LN-Dymension: DA client for RollAP

Description of Laod Network integration as a Data Availability client for Dymension RollApps

Links

https://dymension.xyz

GitHub - dymensionxyz/rollapp-evm: EVM DRS - EVM Dymension Rollapp StandardGitHub

GitHub - dymensionxyz/dymint: Sequencing Engine for Dymension RollAppsGitHub

Key Details

• Load Network provides a gateway for Arweave's permanent with its own (LN) high data throughput of the permanently stored data into .

• Current maximum encoded blob size is 8 MB (8_388_608 bytes).

• Laod Network currently operating in public testnet (Alphanet) - not recommended to use it in production environment.

Prerequisites and Resources

1. Understand how to boot basic Dymension RollApp and how to configure it.

2. Obtain test tLOAD tokens through our faucet for testing purposes.
3. Monitor your transactions using the Load Network explorer.

How it works

You may choose to use Load Network as a DataAvailability layer of your RollApp. We assume that you know how to boot and configure basics of your dymint RollApp. As an example you may use https://github.com/dymensionxyz/rollapp-evm repository. Example uses "mock" DA client. To use Load Network you should simply set next environment variable before config generation step using init.sh export DA_CLIENT="weavevm" # This is the key change export WVM_PRIV_KEY="your_hex_string_wvm_priv_key_without_0x_prefix" init.sh will generate basic configuration for da_config.json in dymint.toml which should look like. da_config = '{"endpoint":"https://alphanet.load.network","chain_id":9496,"timeout":60000000000,"private_key_hex":"your_hex_string_load_priv_key_without_0x_prefix"}' In this example we use PRIVATE_KEY of your LN address. It's not the most secure way to handle transaction signing and that's why we also provide an ability to use web3signer as a signing method. To enable web3signer you will need to change init.sh script and add correspondent fields or change da_config.json in dymint.toml directly. e.g da_config = '{"endpoint":"https://alphanet.load.network","chain_id":9496,"timeout":"60000000000","web3_signer_endpoint":"http://localhost:9000"}'

and to enable tls next fields should be add to the json file:

web3_signer_tls_cert_file web3_signer_tls_key_file web3_signer_tls_ca_cert_file Web3 signer

Web3Signer is a tool by Consensys which allows remote signing.

Warnings

Using a remote signer comes with risks, please read the web3signer docs. However this is a recommended way to sign transactions for enterprise users and production environments. Web3Signer is not maintained by Load Network team. Example of the most simple local web3signer deployment (for testing purposes): https://github.com/allnil/web3signer_test_deploy Example of used configuration:

# Set environment variables
export DA_CLIENT="weavevm"  # This is the key change
export WVM_PRIV_KEY="your_hex_string_wvm_priv_key_without_0x_prefix"

export ROLLAPP_CHAIN_ID="rollappevm_1234-1"
export KEY_NAME_ROLLAPP="rol-user"
export BASE_DENOM="arax"
export MONIKER="$ROLLAPP_CHAIN_ID-sequencer"
export ROLLAPP_HOME_DIR="$HOME/.rollapp_evm"
export SETTLEMENT_LAYER="mock"

# Initialize and start
make install BECH32_PREFIX=$BECH32_PREFIX
export EXECUTABLE="rollapp-evm"
$EXECUTABLE config keyring-backend test

sh scripts/init.sh

# Verify dymint.toml configuration
cat $ROLLAPP_HOME_DIR/config/dymint.toml | grep -A 5 "da_config"

dasel put -f "${ROLLAPP_HOME_DIR}"/config/dymint.toml "max_idle_time" -v "2s"
dasel put -f "${ROLLAPP_HOME_DIR}"/config/dymint.toml "max_proof_time" -v "1s"
dasel put -f "${ROLLAPP_HOME_DIR}"/config/dymint.toml "batch_submit_time" -v "30s"
dasel put -f "${ROLLAPP_HOME_DIR}"/config/dymint.toml "p2p_listen_address" -v "/ip4/0.0.0.0/tcp/36656"
dasel put -f "${ROLLAPP_HOME_DIR}"/config/dymint.toml "settlement_layer" -v "mock"
dasel put -f "${ROLLAPP_HOME_DIR}"/config/dymint.toml "node_address" -v "http://localhost:36657"
dasel put -f "${ROLLAPP_HOME_DIR}"/config/dymint.toml "settlement_node_address" -v "http://127.0.0.1:36657"


# Start the rollapp

$EXECUTABLE start --log_level=debug \
  --rpc.laddr="tcp://127.0.0.1:36657" \
  --p2p.laddr="tcp://0.0.0.0:36656" \
  --proxy_app="tcp://127.0.0.1:36658"

in rollap-evm log you will eventually see something like this:

INFO[0000] weaveVM: successfully sent transaction[tx hash 0x8a7a7f965019cf9d2cc5a3d01ee99d56ccd38977edc636cc0bbd0af5d2383d2a]  module=weavevm
INFO[0000] wvm tx hash[hash 0x8a7a7f965019cf9d2cc5a3d01ee99d56ccd38977edc636cc0bbd0af5d2383d2a]  module=weavevm
DEBU[0000] waiting for receipt[txHash 0x8a7a7f965019cf9d2cc5a3d01ee99d56ccd38977edc636cc0bbd0af5d2383d2a attempt 0 error get receipt failed: failed to get transaction receipt: not found]  module=weavevm
INFO[0002] Block created.[height 35 num_tx 0 size 786]   module=block_manager
DEBU[0002] Applying block[height 35 source produced]     module=block_manager
DEBU[0002] block-sync advertise block[error failed to find any peer in table]  module=p2p
INFO[0002] MINUTE EPOCH 6[]                              module=x/epochs
INFO[0002] Epoch Start Time: 2025-01-13 09:21:03.239539 +0000 UTC[]  module=x/epochs
INFO[0002] commit synced[commit 436F6D6D697449447B5B3130342038203131302032303620352031323920393020343520313633203933203235322031352031343320333920313538203131342035382035352031352038322038203939203132392032333520313731203230382031392032343320313932203139203233352036355D3A32337D]
DEBU[0002] snapshot is skipped[height 35]
INFO[0002] Gossipping block[height 35]                   module=block_manager
DEBU[0002] Gossiping block.[len 792]                     module=p2p
DEBU[0002] indexed block[height 35]                      module=txindex
DEBU[0002] indexed block txs[height 35 num_txs 0]        module=txindex
INFO[0002] Produced empty block.[]                       module=block_manager
DEBU[0002] Added bytes produced to bytes pending submission counter.[bytes added 786 pending 15719]  module=block_manager
INFO[0003] data available in weavevm[wvm_tx 0x8a7a7f965019cf9d2cc5a3d01ee99d56ccd38977edc636cc0bbd0af5d2383d2a wvm_block 0xe897eab56aee50b97a0f2bd1ff47af3c834e96ca18528bb869c4eafc0df583be wvm_block_number 5651207]  module=weavevm
DEBU[0003] Submitted blob to DA successfully.[]          module=weavevm