApprovalThresholdPolicy": {
"ThresholdPercentage": 50,
"ProposalDurationInHours": 24,
"ThresholdComparator": "GREATER_THAN"
}
},
"MemberConfiguration": {
"Name": "org1",
"Description": "Org1 first member of network",
"FrameworkConfiguration": {
"Fabric": {
"AdminUsername": "MyAdminUser",
"AdminPassword": "Password123"
}
},
"LogPublishingConfiguration": {
"Fabric": {
"CaLogs": {
"Cloudwatch": {
"Enabled": true
}
}
}
}
}
}'
{
"NetworkId": "n-X24AF1AK2GC6MDW11HYW5I5DQC",
"MemberId": "m-6VWBWHP2Y15F7TQ2DS093RTCW2"
}
Copy the NetworkId and MemberId values from the output of the above command, as we will need them in the next step.
Create a node
You can create a node using the CreateNode API. Run the following command to create a node with the following configuration:
$ awslocal managedblockchain create-node \
--node-configuration '{
"InstanceType": "bc.t3.small",
"AvailabilityZone": "us-east-1a",
"LogPublishingConfiguration": {
"Fabric": {
"ChaincodeLogs": {
"Cloudwatch": {
"Enabled": true
}
},
"PeerLogs": {
"Cloudwatch": {
"Enabled": true
}
}
}
}
}' \
--network-id n-X24AF1AK2GC6MDW11HYW5I5DQC \
--member-id m-6VWBWHP2Y15F7TQ2DS093RTCW2
{
"NodeId": "nd-77K8AI0O5BEQD1IW4L8OGKMXV7"
}
Replace the NetworkId and MemberId values in the above command with the values you copied in the previous step.
Create a proposal
You can create a proposal using the CreateProposal API. Run the following command to create a proposal with the following configuration:
$ awslocal managedblockchain create-proposal \
--actions "Invitations=[{Principal=000000000000}]" \
--network-id n-X24AF1AK2GC6MDW11HYW5I5DQC \
--member-id m-6VWBWHP2Y15F7TQ2DS093RTCW2
{
"ProposalId": "p-NK0PSLDPETJQX01Q4OLBRHP8CZ"
}
Replace the NetworkId and MemberId values in the above command with the values you copied in the previous step.