Ethereum block builder Eureka Labs has successfully raised $6.7 million in a seed funding round co-led by Spark Capital and Collider Ventures. The investment, structured as a Simple Agreement for Future Equity plus Token Warrants, will be directed towards advancing Eureka Labs' innovative "programmable blocks" technology. Founded in December 2024, Eureka Labs has rapidly ascended to become the fourth-largest Ethereum block builder. Its "programmable blocks" technology allows for the integration of logic during block construction, facilitating features like temporary credit within blocks and state-aware pre-computation. This advancement aims to provide developers with enhanced assurance and flexibility at the block level.