I want to add a new Organization to an existing Channel in Hyperledger Fabric.
First I obtain the channel configuration in JSON format using the following code snippet:
byte[] configBytes = channel.getChannelConfigurationBytes();
String configtxlator = props.getProperty("configtxlator");
HttpPost httppost = new HttpPost(configtxlator + "/protolator/decode/common.Config");
httppost.setEntity(new ByteArrayEntity(configBytes));
HttpClient httpclient = HttpClients.createDefault();
HttpResponse response = httpclient.execute(httppost);
int statuscode = response.getStatusLine().getStatusCode();
if (statuscode == 200) {
return EntityUtils.toString(response.getEntity());
} else {
return "";
}
The result is the following JSON string:
{
"channel_group": {
"groups": {
"Application": {
"groups": {
"Org1MSP": {
"groups": {},
"mod_policy": "Admins",
"policies": {
"Admins": {
"mod_policy": "Admins",
"policy": {
"type": 1,
"value": {
"identities": [
{
"principal": {
"msp_identifier": "Org1MSP",
"role": "ADMIN"
},
"principal_classification": "ROLE"
}
],
"rule": {
"n_out_of": {
"n": 1,
"rules": [
{
"signed_by": 0
}
]
}
},
"version": 0
}
},
"version": "0"
},
"Readers": {
"mod_policy": "Admins",
"policy": {
"type": 1,
"value": {
"identities": [
{
"principal": {
"msp_identifier": "Org1MSP",
"role": "ADMIN"
},
"principal_classification": "ROLE"
},
{
"principal": {
"msp_identifier": "Org1MSP",
"role": "PEER"
},
"principal_classification": "ROLE"
},
{
"principal": {
"msp_identifier": "Org1MSP",
"role": "CLIENT"
},
"principal_classification": "ROLE"
}
],
"rule": {
"n_out_of": {
"n": 1,
"rules": [
{
"signed_by": 0
},
{
"signed_by": 1
},
{
"signed_by": 2
}
]
}
},
"version": 0
}
},
"version": "0"
},
"Writers": {
"mod_policy": "Admins",
"policy": {
"type": 1,
"value": {
"identities": [
{
"principal": {
"msp_identifier": "Org1MSP",
"role": "ADMIN"
},
"principal_classification": "ROLE"
},
{
"principal": {
"msp_identifier": "Org1MSP",
"role": "CLIENT"
},
"principal_classification": "ROLE"
}
],
"rule": {
"n_out_of": {
"n": 1,
"rules": [
{
"signed_by": 0
},
{
"signed_by": 1
}
]
}
},
"version": 0
}
},
"version": "0"
}
},
"values": {
"AnchorPeers": {
"mod_policy": "Admins",
"value": {
"anchor_peers": [
{
"host": "peer1.org1.isprint.com",
"port": 7051
},
{
"host": "peer2.org1.isprint.com",
"port": 7051
}
]
},
"version": "0"
},
"MSP": {
"mod_policy": "Admins",
"value": {
"config": {
"admins": [],
"crypto_config": {
"identity_identifier_hash_function": "SHA256",
"signature_hash_family": "SHA2"
},
"fabric_node_ous": {
"admin_ou_identifier": {
"certificate": "...",
"organizational_unit_identifier": "admin"
},
"client_ou_identifier": {
"certificate": "...",
"organizational_unit_identifier": "client"
},
"enable": true,
"orderer_ou_identifier": {
"certificate": "...",
"organizational_unit_identifier": "orderer"
},
"peer_ou_identifier": {
"certificate": "...",
"organizational_unit_identifier": "peer"
}
},
"intermediate_certs": [],
"name": "Org1MSP",
"organizational_unit_identifiers": [],
"revocation_list": [],
"root_certs": [
"..."
],
"signing_identity": null,
"tls_intermediate_certs": [],
"tls_root_certs": [
"..."
]
},
"type": 0
},
"version": "0"
}
},
"version": "1"
}
},
"mod_policy": "Admins",
"policies": {
"Admins": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "MAJORITY",
"sub_policy": "Admins"
}
},
"version": "0"
},
"Readers": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "ANY",
"sub_policy": "Readers"
}
},
"version": "0"
},
"Writers": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "ANY",
"sub_policy": "Writers"
}
},
"version": "0"
}
},
"values": {
"Capabilities": {
"mod_policy": "Admins",
"value": {
"capabilities": {
"V1_4_2": {}
}
},
"version": "0"
}
},
"version": "1"
},
"Orderer": {
"groups": {
"OrdererOrg": {
"groups": {},
"mod_policy": "Admins",
"policies": {
"Admins": {
"mod_policy": "Admins",
"policy": {
"type": 1,
"value": {
"identities": [
{
"principal": {
"msp_identifier": "OrdererMSP",
"role": "ADMIN"
},
"principal_classification": "ROLE"
}
],
"rule": {
"n_out_of": {
"n": 1,
"rules": [
{
"signed_by": 0
}
]
}
},
"version": 0
}
},
"version": "0"
},
"Readers": {
"mod_policy": "Admins",
"policy": {
"type": 1,
"value": {
"identities": [
{
"principal": {
"msp_identifier": "OrdererMSP",
"role": "MEMBER"
},
"principal_classification": "ROLE"
}
],
"rule": {
"n_out_of": {
"n": 1,
"rules": [
{
"signed_by": 0
}
]
}
},
"version": 0
}
},
"version": "0"
},
"Writers": {
"mod_policy": "Admins",
"policy": {
"type": 1,
"value": {
"identities": [
{
"principal": {
"msp_identifier": "OrdererMSP",
"role": "MEMBER"
},
"principal_classification": "ROLE"
}
],
"rule": {
"n_out_of": {
"n": 1,
"rules": [
{
"signed_by": 0
}
]
}
},
"version": 0
}
},
"version": "0"
}
},
"values": {
"MSP": {
"mod_policy": "Admins",
"value": {
"config": {
"admins": [],
"crypto_config": {
"identity_identifier_hash_function": "SHA256",
"signature_hash_family": "SHA2"
},
"fabric_node_ous": {
"admin_ou_identifier": {
"certificate": "...",
"organizational_unit_identifier": "admin"
},
"client_ou_identifier": {
"certificate": "...",
"organizational_unit_identifier": "client"
},
"enable": true,
"orderer_ou_identifier": {
"certificate": "...",
"organizational_unit_identifier": "orderer"
},
"peer_ou_identifier": {
"certificate": "...",
"organizational_unit_identifier": "peer"
}
},
"intermediate_certs": [],
"name": "OrdererMSP",
"organizational_unit_identifiers": [],
"revocation_list": [],
"root_certs": [
"..."
],
"signing_identity": null,
"tls_intermediate_certs": [],
"tls_root_certs": [
"..."
]
},
"type": 0
},
"version": "0"
}
},
"version": "0"
}
},
"mod_policy": "Admins",
"policies": {
"Admins": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "MAJORITY",
"sub_policy": "Admins"
}
},
"version": "0"
},
"BlockValidation": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "ANY",
"sub_policy": "Writers"
}
},
"version": "0"
},
"Readers": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "ANY",
"sub_policy": "Readers"
}
},
"version": "0"
},
"Writers": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "ANY",
"sub_policy": "Writers"
}
},
"version": "0"
}
},
"values": {
"BatchSize": {
"mod_policy": "Admins",
"value": {
"absolute_max_bytes": 103809024,
"max_message_count": 100,
"preferred_max_bytes": 524288
},
"version": "0"
},
"BatchTimeout": {
"mod_policy": "Admins",
"value": {
"timeout": "30s"
},
"version": "0"
},
"Capabilities": {
"mod_policy": "Admins",
"value": {
"capabilities": {
"V1_4_2": {}
}
},
"version": "0"
},
"ChannelRestrictions": {
"mod_policy": "Admins",
"value": null,
"version": "0"
},
"ConsensusType": {
"mod_policy": "Admins",
"value": {
"metadata": {
"consenters": [
{
"client_tls_cert": "...",
"host": "orderer1.isprint.com",
"port": 7050,
"server_tls_cert": "..."
},
{
"client_tls_cert": "...",
"host": "orderer2.isprint.com",
"port": 7050,
"server_tls_cert": "..."
},
{
"client_tls_cert": "...",
"host": "orderer3.isprint.com",
"port": 7050,
"server_tls_cert": "..."
}
],
"options": {
"election_tick": 10,
"heartbeat_tick": 1,
"max_inflight_blocks": 5,
"snapshot_interval_size": 20971520,
"tick_interval": "500ms"
}
},
"state": "STATE_NORMAL",
"type": "etcdraft"
},
"version": "0"
}
},
"version": "0"
}
},
"mod_policy": "Admins",
"policies": {
"Admins": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "MAJORITY",
"sub_policy": "Admins"
}
},
"version": "0"
},
"Readers": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "ANY",
"sub_policy": "Readers"
}
},
"version": "0"
},
"Writers": {
"mod_policy": "Admins",
"policy": {
"type": 3,
"value": {
"rule": "ANY",
"sub_policy": "Writers"
}
},
"version": "0"
}
},
"values": {
"BlockDataHashingStructure": {
"mod_policy": "Admins",
"value": {
"width": 4294967295
},
"version": "0"
},
"Capabilities": {
"mod_policy": "Admins",
"value": {
"capabilities": {
"V1_4_3": {}
}
},
"version": "0"
},
"Consortium": {
"mod_policy": "Admins",
"value": {
"name": "SampleConsortium"
},
"version": "0"
},
"HashingAlgorithm": {
"mod_policy": "Admins",
"value": {
"name": "SHA256"
},
"version": "0"
},
"OrdererAddresses": {
"mod_policy": "/Channel/Orderer/Admins",
"value": {
"addresses": [
"orderer1.isprint.com:7050",
"orderer2.isprint.com:7050",
"orderer3.isprint.com:7050"
]
},
"version": "0"
}
},
"version": "0"
},
"sequence": "2"
}
I have written a code snippet using JsonPath:
DocumentContext context = JsonPath.parse(json);
String pathOrg1MSP = "$.channel_group.groups.Application.groups.Org1MSP";
Map<String,Object> mapOrg1MSP = context.read(pathOrg1MSP);
Map<String,Object> mapOrg2MSP = new LinkedHashMap<String,Object>();
mapOrg1MSP.forEach((k,v) -> {
mapOrg2MSP.put(k, v);
});
String pathOrg2MSP = "$.channel_group.groups.Application.groups";
context.put(pathOrg2MSP, "Org2MSP", mapOrg2MSP);
The intention is to create an exact clone first, then change whatever values need to be changed (peers, certs etc), and then splice it into the original Json.
- Would this achieve what I intend to do?
- What values would I need to change to prevent any possible conflicts with existing organizations?
