PulseVM

Appearance

State and tables ​

Contracts store state in tables — typed, multi-index collections, not arbitrary key/value blobs.

Multi-index tables ​

A table holds rows of a defined struct, identified by a primary key, and may have secondary indexes for lookups on other fields. PulseVM serves all Antelope secondary-index key types (db_idx64_*, db_idx128_*, db_idx256_*, db_idx_double_*, db_idx_long_double_*); see host functions.

rust
#[derive(Read, Write, NumBytes, Clone, PartialEq)]
#[table(primary_key = row.account.raw())]
pub struct Greeting { pub account: Name, pub text: String }

const GREETINGS: MultiIndexDefinition<Greeting> = MultiIndexDefinition::new(name!("greetings"));

Scope ​

Every table is addressed by (code, scope, table) — the contract account, a scope (often an account or symbol), and the table name. Scope lets a contract partition data (e.g. balances scoped per account, token stats scoped per symbol). It's how pulse.token keeps each holder's balance separate.

RAM ​

Table rows consume RAM, paid by an explicit payer the contract names at write time. Provisioning RAM is a resource decision; an institution or app can arrange to pay so its end users never do.

Reads are free ​

Reading tables costs nothing — over the RPC (getTableRows) or via an indexer. Auditors and regulators can be given complete, real-time read access at no cost. See Finality & Settlement.