> Source: [/docs/protocol](https://tempo.xyz/developers/docs/protocol.md) > Section: [Tempo EVM](https://tempo.xyz/developers/docs/development.md). Build on Tempo EVM: wallets and keys, transactions and fees, TIP-20 Tokens, contracts, exchange, network details, nodes, protocol specifications, and changelog. > [Documentation index](https://tempo.xyz/developers/llms.txt) · [Docs skill](https://tempo.xyz/developers/SKILL.md) > Tempo MCP: Use `search`, `find_pages`, `read_page`, and `code` at `https://mcp.tempo.xyz` for Tempo and related documentation. > If an indexed page is missing or reflects an older site, read this site’s [documentation index](https://tempo.xyz/developers/llms.txt) and Markdown pages directly. # Specifications Read the specifications for Tempo's tokens, accounts, transactions, fees, blocks, and exchange. Each link below opens the full specification. ## Core specifications * [TIP-20 Tokens](https://tempo.xyz/developers/docs/protocol/tip20/spec) — Token interfaces, memos, roles, metadata, and policy checks. * [Transfer policies](https://tempo.xyz/developers/docs/protocol/tip403/spec) — TIP-403 policy registry, authorization checks, and receive policies. * [Account Keychain](https://tempo.xyz/developers/docs/protocol/transactions/AccountKeychain) — Signing keys, permissions, expiry, and spending limits. * [Tempo Transactions](https://tempo.xyz/developers/docs/protocol/transactions/spec-tempo-transaction) — Transaction encoding, signatures, batching, and validation. * [Transaction fees](https://tempo.xyz/developers/docs/protocol/fees/spec-fee) — Fee calculation, token selection, sponsorship, and settlement. * [Fee AMM](https://tempo.xyz/developers/docs/protocol/fees/spec-fee-amm) — Fee-token conversion, liquidity accounting, and rebalancing. ## Blocks and exchange * [Block structure](https://tempo.xyz/developers/docs/protocol/blockspace/overview) — Header fields, transaction ordering, and system transactions. * [Payment lanes](https://tempo.xyz/developers/docs/protocol/blockspace/payment-lane-specification) — Payment classification and block gas constraints. * [Stablecoin DEX](https://tempo.xyz/developers/docs/protocol/exchange/spec) — Order books, swaps, liquidity, and exchange interfaces. ## How protocol changes happen Tempo Improvement Proposals (TIPs) describe protocol changes. A proposal does not establish that a feature is active. Check the [network upgrade timeline](https://tempo.xyz/developers/docs/protocol/upgrades) for testnet and mainnet activation, or read the [upgrade process](https://tempo.xyz/developers/docs/guide/node/upgrade-cadence) for operator guidance. ## Tempo Improvement Proposals TIPs are grouped below by the network upgrade that includes them, newest first. **Approval alone does not mean a change is live.** Use each upgrade's activation record to check availability on your network. **Network status as of October 9, 2026:** mainnet is on [T11](https://tempo.xyz/developers/docs/protocol/upgrades/t11); Moderato testnet is on [T12](https://tempo.xyz/developers/docs/protocol/upgrades/t12). T12 mainnet activation is scheduled for **October 13, 2026 at 14:00 UTC**. This index reconciles the [canonical TIP sources](https://github.com/tempoxyz/tempo/tree/main/tips) with the [network upgrade records](https://tempo.xyz/developers/docs/guide/node/network-upgrades). Proposal status fields can lag activation; the upgrade records determine the network status shown here. Meta TIPs collect additional fixes included in an upgrade. ### T12 **Testnet: active. Mainnet: scheduled for October 13, 2026 at 14:00 UTC.** [T12 activation and integration notes](https://tempo.xyz/developers/docs/protocol/upgrades/t12). * [TIP-1006: Burn At for TIP-20 Tokens](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1006.md) * [TIP-1088: Unify quote/swap fill logic](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1088.md) * [TIP-1095: Policy-Aware Channel Reserve Transfers](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1095.md) * [TIP-1106: Expiring Nonce Discriminators](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1106.md) * [TIP-1116: T12 Hardfork Meta TIP](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1116.md) ### T11 **Active on mainnet and testnet.** [T11 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t11). * [TIP-1093: Extend Expiring Nonce Window to Five Minutes](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1093.md) * [TIP-1100: Increase Precompile Input Gas Cost](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1100.md) * [TIP-1105: T11 Pricing Hardening Meta TIP](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1105.md) ### T10 **Active on mainnet and testnet.** [T10 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t10). * [TIP-1091: Enshrined ZoneFactory](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1091.md) ### T9 **Active on mainnet and testnet.** [T9 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t9). * [TIP-1092: TIP-20 Policy IDs in TIP-403](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1092.md) ### T8 **Active on mainnet and testnet.** [T8 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t8). * [TIP-1042: FeeAMM TIP-403 Policy Exemptions](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1042.md) * [TIP-1062: Versioned DEX order storage](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1062.md) * [TIP-1070: Current Committee State](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1070.md) * [TIP-1075: Deprecate TIP-20 Rewards](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1075.md) — final shutdown, following T7. * [TIP-1087: V2 DEX order storage with book indexes](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1087.md) ### T7 **Active on mainnet and testnet.** [T7 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t7). * [TIP-1060: Storage Credits](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1060.md) * [TIP-1064: StablecoinDEX Order Storage Credits](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1064.md) * [TIP-1066: TIP-20 Channel Storage Credits](https://tempo.xyz/developers/docs/protocol/upgrades/t7#technical-references) * [TIP-1067: Dynamic Base Fee](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1067.md) * [TIP-1075: Deprecate TIP-20 Rewards](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1075.md) — initial deprecation; shutdown completes in T8. TIP-1066 is referenced by the T7 upgrade record but has no standalone file in the canonical TIP directory; its link opens that upgrade reference. ### T6 **Active on mainnet and testnet.** [T6 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t6). * [TIP-1028: Address-Level Receive Policies](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1028.md) * [TIP-1049: Admin Access Keys](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1049.md) ### T5 **Active on mainnet and testnet.** [T5 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t5). * [TIP-1026: Token Logo URI](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1026.md) * [TIP-1030: Allow same-tick flip orders](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1030.md) * [TIP-1033: Two-Hop FeeAMM Routing](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1033.md) * [TIP-1034: TIP-20 Channel Reserve Precompile](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1034.md) * [TIP-1035: Implicit Approval List](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1035.md) * [TIP-1045: Payment Transaction Classification](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1045.md) * [TIP-1053: Witnesses in Key Authorizations](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1053.md) * [TIP-1056: Keep the same order ID when flip orders flip](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1056.md) * [TIP-1057: T5 Hardfork Meta TIP](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1057.md) ### T4 **Active on mainnet and testnet.** [T4 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t4). * [TIP-1031: Embed consensus context in the block Header](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1031.md) * [TIP-1046: T4 Hardfork Meta TIP](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1046.md) ### T3 **Active on mainnet and testnet.** [T3 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t3). * [TIP-1011: Enhanced Access Key Permissions](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1011.md) * [TIP-1020: Signature Verification Precompile](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1020.md) * [TIP-1022: Virtual Addresses for TIP-20 Deposit Forwarding](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1022.md) * [TIP-1038: T3 Meta TIP](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1038.md) ### T2 **Active on mainnet and testnet.** [T2 upgrade details](https://tempo.xyz/developers/docs/protocol/upgrades/t2). * [TIP-1004: Permit for TIP-20](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1004.md) * [TIP-1015: Compound Transfer Policies](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1015.md) * [TIP-1017: Validator Config V2 precompile](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1017.md) * [TIP-1036: T2 Meta TIP](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1036.md) ### T1 **Active on mainnet and testnet.** * [TIP-1000: State Creation Cost Increase](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1000.md) * [TIP-1009: Expiring Nonces](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1009.md) * [TIP-1010: Mainnet Gas Parameters](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1010.md) ### T0 — launch **Active on mainnet and testnet.** * [TIP-0001: Tempo Transaction](https://github.com/tempoxyz/tempo/blob/main/tips/tip-0001.md) ### Proposals outside activated upgrades These proposals are not included in the activated-upgrade groups above. A target upgrade in a draft is not a confirmed activation. See the linked proposal for its current status. | Proposal | Status at review | Target upgrade | | --- | --- | --- | | [TIP-1001: Place-only mode for next quote token](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1001.md) | Draft | Not assigned | | [TIP-1002: Prevent crossed orders and allow same-tick flip orders](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1002.md) | Draft | Not assigned | | [TIP-1003: Client order IDs](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1003.md) | Draft | Not assigned | | [TIP-1005: Fix ask swap rounding loss](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1005.md) | Draft | Not assigned | | [TIP-1007: Fee Token Introspection](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1007.md) | Backlog | Not assigned | | [TIP-1016: Exempt Storage Creation from Gas Limits](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1016.md) | Backlog | Not assigned | | [TIP-1047: Revert code creation and set code at addresses with TIP-20 prefix](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1047.md) | Draft | Not assigned | | [TIP-1059: Discounted Pure Payment Transfers](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1059.md) | Withdrawn | None (withdrawn or cancelled) | | [TIP-1065: Repurpose TIP-20 Balance slots into User State](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1065.md) | Withdrawn | None (withdrawn or cancelled) | | [TIP-1096: Multi-block Tempo Imports for Zones](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1096.md) | Draft | T13 | | [TIP-1098: Nitro-Backed Zone Batch Verification](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1098.md) | Draft | T13 | | [TIP-1099: RLP-Encoded Account Keychain Mutations](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1099.md) | Cancelled | None (withdrawn or cancelled) | | [TIP-1119: Explicit block system calls](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1119.md) | Draft | T13 | | [TIP-1122: Backward compatible SWAPN, DUPN, EXCHANGE](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1122.md) | Draft | Not assigned | | [TIP-1124: Increase Calldata Floor Cost](https://github.com/tempoxyz/tempo/blob/main/tips/tip-1124.md) | Draft | Not assigned | [TIP-0000: TIP Process](https://github.com/tempoxyz/tempo/blob/main/tips/tip-0000.md) defines the proposal lifecycle and is not a network upgrade. Browse [all proposals](https://tips.sh/) for ongoing work. For Zone behavior and interfaces, see the [Zones protocol reference](https://tempo.xyz/developers/docs/protocol/zones).