Developer Tools

Tools for building, testing, debugging, and monitoring vProgs and Silverscript contracts on Kaspa.

CLI Tools

Silverscript Compiler

The primary tool for covenant development. Compiles Silverscript source to native Kaspa Script.

# Compile a contract
silverscript compile contract.ss --output contract.script

# Check syntax without compiling
silverscript check contract.ss

# Compile with debug output (shows generated opcodes)
silverscript compile contract.ss --debug

# [Coming Soon] Deploy to network
silverscript deploy contract.script --network testnet

Repository: github.com/kaspanet/silverscript

vProgs Node CLI

The vProgs node binary includes built-in commands for development:

# Run in simnet mode (local development)
vprogs-node --simnet

# Connect to TN12
vprogs-node --testnet

# Specify custom data directory
vprogs-node --testnet --appdir ~/.vprogs-dev

# Enable verbose logging
vprogs-node --testnet --loglevel=debug

Kaspa CLI (kaspa-cli)

General-purpose CLI for interacting with Kaspa nodes:

# Query DAG info
kaspa-cli getblockdaginfo

# Get UTXOs for an address
kaspa-cli getutxosbyaddresses kaspatest:qr...

# Submit a raw transaction
kaspa-cli submittransaction <hex>

Proof Inspector

[Coming Soon] A tool for inspecting and debugging ZK proofs before submission.

Planned features:

Feature Description
Proof validation Verify a proof locally without submitting to L1
Public input inspection Display the public inputs embedded in a proof
Verification key matching Check that a proof matches a given verification key
Proof size analysis Report proof size and estimated verification cost
Backend detection Identify whether a proof is Groth16, STARK, or other

Intended usage:

# [Coming Soon]
vprogs-tools inspect-proof proof.bin

# Output:
# Backend: Groth16
# Public inputs: [0x1234..., 0x5678...]
# Proof size: 256 bytes
# Verification: VALID

Covenant Debugger

Silverscript DAP Debugger

A Debug Adapter Protocol (DAP) debugger for Silverscript contracts is in active development. It integrates with VS Code and other DAP-compatible editors.

Planned capabilities:

  • Step through Silverscript execution
  • Inspect stack state at each opcode
  • View transaction introspection values (tx.inputs, tx.outputs, this.age)
  • Set breakpoints on require statements
  • Trace covenant state transitions

Status: In development. Track progress in the Silverscript repo.

Script-Level Debugging

For lower-level debugging, you can inspect the compiled Kaspa Script directly:

# Compile with debug info to see opcode mapping
silverscript compile contract.ss --debug

# Output shows Silverscript source lines mapped to opcodes:
# Line 12: require(checkSig(ownerSig, owner))
#   -> OP_CHECKSIGVERIFY
# Line 13: require(this.age >= lockTime)
#   -> OP_CHECKSEQUENCEVERIFY

Block Explorer Integration

[Coming Soon] Block explorer support for vProgs transactions, covenant state, and ZK proof verification.

Planned features:

Feature Description
Covenant state viewer Display current state of covenant UTXOs
ZK proof status Show proof verification results for vProg transactions
Covenant lineage Visualize UTXO lineage via Covenant IDs (KIP-20)
Lane activity Display KIP-21 lane activity and state roots
Transaction decoder Parse and display covenant transaction structure

For now, use direct RPC queries to inspect chain state. See the Testnet Guide for RPC examples.

Monitoring

Node Metrics

[Coming Soon] The vProgs node will expose Prometheus-compatible metrics:

# [Coming Soon]
vprogs-node --testnet --metrics-addr 127.0.0.1:9090

Planned metrics:

Metric Description
vprogs_proofs_verified_total Total ZK proofs verified
vprogs_proofs_rejected_total Total ZK proofs rejected
vprogs_state_root_updates State root update count per vProg
vprogs_lane_activity Active lanes and transaction throughput
vprogs_proof_verification_time_ms Proof verification latency

Log Analysis

The vProgs node uses structured logging:

# Filter logs for proof verification events
vprogs-node --testnet --loglevel=info 2>&1 | grep "proof_verified"

# Filter for state updates
vprogs-node --testnet --loglevel=debug 2>&1 | grep "state_root_updated"

Testing Utilities

Simnet for Unit Testing

Use the simnet mode for deterministic local testing:

// In your test harness
#[cfg(test)]
mod tests {
    use vprogs_test_utils::SimnetBuilder;

    #[tokio::test]
    async fn test_counter_increment() {
        let simnet = SimnetBuilder::new()
            .with_vprog(counter_vprog())
            .build()
            .await;

        // Submit a transition and verify
        let result = simnet.submit_transition(
            counter_vprog_id,
            increment_action(42),
        ).await;

        assert!(result.is_ok());
        assert_eq!(simnet.get_counter_value().await, 42);
    }
}

Third-Party Tools

Tool Author Description
Silverscript VS Code Extension IzioDev Syntax highlighting and diagnostics [Coming Soon]
VCC v2 IzioDev Visual Covenant Composer [In Development]
ZK Rollup PoC Maxim Biryukov Reference ZK covenant rollup implementation