How TRON solidifies a block

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Just produced

pending transaction new block, and the producing SR's ring SRs that built on the block solidified SR Partner (rank 28 to 127) succeeded failed, fee still paid the block's real producer SRs that built on the watched block

Wallets send signed transactions to any node, which checks the sender can pay in bandwidth (bytes) and, for contract calls, energy. Staked TRX covers both; without it, TRX is burned.
Time is cut into 3-second slots, and the 27 Super Representatives own them in turn, in order of votes. This slot belongs to SR 1 of 27 (ringed). It packs the block and signs it; the next in line is ringed faintly.
The producer sends the block to its peers, who check the signature, that the slot really was this SR's, and every transaction, then pass it on. It reaches the whole network in well under a slot.
Nobody votes. Each following SR simply produces its own block on top, and that counts as its acknowledgement. Here the next 18 slots are fast-forwarded. SRs on board: 1 of 19.
Once 70 % of the SRs, 19 of 27, have produced at or above it, the block is solidified: nodes will never roll it back. That takes about 19 blocks, just under a minute.
The producer earns 8 TRX for the block, and 128 TRX more is shared by the top 127 candidates by votes, the SR Partners included, who pass most of it to their voters. Fees aren't paid to anyone: they're burned.

The producer, the SRs that build on a block, and its solidification are all real: each block names its producer, and the node reports its newest solidified block. Only the relay between nodes is a replay. Pick any step to study it in step-by-step mode.

Transaction types, by share of each block Waiting for the first block

How this is counted

Every transaction in a block counts once, whether it succeeded or failed. A USDT transfer calls transfer(address,uint256) on Tether's TRC-20 contract; another token transfer is that call on any other contract, or a TRC-10 transfer; a TRX transfer moves TRX between accounts; staking and resources covers staking, unstaking, delegating energy or bandwidth, and voting; any other smart-contract call is a contract call.

Transactions per block Waiting for the first block

succeeded
failed (fee paid)

TRON blocks 0 tx in this block 0.0 TRX burned 0 SRs · 0 partners · 0 TRX voted – blocks to solidified

The parts that make this work

Delegated proof of stake

TRON doesn't pick block producers by lottery or by hashing. TRX holders stake their coins, which gives them TRON Power at one vote per staked TRX, and vote for candidates. Anyone can stand by burning 9,999 TRX. The 27 candidates with the most votes are the Super Representatives (SRs) and produce every block; ranks 28 to 127 are SR Partners, who don't produce blocks but share the voting rewards. On October 1, 2026, 445 candidates were registered with about 43.6 billion TRX of votes between them, 42.4 billion of it on the 27 SRs; the largest held about 5.0 billion, the 27th about 0.6 billion. Unstaking takes 14 days, so votes can't be moved in a hurry.

Slots and turns

Time is divided into 3-second slots counted from genesis. The SRs are ranked by votes, ties broken by address, and slot n belongs to the SR at position n mod 27, so a full round takes 81 seconds and every SR gets the same number of blocks however many votes it has. If an SR misses its slot there is simply no block for those 3 seconds, and the next SR builds on the last one. Every 6 hours a maintenance period tallies the votes, re-elects the 27 and sets the new order; production skips two slots while it happens.

Solidified blocks

There are no separate vote messages. Producing a block on top of another is the acknowledgement. A block is solidified, irreversible, once at least 70 % of the SRs have produced a block at or above it: 19 of 27, the producer and the next 18. java-tron works it out by sorting each SR's latest block number and taking the ninth lowest. In practice the solidified block trails the head by about 19 blocks, just under a minute, which is the gap live mode shows. Exchanges usually credit a deposit once it's solidified, and every node serves solidified-only data under its /walletsolidity API.

Rewards

Each block pays its producer 8 TRX, and adds 128 TRX to a voting-reward pool shared by the top 127 candidates in proportion to their votes. Each SR or partner keeps a share it sets, the brokerage (20 % by default), and the rest goes to the accounts that voted for it, which is why staking and voting earns a return. Those figures are on-chain chain parameters, and SRs can change them by proposal; they read 8 and 128 TRX on October 1, 2026.

Bandwidth and energy

TRON has no gas price auction. Every transaction uses bandwidth, one unit per byte, and smart-contract calls also use energy, one unit per step of computation. Each account gets 600 bandwidth a day free, and staking TRX for bandwidth or energy gives a daily allowance in proportion to the stake. Staked resources can be delegated to another account, and a busy rental market grew up around that. If an account doesn't have enough, the shortfall is paid by burning TRX: 1,000 sun (0.001 TRX) per byte and 100 sun per unit of energy. That TRX is destroyed, not paid to the producer. A USDT transfer uses 64,285 energy, or 130,285 when the recipient has never held USDT, so about 6.4 or 13 TRX if paid by burning. Most are paid with staked or rented energy instead.

USDT on TRON

TRON carries more Tether than any other chain. On October 1, 2026 the USDT contract on TRON (TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t) reported a total supply of about 94.3 billion. Transfers of it are the most common single kind of contract call, often a quarter or more of a block; the mix chart in live mode counts them as they happen. Many plain TRX transfers, by contrast, move a millionth of a TRX, a pattern typical of address-poisoning spam.

What live mode shows

Live mode polls a public TronGrid node about once a block, with a PublicNode fallback, for the newest block, the newest solidified block and the fee receipts. Block numbers, hashes, producers, transaction types, the succeeded and failed split, energy used and TRX burned are all real. The ring is the 27 active SRs in vote order, which is the order slots go round, sized by votes, with the next 100 candidates as SR Partners outside it. The SRs that light up as having built on a block are the real producers of the blocks that followed it, and it turns teal when the node reports it solidified. Only the relay between nodes is a replay.

What the animation simplifies

Step-by-step mode stretches one block over about fifteen seconds and fast-forwards the 18 slots that solidify it; on the real chain a new block is produced while earlier ones are still collecting acknowledgements. Gossip timing and fee sizes are illustrative. The protocol details are in the java-tron consensus documentation, the resource model and the Super Representatives guide.