ICS20

Overview

The ICS20 precompile exposes standardized IBC fungible token transfer logic to EVM contracts. Initiate cross-chain token transfers, query transfer status, and build composable cross-chain payment flows — all from Solidity. Precompile Address: 0x0000000000000000000000000000000000000802

Gas Costs

Method Type	Gas Cost
Transactions	`2000 + (30 x bytes of input)`
Queries	`1000 + (3 x bytes of input)`

Transaction Methods

Method	Signature	Returns
`transfer`	`transfer(string sourcePort,string sourceChannel,string denom,uint256 amount,address sender,string receiver,Height timeoutHeight,uint64 timeoutTimestamp,string memo)`	`(uint64 nextSequence)`

Query Methods

Method	Signature	Returns
`denom`	`denom(string hash)`	`(Denom denom)`
`denomHash`	`denomHash(string trace)`	`(string hash)`
`denoms`	`denoms(PageRequest pageRequest)`	`(Denom[] denoms, PageResponse pageResponse)`

Example

// Pseudocode: import IICS20 and construct Height timeoutHeight per the ABI reference.
IICS20 constant ics20 = IICS20(0x0000000000000000000000000000000000000802);

// Transfer tokens to another chain
ics20.transfer(
    "transfer",            // source port
    "channel-0",           // source channel
    "ctm",                 // denomination
    1000000,               // amount
    msg.sender,            // sender
    receiver,               // receiver on destination chain
    timeoutHeight,
    uint64(block.timestamp + 600),
    ""                     // memo
);

Trust Model

ICS20 transfers inherit IBC’s trust-minimized model:

No trusted intermediary required
Safety backed by light-client verification on both chains
Timeout mechanism ensures funds are never permanently locked

For exact params, events, and return values, see Precompile ABI Reference.

Learn

Core Concepts

Chain Architecture

Execution and EVM

Interoperability and IBC

Modules & Precompiles

Transaction Lifecycle

Overview

Gas Costs

Transaction Methods

Query Methods

Example

Trust Model

​Overview

​Gas Costs

​Transaction Methods

​Query Methods

​Example

​Trust Model

Overview

Gas Costs

Transaction Methods

Query Methods

Example

Trust Model