feat(spartan): add SEQ_BLOCK_DURATION_MS and SEQ_BUILD_CHECKPOINT_IF_EMPTY env vars

Bridge sequencer configuration env vars through the deployment infrastructure
so they can be set in environment files and passed to validator pods.

- SEQ_BLOCK_DURATION_MS: Duration per block when building multiple blocks per slot
- SEQ_BUILD_CHECKPOINT_IF_EMPTY: Build empty checkpoint if there are no txs

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: spalladino

spartan/scripts/deploy_network.sh

@@ -99,6 +99,8 @@ fi
 PROVER_FAILED_PROOF_STORE=${PROVER_FAILED_PROOF_STORE:-}
 SEQ_MIN_TX_PER_BLOCK=${SEQ_MIN_TX_PER_BLOCK:-0}
 SEQ_MAX_TX_PER_BLOCK=${SEQ_MAX_TX_PER_BLOCK:-8}
+SEQ_BLOCK_DURATION_MS=${SEQ_BLOCK_DURATION_MS:-}
+SEQ_BUILD_CHECKPOINT_IF_EMPTY=${SEQ_BUILD_CHECKPOINT_IF_EMPTY:-}
 PROVER_REPLICAS=${PROVER_REPLICAS:-4}
 PROVER_AGENTS_PER_PROVER=${PROVER_AGENTS_PER_PROVER:-1}
 R2_ACCESS_KEY_ID=${R2_ACCESS_KEY_ID:-}
@@ -484,6 +486,8 @@ VALIDATOR_PUBLISHERS_PER_VALIDATOR_KEY = ${PUBLISHERS_PER_VALIDATOR_KEY}
 VALIDATOR_HA_REPLICAS = ${VALIDATOR_HA_REPLICAS}
 SEQ_MIN_TX_PER_BLOCK = ${SEQ_MIN_TX_PER_BLOCK}
 SEQ_MAX_TX_PER_BLOCK = ${SEQ_MAX_TX_PER_BLOCK}
+SEQ_BLOCK_DURATION_MS = ${SEQ_BLOCK_DURATION_MS:-null}
+SEQ_BUILD_CHECKPOINT_IF_EMPTY = ${SEQ_BUILD_CHECKPOINT_IF_EMPTY:-null}
 PROVER_MNEMONIC = "${LABS_INFRA_MNEMONIC}"
 PROVER_PUBLISHER_MNEMONIC_START_INDEX = ${PROVER_PUBLISHER_MNEMONIC_START_INDEX}
 PROVER_PUBLISHERS_PER_PROVER = ${PUBLISHERS_PER_PROVER}

spartan/terraform/deploy-aztec-infra/main.tf

@@ -192,6 +192,8 @@ locals {
     "validator.node.proverRealProofs"                          = var.PROVER_REAL_PROOFS
     "validator.node.env.SEQ_MIN_TX_PER_BLOCK"                  = var.SEQ_MIN_TX_PER_BLOCK
     "validator.node.env.SEQ_MAX_TX_PER_BLOCK"                  = var.SEQ_MAX_TX_PER_BLOCK
+    "validator.node.env.SEQ_BLOCK_DURATION_MS"                 = var.SEQ_BLOCK_DURATION_MS
+    "validator.node.env.SEQ_BUILD_CHECKPOINT_IF_EMPTY"         = var.SEQ_BUILD_CHECKPOINT_IF_EMPTY
     "validator.node.env.P2P_TX_POOL_DELETE_TXS_AFTER_REORG"    = var.P2P_TX_POOL_DELETE_TXS_AFTER_REORG
     "validator.node.env.L1_PRIORITY_FEE_BUMP_PERCENTAGE"       = var.VALIDATOR_L1_PRIORITY_FEE_BUMP_PERCENTAGE
     "validator.node.env.L1_PRIORITY_FEE_RETRY_BUMP_PERCENTAGE" = var.VALIDATOR_L1_PRIORITY_FEE_RETRY_BUMP_PERCENTAGE

spartan/terraform/deploy-aztec-infra/variables.tf

@@ -337,6 +337,20 @@ variable "SEQ_MAX_TX_PER_BLOCK" {
   default     = "8"
 }
 
+variable "SEQ_BLOCK_DURATION_MS" {
+  description = "Duration per block in milliseconds when building multiple blocks per slot"
+  type        = string
+  nullable    = true
+  default     = null
+}
+
+variable "SEQ_BUILD_CHECKPOINT_IF_EMPTY" {
+  description = "Have sequencer build and publish an empty checkpoint if there are no txs"
+  type        = string
+  nullable    = true
+  default     = null
+}
+
 variable "SENTINEL_ENABLED" {
   description = "Whether to enable sentinel"
   type        = string