Which settlement rail for
autonomous work?
Ergo, Ethereum, Solana, and Cardano compared across the traits that matter when autonomous work needs payment, acceptance rules, receipts, policy checks, and settlement.
Reentrancy-safe
Can autonomous agent code be exploited via reentrancy attacks?
eUTXO: each UTxO spent exactly once. Reentrancy impossible by design.
Account model with shared state. DAO hack was reentrancy. Agents at risk.
No reentrancy in Solana's execution model.
eUTXO model like Ergo. No reentrancy by design.
Deterministic fees
Agent knows exact transaction cost before submitting.
Fee calculated from input/output sizes. Fully deterministic before submission.
Gas price volatile. EIP-1559 improves predictability but agents still face uncertainty.
Base fees predictable, but priority fees vary with congestion.
Fee formula is deterministic from transaction size.
Acceptance predicates
Payment can encode 'accept only if task X is complete' logic on-chain.
ErgoScript makes task-conditioned spending rules natural inside eUTXO boxes.
Possible via escrow contracts, but not embedded in the payment instrument itself.
No equivalent primitive. Would require complex off-chain coordination.
Plutus scripts can encode conditions, but not as payment-embedded predicates.
Note + Reserve stack
Protocol-level bearer instruments with collateral backing for agent credit.
Note+Reserve+Tracker is a first-class pattern. ChainCash is open-source prototype implementation.
No equivalent protocol primitive. Would require custom token + escrow + oracle.
No equivalent primitive.
Can be built in Plutus but not a native pattern.
Babel Fees (supported token fee paths)
Agents can cover transaction fees through supported token-to-ERG paths, reducing native-token bootstrapping.
Babel Fees are live on Ergo mainnet. Agents can avoid pre-funded ERG wallets where a supported Babel-fee path exists.
ERC-4337 account abstraction allows gas sponsorship, but complex and costly.
SOL required for fees. No equivalent gas abstraction.
ADA required for fees in the base protocol.
MEV exposure
Transactions can be front-run or reordered by miners/validators.
eUTXO reduces common MEV vectors by making state and outputs explicit; dApp and mempool design still matter.
Significant MEV. Front-running and sandwich attacks common on agent transactions.
MEV present. Jito bundles and searchers actively extract from Solana transactions.
eUTXO also limits MEV. Batchers introduce some centralization but minimal MEV.
Micropayment viability
Sub-cent payments ($0.001) are economically viable.
~$0.01 per tx on mainnet. $0.001 API calls viable with Note batching.
Gas often $0.50–$5+ per tx. Sub-cent payments never economically viable on L1.
$0.00025 base fee. Micropayments viable.
~$0.17 min tx. Too high for true micropayments.
Chain halt history
Has the network had full outages? Critical for autonomous agent infrastructure.
No chain halts. PoW provides continuous liveness without governance emergencies.
No full halts. Some finality issues post-merge but chain keeps producing blocks.
Multiple full chain halts. 7+ documented outages. Unacceptable for agent infra.
No significant chain halts.
Ephemeral agent support
Agents can operate without persistent identity, KYC, or pre-registered wallets.
Any key pair can transact. Babel Fees can reduce ERG bootstrapping where a supported fee path exists.
Any address can transact but ETH required for gas. ERC-4337 helps but adds complexity.
Any keypair can transact. SOL for fees required.
Any key can transact. ADA for fees required.
Fair launch / censorship resistance
No foundation kill switch. No governance emergency stop for agent infrastructure.
PoW with no pre-mine, no foundation token, no validator cartel. No kill switch.
Foundation has significant influence. OFAC compliance led to ~72% MEV-boost censorship.
Foundation and validators have coordinated chain restarts. Governance intervention possible.
IOHK/Emurgo/CF have significant governance power. Less decentralized than Ergo.
What makes Ergo a strong fit
These are structural properties of Ergo's protocol that line up well with task-conditioned payments, receipt bundles, wallet policy and audit-gated settlement.
Reentrancy-free by design (eUTXO)
eUTXO architecture makes reentrancy attacks structurally impossible. Critical for autonomous agent code executing without human oversight.
Task-conditioned acceptance predicates
ErgoScript can place task-completion logic directly in eUTXO spending rules, reducing the amount of custom application-layer machinery needed for work settlement.
Combines Babel Fees with the Note stack
Agents can reduce native-token bootstrapping where supported Babel-fee paths exist. The Note+Reserve+Tracker stack is protocol-level, not application-layer.
No chain halts + PoW liveness
Agent infrastructure requires 24/7 liveness. Ergo's PoW has no governance emergency stops, no validator cartel, no foundation kill switch.
Ready to build agent payments on Ergo?
From zero to your first testnet transaction in under 10 minutes.